Red Hat Linux Security Advisories & CVEs
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Latest Red Hat advisories
High [CVE-2025-50327] Privilege escalation and arbitrary code execution via Mark-of-the-Web bypass
Privilege escalation and arbitrary code execution via Mark-of-the-Web bypass. Red Hat rates this important (CVSS 8.8). Weakness: CWE-1289.
High [CVE-2026-73144] Unbounded memory growth via unvalidated list count in FRN module
A flaw was found in svxlink's FRN module. A server-supplied list item count is accepted without validation, allowing a malicious server to trigger unbounded memory allocation. This can lead to memory exhaustion and a denial of service. svxlink is not shipped in any Red Hat Enterprise product. It is available in Fedora as a community-maintained package. Red Hat severity: Important. Weakness: CWE-770.
High [CVE-2026-56820] Certificate revocation bypass via OCSP response replay attack
Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and prior to 4.1.135.Final, `OcspClient` does not validate that the `CertificateID` in an OCSP response matches the requested `CertificateID`, which can lead to replay attack. `OcspClient.validateResponse` accepts a legitimately signed `GOOD` status response for an unrelated certificate issued by the same CA, allowing bypass of revocation checks for another certificate. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. A flaw was found in Netty. The `OcspClient` component fails to validate that the Certificate ID in an Online Certificate Status Protocol (OCSP) response matches the requested Certificate ID. This can result in the acceptance of revoked certificates, potentially compromising the integrity and confidentiality of communications. This is an Important flaw in Netty's `OcspClient` that could allow a remote attacker to bypass certificate revocation checks. Exploitation requires high attack complexity, indicating specific conditions or attacker preparation. Red Hat severity: Important — CVSS 7.4 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N). Weakness: CWE-295. Affected Red Hat products: Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16; Red Hat Data Grid 8.6.3.
High [CVE-2026-56819] Denial of Service via HTTP/2 DATA frame memory leak
Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, a remote unauthenticated peer can leak one direct `ByteBuf` per HTTP/2 `DATA` frame in applications that enable HTTP/2 content decompression via `DelegatingDecompressorFrameListener`. When a `DATA` frame is processed for a stream whose decompressor has already been closed, `Http2Decompressor.decompress(...)` calls `decompressor.writeInbound(data.retain())` and does not release the retained buffer on the error path, eventually exhausting direct memory and crashing the JVM. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. A remote, unauthenticated attacker can exploit this vulnerability by sending specially crafted HTTP/2 DATA frames to applications that use Netty and have HTTP/2 content decompression enabled. This can lead to memory exhaustion, causing the application to crash and resulting in a Denial of Service (DoS). This is an Important vulnerability in Netty's HTTP/2 codec, which could lead to a denial of service. Red Hat products utilizing netty-codec-http2 with HTTP/2 content decompression enabled are susceptible to memory exhaustion when processing specially crafted HTTP/2 DATA frames.
High [CVE-2026-56817] Information disclosure via XML External Entity (XXE) vulnerability
Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, any caller that can deliver bytes to a Netty channel pipeline containing `XmlDecoder` can send XML with a `DOCTYPE` declaration to an `AsyncXMLInputFactory` instantiated with no security configuration, leaving DTD and entity handling active depending on Aalto XML async parser behavior and creating conditional XML external entity risk. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. A remote attacker could exploit this vulnerability by sending specially crafted XML data containing a DOCTYPE declaration to a vulnerable XmlDecoder within the Netty channel pipeline. This can lead to an XML External Entity (XXE) vulnerability, potentially allowing the attacker to disclose sensitive information from the system. This Important flaw in Netty's `XmlDecoder` component allows for XML External Entity (XXE) injection. When a Netty channel pipeline processes XML data with a `DOCTYPE` declaration via an `AsyncXMLInputFactory` that lacks proper security configuration, a remote attacker could potentially disclose sensitive information. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-611.
High [CVE-2026-56746] Security control bypass allows unauthorized requests via null origin header
Netty is a network application framework for development of protocol servers and clients. Versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, are vulnerable to security control bypass during the origin evaluation process. CorsHandler provides a shortCircuit() configuration designed to reject unauthorized cross-origin requests immediately, acting as a security control before requests reach the application. However, due to a logical operator error in the origin evaluation process, this protection can be entirely bypassed. An attacker can bypass the short-circuit mechanism by sending a request with an Origin: null header. This failure forwards unauthorized requests to the backend application, bypassing intended access controls. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. This could lead to a compromise of data integrity by allowing unauthorized actions. Red Hat ships Netty's netty-codec-http component in multiple products. Upgrade to Netty 4.1.136.Final or 4.2.16.Final to resolve this issue. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N). Weakness: CWE-807. Affected products named by the advisory: Cryostat 4 on RHEL 9; Red Hat AMQ Broker 7.13.6; Red Hat AMQ Broker 7.14.1; Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16; and 21 more.
High [CVE-2026-56745] Denial of Service via memory exhaustion in SPDY-to-HTTP codec
Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, the `SpdyHttpDecoder` handler in Netty's SPDY-to-HTTP codec allocates a pooled `ByteBuf` when processing a client-initiated `SYN_STREAM` frame with `FLAG_FIN=0` and stores the partially constructed `FullHttpRequest` in `messageMap`; when the remote peer sends `RST_STREAM` for that stream or the accumulated content exceeds `maxContentLength`, the decoder removes the entry but does not release the pooled `ByteBuf`, causing native memory exhaustion. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. A flaw was found in Netty. This oversight leads to native memory exhaustion, which can result in a Denial of Service (DoS) for the affected system. This is an Important denial of service vulnerability in Netty's SPDY-to-HTTP codec, affecting Red Hat products that utilize vulnerable versions of Netty. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-772. Affected products named by the advisory: Cryostat 4 on RHEL 9; Red Hat AMQ Broker 7.13.6; Red Hat AMQ Broker 7.14.1; Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16; and 20 more.
High [CVE-2026-55851] Netty codec-haproxy: Denial of Service via crafted PROXY protocol v2 message
Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final up to (but not including) 4.2.16.Final, and 4.1.0.Final up to (but not including) 4.1.135, the `HAProxyMessageDecoder` in Netty's `codec-haproxy` module performs protocol version detection by reading the 13th byte as a signed Java `byte` and widening it to `int` without masking; a PROXY protocol v2 binary prefix followed by version byte `0xFF` sign-extends to `-1`, collides with the decoder's need-more-data sentinel, and causes `ByteToMessageDecoder` to accumulate inbound bytes in an unbounded `cumulation` buffer until direct memory is exhausted. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final. A remote attacker could exploit a vulnerability in the HAProxyMessageDecoder by sending a specially crafted PROXY protocol v2 message. This leads to unbounded buffer accumulation, causing a denial of service (DoS) due to memory exhaustion. This impact is significant for applications that process PROXY protocol v2 messages using the affected Netty component. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-770.
High [CVE-2026-47063] Enhance Jar handling (Oracle CPU 2026-07)
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Libraries). Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 7.5 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N). A flaw was found in OpenJDK. There exists a potential existential forgery vulnerability in CMS and protocols which use CMS. In Java, CMS is used to sign JAR files. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N). Weakness: CWE-347. Affected products named by the advisory: OPENJDK ELS 11.0.32; Red Hat Build of OpenJDK 17.0.20; Red Hat Build of OpenJDK 21.0.12; Red Hat Build of OpenJDK 25.0.4; and 21 more. Affected products named by the advisory: Red Hat Build of OpenJDK 8u502; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; and 17 more.
High [CVE-2026-47057] Improve Nashorn index handling (Oracle CPU 2026-07)
Vulnerability in Oracle Java SE (component: Scripting). Supported versions that are affected are Oracle Java SE: 8u491, 8u491-perf and 11.0.31. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Java SE. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). A flaw was found in OpenJDK. There is an integer overflow in TypedArray.prototype.set() which can cause a DoS. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-190.
High [CVE-2026-47058] Enhance Dataview Implementation (Oracle CPU 2026-07)
Vulnerability in Oracle Java SE (component: Scripting). Supported versions that are affected are Oracle Java SE: 8u491, 8u491-perf and 11.0.31. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE accessible data as well as unauthorized access to critical data or complete access to all Oracle Java SE accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 7.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N). A flaw was found in OpenJDK. 1) DataView getter/setter methods use absolute ByteBuffer indexing and ignore the offset, allowing read and write to memory outside its intended window. 2) Missing bounds check in the DataView constructor fails to validate the capacity.
High [CVE-2026-56852] Denial of Service via invalid UTF-8 input
Denial of Service via invalid UTF-8 input. Red Hat rates this important (CVSS 7.5). Weakness: CWE-835. Red Hat lists fixing advisory RHSA-2026:49360 with package prometheus3-5-main-3.5.5-0.3.hum1, buildah-main-1.45.0-2.hum1, opentofu1-10-main-1.10.10-0.3.hum1, podman-main-6.0.2-2.1.hum1.
High [CVE-2026-11332 +1] argument injection in ansible-galaxy collection install via git clone (incomplete fix for CVE-2026-11332)
A flaw was found in ansible-core. An attacker who provides a crafted collection source URI containing git argument injection payloads can achieve arbitrary command execution when a user runs 'ansible-galaxy collection install' with the malicious source. This is an incomplete fix for CVE-2026-11332, which hardened the role install path but missed the equivalent collection install code path. Red Hat has assessed this vulnerability as Important because it allows arbitrary command execution when a user installs a collection from a crafted git source. Users who install collections exclusively from Ansible Galaxy or Automation Hub (HTTPS sources) are not exposed to this specific flaw. Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-88. Affected Red Hat products: Red Hat Satellite 6.17 for RHEL 9; Red Hat Satellite 6.18 for RHEL 9; Red Hat Satellite 6.19 for RHEL 9; Red Hat Ansible Automation Platform 2; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Red Hat fixing advisory: RHSA-2026:63387, RHSA-2026:63386, RHSA-2026:63385. Affected products named by the advisory: Red Hat package: ansible-core.
High [CVE-2026-59851] authentication bypass via missing GSSAPI principal check
A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does not verify whether the authenticated Kerberos principal is authorized for the requested local user, allowing authenticated clients to log in as arbitrary users. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-863. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Hardened Images. Red Hat lists Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected. Red Hat fixing advisory: RHSA-2026:55855, RHSA-2026:42922. Affected products named by the advisory: Red Hat package: libssh.
High [CVE-2026-46681] @nevware21/ts-utils: @nevware21/ts-utils: Arbitrary Code Execution via Prototype Pollution
@nevware21/ts-utils is a comprehensive TypeScript/JavaScript utility library. Prior to version 0.14.0, the _copyProps function in lib/src/object/copy.ts uses for...in to iterate over source object properties without an Object.hasOwnProperty check, and does not filter dangerous keys (__proto__, constructor, prototype). This allows an attacker to pollute the prototype chain of all objects in the application. Version 0.14.0 patches the issue. This vulnerability allows a remote attacker to manipulate the fundamental properties of objects within an application. By exploiting this, an attacker could potentially execute unauthorized code, leading to a complete compromise of the application. This vulnerability is rated as Important. This could lead to arbitrary code execution within applications utilizing the affected library, impacting data integrity and potentially system availability. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N). Weakness: CWE-915. Affected Red Hat products: Red Hat OpenShift Dev Spaces 3.30. Red Hat lists Red Hat OpenShift AI (RHOAI) as not affected. Red Hat fixing advisory: RHSA-2026:62260.
High [CVE-2026-16445] Root code execution via DHCP options command injection in NetworkManager initrd module
A flaw was found in dracut. A remote attacker on the adjacent network can exploit this vulnerability by providing specially crafted DHCP options, such as a malicious root-path, next-server, or bootfile name, to a system using dracut's NetworkManager-based initrd network module. These options are improperly handled and written into a temporary shell script without proper escaping, leading to command injection. This allows the attacker to achieve root code execution within the initramfs during system boot. This affects systems configured to boot using dracut's network-manager module with a DHCP-derived netroot (for example, NFS-root configurations). Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-78. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; Red Hat Hardened Images; Red Hat OpenShift Container Platform 4. Affected products named by the advisory: Red Hat package: dracut.
High [CVE-2026-16361] Memory safety bugs fixed in Firefox ESR 115.38 and Firefox ESR 140.13
Memory safety bugs present in Thunderbird ESR 140.12. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13. Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 10 more.
High [CVE-2026-16360] Memory safety bugs fixed in Firefox ESR 115.38, Firefox ESR 140.13 and Firefox 153
Memory safety bugs present in Firefox ESR 115.37, Firefox ESR 140.12 and Firefox 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-120. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 10 more.
High [CVE-2026-16412] Memory safety bugs fixed in Firefox ESR 140.13 and Firefox 153
Memory safety bugs present in Firefox ESR 140.12 and Firefox 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-787. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 10 more.
High [CVE-2026-16411] Memory safety bugs fixed in Firefox 153
Memory safety bugs present in Firefox 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153 and Thunderbird 153. Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825. Red Hat lists 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 as not affected.