Red Hat Linux Security Advisories & CVEs
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Latest Red Hat advisories
High [CVE-2026-64539] Fix stack OOB write when prepending the Flags AD
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: eir: Fix stack OOB write when prepending the Flags AD eir_create_adv_data() builds the advertising data into a fixed-size buffer ("size", 31 for the legacy path). It may prepend a 3-byte "Flags" AD structure (LE_AD_NO_BREDR on an LE-only controller) and then copies the per-instance data without checking that it still fits: memcpy(ptr, adv->adv_data, adv->adv_data_len); tlv_data_max_len() only reserves those 3 bytes when the user-supplied flags carry a managed-flags bit, so an instance added with flags == 0 is accepted with adv_data_len up to the full buffer. Reachable by a local user with CAP_NET_ADMIN owning an LE-only controller on the legacy advertising path. Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: kernel-rt.
High [CVE-2026-64548] bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data() When the scatterlist ring is full or nearly full, bpf_msg_push_data() enters a copy fallback path and computes copy + len for the page allocation size. Since len comes from BPF with arg3_type = ARG_ANYTHING and both are u32, a crafted len can wrap the sum to a small value, causing an undersized allocation followed by an out-of-bounds memcpy. BUG: unable to handle page fault for address: ffffed104089a402 Oops: Oops: 0000 [#1] SMP KASAN NOPTI Call Trace: __asan_memcpy (mm/kasan/shadow.c:105) bpf_msg_push_data (net/core/filter.c:2852 net/core/filter.c:2788) bpf_prog_9ed8b5711920a7d7+0x2e/0x36 sk_psock_msg_verdict (net/core/skmsg.c:934) tcp_bpf_sendmsg (net/ipv4/tcp_bpf.c:421 net/ipv4/tcp_bpf.c:584) __sys_sendto (net/socket.c:2206) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Add an overflow check before the allocation. Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-53669] Open Redirect vulnerability via backslashes in navigation components
React Router is a router for React. Versions 6.0.0 through 7.17.0 are vulnerable to Open Redirtect through use of backslashes in and useNavigate. This issue is a follow up to CVE-2025-68470 and has been fixed in version 7.18.0. A remote attacker could exploit this vulnerability by crafting a malicious link that uses backslashes within the or useNavigate components. This could lead to an Open Redirect, allowing the attacker to redirect users to arbitrary external websites, potentially for phishing or other malicious purposes. This could facilitate phishing attacks against users. Red Hat severity: Moderate — CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N). Weakness: CWE-601. Affected products named by the advisory: Red Hat Hardened Images; Cryostat 4; Exploit Intelligence; Gatekeeper 3; and 41 more. Affected products named by the advisory: Migration Toolkit for Virtualization; Multicluster Engine for Kubernetes; Network Observability Operator; Node HealthCheck Operator; and 37 more.
Medium [CVE-2026-55685] @remix-run/server-runtime: React Router: Denial of Service via unauthenticated manifest endpoint requests
React Router is a router for React. In versions 7.0.0 through 7.17.0, the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times. This issue has been fixed in version 7.18.0. An unauthenticated attacker can send targeted requests to the manifest endpoint, leading to a denial of service (DoS). This can put a heavy load on the server, significantly slowing down response times and impacting the availability of the application. Repeated, targeted requests to this endpoint place heavy load on the server and can degrade or deny service for other users. Applications using Declarative Mode () or Data Mode (createBrowserRouter/) do not run this server-side code path and are not affected. This mirrors the same re-scoring applied to the predecessor flaw, CVE-2026-42342, for the same endpoint family. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-770. Affected products named by the advisory: Red Hat OpenShift AI 2.25; Red Hat OpenShift AI 3.4; Exploit Intelligence; Network Observability Operator; and 14 more.
Medium [CVE-2026-53668] Cross-Site Scripting (XSS) via open redirects
React Router is a router for React. In versions 6.30.2 through 6.30.4 and 7.9.6 through 7.12.0, applications that allow open redirects are vulnerable to XSS. An attacker could craft a malicious link that redirects users to an unexpected external site or that exploits an XSS vector. This issue has been fixed in version 7.13.0. In addition to the redirect itself, a crafted target URL can be used to achieve Cross-Site Scripting (XSS) against the vulnerable application, potentially exposing session data or allowing unauthorized actions in the context of the redirecting origin. Red Hat's CVSS score (6.9, AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N) matches the upstream/CVE.org self-assigned score exactly, so no Red Hat-specific re-scoring was applied. Red Hat severity: Moderate — CVSS 6.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N). Weakness: CWE-601. Affected products named by the advisory: Cryostat 4; Migration Toolkit for Virtualization; Multicluster Engine for Kubernetes; OpenShift Lightspeed; and 16 more.
Medium [CVE-2026-53667] Untrusted redirects due to missing protocol validation
React Router is a router for React. In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources. This issue is a follow up to CVE-2026-53667, and only affects consuming applications if they are using the unstable RSC APIs. This issue has been fixed in version 7.18.0. The RSCErrorHandler component, used in applications leveraging unstable React Server Components (RSC) Application Programming Interfaces (APIs), is missing crucial protocol validation. This vulnerability allows an attacker to redirect users to untrusted external websites. Such redirects can lead to information disclosure or facilitate phishing attacks, potentially exposing sensitive user data. Red Hat's CVSS score (6.9, AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N) matches the upstream/CVE.org self-assigned score exactly, so no Red Hat-specific re-scoring was applied. Red Hat severity: Moderate — CVSS 6.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N). Weakness: CWE-601. Affected products named by the advisory: Exploit Intelligence; Network Observability Operator; OpenShift Lightspeed; OpenShift Pipelines; and 8 more.
Medium [CVE-2026-53666] Information disclosure via client-side constructor execution
React Router is a router for React. In versions 6.4.0 through 7.17.0, if application code was written in a way that allows attacker-supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for an attacker to trigger unexpected constructor execution on the client, which would in turn trigger an outbound network request. This is only possible with very specific (and unlikely) application-layer code. Note that this does not impact an application if it is using Declarative Mode. It only impacts Framework Mode and Data Mode applications that perform manual SSR/hydration. This issue has been fixed in version 7.18.0. This execution could lead to an outbound network request, potentially resulting in limited information disclosure or unintended network activity. Red Hat severity: Moderate — CVSS 6.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N). Weakness: CWE-502. Affected products named by the advisory: Cryostat 4; Exploit Intelligence; Gatekeeper 3; Migration Toolkit for Applications 8; and 41 more. Affected products named by the advisory: Migration Toolkit for Containers; Migration Toolkit for Virtualization; Multicluster Engine for Kubernetes; Network Observability Operator; and 37 more.
Medium [CVE-2026-66757] signed integer overflow in file-sgi (sgi-lib) causes the plugin to crash on RLE SGI images
A flaw was found in the file-sgi plugin in GIMP. When processing an RLE-compressed SGI image, the plugin allocates memory for a row table. The image header dimensions (ysize and zsize) are read as 16-bit unsigned integers. If a crafted file sets both dimensions to their maximum value (65535), the multiplication ysize * zsize overflows the standard 32-bit int boundary before being passed to calloc. This integer overflow issue results in undefined behavior, aborting the plugin and causing a denial of service. Due to this reason, this flaw has been rated with a moderate severity. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-190. Affected Red Hat products: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: gimp.
Medium [CVE-2026-64643] Information disclosure via Server Action ID exposure
Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, Next.js applications using App Router, Server Actions (use server) or use cache endpoints can be disclosed bypassing any authentication on the pages where these endpoints are usually used. Server Action IDs can be disclosed to unauthenticated users via publicly served client artifacts (for example, static chunks containing action references). By itself, this disclosure is typically a recon/enumeration primitive; however, it can increase risk when combined with other weaknesses. This issue has been fixed in versions 15.5.21 and 16.2.11. A flaw was found in Next.js. This bypasses authentication on pages where these endpoints are used, leading to information disclosure. This Moderate information disclosure vulnerability in Next.js applications allows unauthenticated users to obtain Server Action IDs from publicly served client artifacts. While primarily a reconnaissance primitive, this exposure could increase overall risk when chained with other weaknesses. Red Hat products and services that incorporate Next.js, such as Red Hat AMQ, Red Hat Enterprise Linux AI, and cloud.redhat.com offerings, are affected. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N). Weakness: CWE-201.
Medium [CVE-2026-17574] Denial of Service via crafted HDF5 file processing
HDF5 contains a NULL pointer dereference vulnerability. Processing a crafted HDF5 file containing an attribute with an invalid variable-length datatype type field may cause the application to crash when the attribute is read. A flaw was found in HDF5. A local user can exploit this vulnerability by processing a specially crafted HDF5 file. This issue affects Red Hat products that utilize HDF5 for data handling, requiring user interaction to process the malicious file. Red Hat severity: Moderate — CVSS 5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-476. Affected Red Hat products: Red Hat AI Inference Server; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat does not currently list a fixing RHSA for this CVE.
Medium [CVE-2026-17573] HDF5 library: Denial of Service via crafted HDF5 file processing
A double free vulnerability was discovered in the HDF5 library. Processing a crafted HDF5 file containing an oversized chunk size field via h5repack may cause the application to abort due to a double free. This could cause the application to unexpectedly terminate, leading to a denial of service. This Moderate severity flaw in the HDF5 library can lead to a denial of service. It requires a local attacker to trick a user into processing a specially crafted HDF5 file with the `h5repack` utility, which could cause the application to crash due to a double free vulnerability. Red Hat severity: Moderate — CVSS 5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-763. Affected Red Hat products: Red Hat Hardened Images; Red Hat AI Inference Server; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat fixing advisory: RHSA-2026:61630.
Medium [CVE-2026-17572] Denial of Service via crafted file requiring user interaction
Heap-based buffer overflow in the SOHM list-index deserialization code in HDF5 through 2.1.1 on all platforms allows attackers to cause a denial of service (crash) via a crafted HDF5 file whose shared-message list index declares a num_messages count exceeding list_max, triggering out-of-bounds heap reads and writes in H5SM__cache_list_deserialize and H5SM__cache_list_verify_chksum. A flaw was found in HDF5, a data management library. The malformed file can trigger out-of-bounds memory operations, leading to application crashes or instability. This Moderate impact vulnerability in HDF5 requires user interaction to process a specially crafted HDF5 file, limiting the attack vector to local scenarios. Successful exploitation can lead to a denial of service. The HDF5 library is used in Red Hat Enterprise Linux AI, Red Hat AI Inference Server, and Red Hat OpenShift AI. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-787. Affected Red Hat products: Red Hat Hardened Images; Red Hat AI Inference Server; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI). Red Hat fixing advisory: RHSA-2026:61630.
Medium [CVE-2026-47078] Arbitrary file write via relative path traversal in zip module
Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive. zip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter:.. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as../x/y causes the counter to go negative mid-traversal then recover to zero, passing validation while resolving to a location outside the extraction directory when joined with the current working directory via add_cwd. This vulnerability is associated with program file lib/stdlib/src/zip.erl. This issue affects OTP from OTP 27.1 before OTP 29.0.4, OTP 28.5.0.4 and OTP 27.3.4.15, corresponding to stdlib from 6.1 before 8.0.3, 7.3.0.1 and 6.2.2.4. A remote attacker could craft a malicious zip archive containing specially formed entry names. When processed, this could allow the attacker to write arbitrary files outside the intended extraction directory, potentially leading to remote code execution or data corruption. Red Hat severity: Moderate — CVSS 4.4 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L). Weakness: CWE-22.
Medium [CVE-2026-15003] Heap-buffer-overflow in linker leads to information disclosure and denial of service
A flaw was found in the GNU Binutils (Binary Utilities) linker. This vulnerability, a heap-buffer-overflow read (CWE-125), occurs when the linker processes a specially crafted 32-bit XCOFF (Extended Common Object File Format) object file. An attacker could exploit this by providing a malicious file, leading to an out-of-bounds read of memory. This can result in information disclosure, potentially revealing sensitive heap data, and a Denial of Service (DoS) due to the linker crashing. This vulnerability is rated as High. A heap-buffer-overflow in the GNU Binutils linker (`ld`) can lead to information disclosure and denial of service when processing specially crafted 32-bit XCOFF object files. This occurs because the linker uses an unvalidated field from untrusted input as an array index, potentially exposing heap metadata or causing a crash during the linking process. Red Hat severity: Moderate — CVSS 5.6 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:H). Weakness: CWE-125. Affected Red Hat products: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4. Red Hat fixing advisory: RHSA-2026:47171.
Medium [CVE-2026-66053] Apache Thrift Python bindings: Information disclosure due to improper certificate validation
Improper Validation of Certificate with Host Mismatch vulnerability in Apache Thrift Python bindings. This issue affects Apache Thrift: before 0.24.0. Users are recommended to upgrade to version 0.24.0, which fixes the issue. This replaces CVE-2026-41603 This vulnerability, stemming from improper validation of certificates with host mismatch, could allow a remote attacker to intercept and access sensitive information. The issue occurs when the Python client fails to adequately verify the server's certificate against its hostname, potentially enabling a man-in-the-middle (MITM) attack and leading to information disclosure. While Red Hat Enterprise Linux AI is not affected, OpenShift Container Platform, Red Hat OpenShift Update Service, and Confidential Compute Attestation are impacted where these bindings are used in network communication. Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-295. Affected Red Hat products: Red Hat Hardened Images; Red Hat OpenShift Container Platform 4. Red Hat fixing advisory: RHSA-2026:49837.
Medium [CVE-2026-58023] Information disclosure and denial of service due to out-of-bounds read
Out-of-bounds Read vulnerability in Apache Thrift c_glib bindings. This issue affects Apache Thrift: before 0.24.0. Users are recommended to upgrade to version 0.24.0, which fixes the issue. This out-of-bounds read vulnerability allows an attacker to potentially access sensitive information or cause a denial of service. The vulnerability occurs when the software attempts to read data beyond the allocated memory buffer. Red Hat products such as OpenShift Container Platform, Red Hat OpenShift Update Service, and Confidential Compute Attestation are affected where they utilize vulnerable versions of Apache Thrift. Red Hat Enterprise Linux AI is not affected as the vulnerable code is not present. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L). Weakness: CWE-125. Affected Red Hat products: Red Hat Hardened Images. Under investigation: Red Hat Ceph Storage 7; Red Hat Ceph Storage 8; Red Hat Ceph Storage 9. Red Hat fixing advisory: RHSA-2026:49837.
Medium [CVE-2026-55970] Apache Thrift C++ bindings: Information disclosure due to buffer over-read vulnerability
Buffer Over-read vulnerability in Apache Thrift C++ bindings. This issue affects Apache Thrift: before 0.24.0. Users are recommended to upgrade to version 0.24.0, which fixes the issue. This buffer over-read vulnerability allows a remote attacker to read beyond the intended memory boundaries. This could lead to the disclosure of sensitive information or cause the application to become unavailable. Red Hat products utilizing affected versions of Apache Thrift, such as Red Hat Enterprise Linux AI, OpenShift Container Platform, and Red Hat OpenShift AI, may be susceptible if processing untrusted data with Thrift client applications. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L). Weakness: CWE-125. Affected Red Hat products: Red Hat Hardened Images; Confidential Compute Attestation; Red Hat AI Inference Server; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI); Red Hat OpenShift Container Platform 4; Red Hat OpenShift Update Service. Red Hat fixing advisory: RHSA-2026:49837.
Medium [CVE-2026-48145] Information disclosure due to improper certificate validation
Information disclosure due to improper certificate validation. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-297.
Medium [CVE-2026-16554] Remote code execution due to integer overflow via crafted JSON
cJSON library is vulnerable to an integer overflow in the print_string_ptr() function in cJSON.c on 32-bit platforms. The escape_characters counter, a 32-bit size_t, can wrap around when processing strings containing approximately 858,993,460 or more control characters, causing the output buffer to be allocated based on an underestimated length. When cJSON_PrintBuffered() is used with a pre-allocated buffer, the subsequent write loop overflows the heap allocation. An attacker supplying a crafted JSON string to an application using cJSON on a 32-bit platform can cause a heap buffer overflow, potentially leading to remote code execution, information disclosure, or denial of service. Because project creator contact attempts were unsuccessful, the vulnerability has only been confirmed in version 1.7.19 but may also affect other versions. This issue does not affect the versions of cJSON, or of components that vendor/bundle it (such as rpm-ostree), as shipped with Red Hat Enterprise Linux, Red Hat Satellite, or OpenShift Container Platform.
Medium [CVE-2026-64535] Fix potential UAF when ddgst mismatch
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: Fix potential UAF when ddgst mismatch Shivam Kumar found via vulnerability testing: When data digest is enabled on an NVMe/TCP connection and a digest mismatch occurs on a non-final H2C_DATA PDU during an R2T-based data transfer, the digest error handler in nvmet_tcp_try_recv_ddgst() calls nvmet_req_uninit() — which performs percpu_ref_put() on the submission queue — but does NOT mark the command as completed. It does not set cqe->status, does not modify rbytes_done, and does not clear any flag. When the subsequent fatal error triggers queue teardown, nvmet_tcp_uninit_data_in_cmds() iterates all commands, checks nvmet_tcp_need_data_in() for each one, and finds that the already-uninited command still appears to need data (because rbytes_done status == 0). It therefore calls nvmet_req_uninit() a second time on the same command — a double percpu_ref_put against a single percpu_ref_get. A use-after-free flaw was found in the Linux kernel's NVMe-over-Fabrics TCP target (nvmet-tcp) driver. This use-after-free and reference-count underflow can crash the kernel (denial of service) when a remote NVMe/TCP initiator triggers a digest mismatch against a host configured as an NVMe/TCP target.
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