boxscore/security
CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2023-53205HIGH
Linux Linux — KVM: s390/diag: fix racy access of physical cpu number in diag 9c handler
  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  H  H  H    7.8   .0017    6.3     —
AFFECTED
  Product  Versions                                    Fixed
  Linux    87e28a15c42cc592009c32a8c20e5789059027c2 –  —
  Linux    5.13 –                                      5.15.121
TIMELINE
  Sep 15  Reserved by Linux
  Sep 15  Published (CNA: Linux)
  Aug 4   RESCORED — CVE-2023-53205 (Linux). CVSS 7.3 → 7.8 (NVD).
CWE-787 · CNA: Linux · CVSS v3.1 · 4 references · NVD status: Modified

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.

Lifecycle

Complete event history — 3 events, chronological
DateEventDetail
September 15, 2025ReservedReserved by Linux
September 15, 2025PublishedPublished (CNA: Linux)
August 4, 2026RESCOREDRESCORED — CVE-2023-53205 (Linux). CVSS 7.3 → 7.8 (NVD).

Affected

Affected products and packages — 2 rows
VendorProduct / PackageEcosystemVersion introducedFixed
LinuxLinux87e28a15c42cc592009c32a8c20e5789059027c2
LinuxLinux5.135.15.121

Weaknesses

CWE-787

References (4)

Related

Authoritative record: CVE-2023-53205 at cve.org

Vendors: linux

Weaknesses: CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-53205 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.