Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

CVE record · CVE-2026-63806

KVM: Replace guest-triggerable BUG_ON() in ioeventfd datamatch with get_unaligned()

CVSS 7.1 HighEPSS 0.0016 · 4th percentile

Published by the CVE Program (CNA: Linux) at 19 Jul 2026, 12:02 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Linux Linux
  • affected d34e6b175e61821026893ec5298cc8e7558df43a to before 2426c15c1395b7d5ccf1e5025ca898af7f3decb6 git
  • affected d34e6b175e61821026893ec5298cc8e7558df43a to before 4186c850789906b875a1d263377a4d37c078e317 git
  • affected d34e6b175e61821026893ec5298cc8e7558df43a to before 36ff44fb3d89960391e013fb9d91e23dbc48be47 git
  • affected d34e6b175e61821026893ec5298cc8e7558df43a to before 92fc631b69deb1c7d56aec2663003600799dcd75 git
  • affected d34e6b175e61821026893ec5298cc8e7558df43a to before bf89e3738480d33cd515b4a18900e8443d40cd2e git
  • affected d34e6b175e61821026893ec5298cc8e7558df43a to before 5da9b1a87ec7cc3489c27016313524769f12d9e0 git
  • affected d34e6b175e61821026893ec5298cc8e7558df43a to before 5c87b47374682f69686068ad0a7779365a527b1c git
  • affected d34e6b175e61821026893ec5298cc8e7558df43a to before f1edbed787ba67988ed34e0132ca128b052b6ce8 git
Other versions: unaffected
Linux Linux
  • affected 2.6.32
  • unaffected before 2.6.32 semver
  • unaffected 5.10.261 to 5.10.*, inclusive semver
  • unaffected 5.15.212 to 5.15.*, inclusive semver
  • unaffected 6.1.178 to 6.1.*, inclusive semver
  • unaffected 6.6.145 to 6.6.*, inclusive semver
  • unaffected 6.12.95 to 6.12.*, inclusive semver
  • unaffected 6.18.38 to 6.18.*, inclusive semver
  • unaffected 7.1.3 to 7.1.*, inclusive semver
  • unaffected 7.2 to *, inclusive original_commit_for_fix
Other versions: affected
Identifiers
CVE-2026-63806
CNA
Linux
Weakness (CWE)
CWE-400
Tags
Published
19 Jul 2026
Updated
19 Oct 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.1 High 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CNA (Linux)
  • CISA KEV Not listed.
  • EPSS 0.0016, the 4th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 19 Jul 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.