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CVE-2023-53205KVM: s390/diag: fix racy access of physical cpu number in diag 9c handler
- 7.3HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
Published
- 13 months later
· 13 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.3.
Affected products
- affected 87e28a15c42cc592009c32a8c20e5789059027c2 – < a9ccf140a2a03a0ae82be4bdfbdd17bdaea72ff5
- affected 87e28a15c42cc592009c32a8c20e5789059027c2 – < 86bfb18bad60fc468e5f112cbbd918462a8dd435
- affected 87e28a15c42cc592009c32a8c20e5789059027c2 – < dc7e0192c470a53d847c79a2796f9ac429477a26
- affected 87e28a15c42cc592009c32a8c20e5789059027c2 – < 0bc380beb78aa352eadbc21d934dd9606fcee808
- affected 5.13
- unaffected < 5.13
- unaffected 5.15.121 – ≤ 5.15.*
- unaffected 6.1.39 – ≤ 6.1.*
- unaffected 6.4.4 – ≤ 6.4.*
- unaffected 6.5 – ≤ *
References
References4
- https://git.kernel.org/stable/c/a9ccf140a2a03a0ae82be4bdfbdd17bdaea72ff5 (opens in a new tab)
- https://git.kernel.org/stable/c/86bfb18bad60fc468e5f112cbbd918462a8dd435 (opens in a new tab)
- https://git.kernel.org/stable/c/dc7e0192c470a53d847c79a2796f9ac429477a26 (opens in a new tab)
- https://git.kernel.org/stable/c/0bc380beb78aa352eadbc21d934dd9606fcee808 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2023-59878 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2023-53205)Record last updated .