Time-of-check Time-of-use (TOCTOU) The advisory has been revoked - it doesn't affect any version of package kernel-rt-debug-devel-matched (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-RHEL9-KERNELRTDEBUGDEVELMATCHED-12740623
- published16 Sept 2025
- disclosed15 Sept 2025
Introduced: 15 Sep 2025
CVE-2023-53205 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug-devel-matched package and not the kernel-rt-debug-devel-matched package as distributed by RHEL.
In the Linux kernel, the following vulnerability has been resolved:
KVM: s390/diag: fix racy access of physical cpu number in diag 9c handler
We do check for target CPU == -1, but this might change at the time we are going to use it. Hold the physical target CPU in a local variable to avoid out-of-bound accesses to the cpu arrays.
References
- https://access.redhat.com/security/cve/CVE-2023-53205
- https://git.kernel.org/stable/c/0bc380beb78aa352eadbc21d934dd9606fcee808
- https://git.kernel.org/stable/c/86bfb18bad60fc468e5f112cbbd918462a8dd435
- https://git.kernel.org/stable/c/a9ccf140a2a03a0ae82be4bdfbdd17bdaea72ff5
- https://git.kernel.org/stable/c/dc7e0192c470a53d847c79a2796f9ac429477a26