Red Hat Linux Security Advisories & CVEs
3066 advisories tracked · Red Hat Security Data API · direct feeds checked every minute; rate-limited backstops use a safe source cadence
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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.
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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-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. Affected products named by the advisory: 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; and 1 more. Affected products named by the advisory: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8.
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-2023-0597 +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. Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
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-2013-0335] Openstack nova: vnc proxy can connect to the wrong vm
OpenStack Compute (Nova) Grizzly, Folsom (2012.2), and Essex (2012.1) allows remote authenticated users to gain access to a VM in opportunistic circumstances by using the VNC token for a deleted VM that was bound to the same VNC port. Affected product named by the advisory: OpenStack Folsom for RHEL 6.