Red Hat Linux Security Advisories & CVEs
4898 advisories tracked · Red Hat Security Data API · direct feeds checked every minute; rate-limited backstops use a safe source cadence
Android app · Google Play
Monitor Red Hat CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
Security advisories for your Red Hat release
Pick your distribution release to see every advisory issued for it and its severity mix. Fixes ship as errata — keep the system patched. This is the release's advisory history, not a per-package scan.
Official source
Red Hat Security Data API
Red Hat Enterprise Linux errata (RHSA) via the official Red Hat Security Data API — CVE severity, CVSS and affected packages. A credential-free official source.
Latest Red Hat advisories
High [CVE-2024-0646] ktls overwrites readonly memory pages when using function splice with a ktls socket as destination
An out-of-bounds memory write flaw was found in the Linux kernel’s Transport Layer Security functionality in how a user calls a function splice with a ktls socket as the destination. This flaw allows a local user to crash or potentially escalate their privileges on the system. Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.2 Telecommunications Update Service; Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions; and 10 more. Affected products named by the advisory: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Telecommunications Update Service; Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.6 Extended Update Support; and 5 more.
High [CVE-2024-0567] Gnutls: rejects certificate chain with distributed trust
A vulnerability was found in GnuTLS, where a cockpit (which uses gnuTLS) rejects a certificate chain with distributed trust. This issue occurs when validating a certificate chain with cockpit-certificate-ensure. This flaw allows an unauthenticated, remote client or attacker to initiate a denial of service attack. The issue is marked as moderate because it involves a vulnerability in GnuTLS, specifically affecting Cockpit, which utilizes GnuTLS. This is a bug in the GnuTLS library, Cockpit does not copy this code, but uses the shared lib at runtime. Hence, patching gnutls is necessary and sufficient to address this, hance Cockpit is not affected by this issue. Red Hat severity: Moderate — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-347. Affected Red Hat products: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Extended Update Support; RHODF-4.15-RHEL-9; RHOL-5.8-RHEL-9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat lists Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 3.11 as not affected. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2024:0533, RHSA-2024:1082, RHSA-2024:1383, RHSA-2024:2094. Affected products named by the advisory: Red Hat package: gnutls; Red Hat package: cockpit.
High [CVE-2023-5981 +1] Gnutls: incomplete fix for CVE-2023-5981
A vulnerability was found in GnuTLS. The response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from the response times of ciphertexts with correct PKCS#1 v1.5 padding. This issue may allow a remote attacker to perform a timing side-channel attack in the RSA-PSK key exchange, potentially leading to the leakage of sensitive data. CVE-2024-0553 is designated as an incomplete resolution for CVE-2023-5981. The identified vulnerability in the GnuTLS library, designated as CVE-2024-0553, presents a moderate severity concern due to its potential for facilitating timing side-channel attacks in RSA-PSK ciphersuites. While the flaw allows for the exploitation of timing differentials during the key exchange process, enabling attackers to infer sensitive data, its impact is constrained by several factors. Firstly, successful exploitation requires precise timing measurements and sophisticated analysis techniques, posing a significant barrier to entry for potential attackers. Additionally, the effectiveness of the attack is contingent on environmental factors such as network latency and system load, further limiting its practical feasibility. Red Hat severity: Moderate — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N). Weakness: CWE-203.
High [CVE-2023-6546] gsm multiplexing race condition leads to privilege escalation
A race condition was found in the GSM 0710 tty multiplexor in the Linux kernel. This issue occurs when two threads execute the GSMIOC_SETCONF ioctl on the same tty file descriptor with the gsm line discipline enabled, and can lead to a use-after-free problem on a struct gsm_dlci while restarting the gsm mux. This could allow a local unprivileged user to escalate their privileges on the system. Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Telecommunications Update Service; and 8 more. Affected products named by the advisory: Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 8.8 Extended Update Support; Red Hat Enterprise Linux 9.0 Extended Update Support; and 3 more. Affected products named by the advisory: Red Hat Enterprise Linux 9.2 Extended Update Support; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8; RHOL-5.7-RHEL-8.
High [CVE-2023-6563] Keycloak: offline session token dos
An unconstrained memory consumption vulnerability was discovered in Keycloak. It can be triggered in environments which have millions of offline tokens (> 500,000 users with each having at least 2 saved sessions). If an attacker creates two or more user sessions and then open the "consents" tab of the admin User Interface, the UI attempts to load a huge number of offline client sessions leading to excessive memory and CPU consumption which could potentially crash the entire system. While this vulnerability can enable complete compromise of system availability, it is not possible to be triggered in every environment. The impact is rated as Important due to several preconditions (number of users and how many sessions each user has) which are beyond an attacker's control. Red Hat severity: Important — CVSS 7.7 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H). Weakness: CWE-770. Affected Red Hat products: Red Hat Single Sign-On 7.6 for RHEL 7; Red Hat Single Sign-On 7.6 for RHEL 8; Red Hat Single Sign-On 7.6 for RHEL 9; RHEL-8 based Middleware Containers; Single Sign-On 7.6.6. Red Hat lists Red Hat Build of Keycloak as not affected. Red Hat fixing advisory: RHSA-2023:7854, RHSA-2023:7856, RHSA-2023:7855, RHSA-2023:7857, RHSA-2023:7858.
High [CVE-2023-5379] ajp request closes connection exceeding maxrequestsize
A flaw was found in Undertow. When an AJP request is sent that exceeds the max-header-size attribute in ajp-listener, JBoss EAP is marked in an error state by mod_cluster in httpd, causing JBoss EAP to close the TCP connection without returning an AJP response. This happens because mod_proxy_cluster marks the JBoss EAP instance as an error worker when the TCP connection is closed from the backend after sending the AJP request without receiving an AJP response, and stops forwarding. This issue could allow a malicious user could to repeatedly send requests that exceed the max-header-size, causing a Denial of Service (DoS). Affected products named by the advisory: Red Hat JBoss Enterprise Application Platform 7.1 EUS for RHEL 7; Red Hat JBoss Enterprise Application Platform 7.3 EUS for RHEL 7; Red Hat JBoss Enterprise Application Platform 7; Red Hat Single Sign-On 7.
High [CVE-2023-6394] Quarkus: graphql operations over websockets bypass
A flaw was found in Quarkus. This issue occurs when receiving a request over websocket with no role-based permission specified on the GraphQL operation, Quarkus processes the request without authentication despite the endpoint being secured. This can allow an attacker to access information and functionality outside of normal granted API permissions. 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-862. Affected Red Hat products: Red Hat build of Quarkus 3.2.9.Final. Red Hat fixing advisory: RHSA-2023:7612.
High [CVE-2023-6610] Kernel: oob access in smb2_dump_detail
An out-of-bounds read vulnerability was found in smb2_dump_detail in fs/smb/client/smb2ops.c in the Linux Kernel. This issue could allow a local attacker to crash the system or leak internal kernel information. Red Hat severity: Moderate — CVSS 7.1 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H). Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 8.8 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Extended Update Support; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8; RHOL-5.8-RHEL-9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2024:0881, RHSA-2024:0897, RHSA-2024:0724, RHSA-2024:1404, RHSA-2024:1248, RHSA-2024:0723, RHSA-2024:0725, RHSA-2024:2094. Affected products named by the advisory: Red Hat package: kernel-rt.
High [CVE-2023-6606] Kernel: out-of-bounds read vulnerability in smbcalcsize
An out-of-bounds read vulnerability was found in smbCalcSize in fs/smb/client/netmisc.c in the Linux Kernel. This issue could allow a local attacker to crash the system or leak internal kernel information. Red Hat severity: Moderate — CVSS 7.1 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H). Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 8.8 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Extended Update Support; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8; RHOL-5.8-RHEL-9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2024:0881, RHSA-2024:0897, RHSA-2024:1188, RHSA-2024:1404, RHSA-2024:1248, RHSA-2024:0723, RHSA-2024:0725, RHSA-2024:2094. Affected products named by the advisory: Red Hat package: kernel-rt.
High [CVE-2023-46847] denial of service in http digest authentication
Squid is vulnerable to a Denial of Service, where a remote attacker can perform buffer overflow attack by writing up to 2 MB of arbitrary data to heap memory when Squid is configured to accept HTTP Digest Authentication. Affected products named by the advisory: Red Hat Enterprise Linux 6 Extended Lifecycle Support; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 7.6 Advanced Update Support; Red Hat Enterprise Linux 7.7 Advanced Update Support; and 11 more. Affected products named by the advisory: Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.2 Telecommunications Update Service; Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions; and 5 more.
High [CVE-2023-5178] Kernel: use after free in nvmet_tcp_free_crypto in nvme
A use-after-free vulnerability was found in drivers/nvme/target/tcp.c` in `nvmet_tcp_free_crypto` due to a logical bug in the NVMe/TCP subsystem in the Linux kernel. This issue may allow a malicious user to cause a use-after-free and double-free problem, which may permit remote code execution or lead to local privilege escalation. This vulnerability is actual only for systems where NVME over TCP being used. 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-416. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.2 Telecommunications Update Service; Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Telecommunications Update Service; Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 8.8 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.0 Extended Update Support; Red Hat Enterprise Linux 9.2 Extended Update Support; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8. Red Hat lists Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7 as not affected.
High [CVE-2023-4692] out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved. This vulnerability is considered as 'Low' severity by Red Hat as the NTFS module is not shipped as part of Red Hat's signed grub2 image. Weakness: CWE-122. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2024:3184, RHSA-2024:2456. Affected products named by the advisory: Red Hat package: grub2.
High [CVE-2023-4911] buffer overflow in ld.so leading to privilege escalation
A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges. This vulnerability was introduced in glibc version 2.34. RHEL-8 ships glibc 2.28, which is not originally affected by this vulnerability. RHEL-8.4 and older are not affected by this vulnerability. Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-122. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.0 Extended Update Support; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8. Red Hat lists Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7 as not affected. Red Hat fixing advisory: RHSA-2023:5455, RHSA-2023:5476, RHSA-2023:5453, RHSA-2023:5454, RHSA-2024:0033. Affected products named by the advisory: Red Hat package: glibc.
High [CVE-2023-42753] potential slab-out-of-bound access due to integer underflow
An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system. Affected products named by the advisory: Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 7.7 Advanced Update Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.2 Advanced Update Support; and 11 more. Affected products named by the advisory: Red Hat Enterprise Linux 8.2 Telecommunications Update Service; Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Telecommunications Update Service; and 6 more.
High [CVE-2023-4853] http security policy bypass
A flaw was found in Quarkus where HTTP security policies are not sanitizing certain character permutations correctly when accepting requests, resulting in incorrect evaluation of permissions. This issue could allow an attacker to bypass the security policy altogether, resulting in unauthorized endpoint access and possibly a denial of service. Affected products named by the advisory: Openshift Serverless 1 on RHEL 8; Red Hat build of Quarkus 2.13.8.SP2; Red Hat OpenShift Serverless 1.30; RHEL-8 based Middleware Containers; and 2 more. Affected products named by the advisory: Red Hat Process Automation 7.
High [CVE-2023-39417] Postgresql: extension script @substitutions@ within quoting allow sql injection
IN THE EXTENSION SCRIPT, a SQL Injection vulnerability was found in PostgreSQL if it uses @extowner@, @extschema@, or @extschema:...@ inside a quoting construct (dollar quoting, '', or ""). If an administrator has installed files of a vulnerable, trusted, non-bundled extension, an attacker with database-level CREATE privilege can execute arbitrary code as the bootstrap superuser. Bundled extensions are not vulnerable. Also, PostgreSQL will block this attack in the core server, so there's no need to modify individual extensions. Red Hat severity: Moderate — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-89. Affected products named by the advisory: Red Hat Advanced Cluster Security 4.2; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.2 Telecommunications Update Service; Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions; and 12 more.
High [CVE-2023-4004] Kernel: netfilter: use-after-free due to improper element removal in nft_pipapo_remove
A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their privileges on the system. Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-416. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.2 Advanced Update Support; Red Hat Enterprise Linux 8.2 Telecommunications Update Service; Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Telecommunications Update Service; Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.0 Extended Update Support; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8. Red Hat lists Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7 as not affected. Affected products named by the advisory: Red Hat package: kernel-rt.
High [CVE-2023-0597 +1] a per-cpu entry area leak was identified through the init_cea_offsets function when prefetchnta and prefetcht2 instructions being used for the per-cpu entry area mapping to the user space
A possible unauthorized memory access flaw was found in the Linux kernel's cpu_entry_area mapping of X86 CPU data to memory, where a user may guess the location of exception stacks or other important data. Based on the previous CVE-2023-0597, the 'Randomize per-cpu entry area' feature was implemented in /arch/x86/mm/cpu_entry_area.c, which works through the init_cea_offsets() function when KASLR is enabled. However, despite this feature, there is still a risk of per-cpu entry area leaks. This issue could allow a local user to gain access to some important data with memory in an expected location and potentially escalate their privileges on the system. For the Red Hat Enterprise Linux the previous fix for the CVE-2023-0597 that is already included actually prevents described attack vector for this CVE-2023-3640 too. 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-385. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Will not fix / out of support: Red Hat Enterprise Linux 8. 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-2023-2008] improper validation of array index leading to local privilege escalation
A flaw was found in the Linux kernel's udmabuf device driver, within a fault handler. This issue occurs due to the lack of proper validation of user-supplied data, which can result in memory access past the end of an array. This may allow an attacker to escalate privileges and execute arbitrary code in the context of the kernel. Affected products named by the advisory: Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.0 Extended Update Support.
High [CVE-2023-1989] Kernel: use after free bug in btsdio_remove due to race condition
A use-after-free flaw was found in btsdio_remove in drivers\bluetooth\btsdio.c in the Linux Kernel. In this flaw, a call to btsdio_remove with an unfinished job, may cause a race problem leading to a UAF on hdev devices. Because successful exploitation of this flaw requires that a system supports SDIO hardware and that an attacker has control over attaching and detaching that hardware, Red Hat assesses the impact of this vulnerability as Moderate. 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-416. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 8.8 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2023:6901, RHSA-2023:7077, RHSA-2024:0724, RHSA-2024:4740, RHSA-2023:6583. Affected products named by the advisory: Red Hat package: kernel-rt.