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CVE record · CVE-2026-89557

md: do overflow check for sb->bblog_shift in super_1_load()

CVSS 7.8 HighEPSS 0.0017 · 6th percentile

Published by the CVE Program (CNA: Linux) at 11 Sept 2026, 19:44 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 2699b67223aca6b1450fc2f72e40fada952afc85 to before 94c820d99a4305d4ded41a97ed37ec7d26c56e7f git
  • affected 2699b67223aca6b1450fc2f72e40fada952afc85 to before 573fb68105fdc6a127ba6069e58a0d2aff3c9f93 git
  • affected 2699b67223aca6b1450fc2f72e40fada952afc85 to before 323f3a056dbccb39a642ebde642044a680f3a6d6 git
  • affected 2699b67223aca6b1450fc2f72e40fada952afc85 to before 0a03f9541c06fda64301dcf94f376f07ce2cc396 git
  • affected 2699b67223aca6b1450fc2f72e40fada952afc85 to before 75d15738fd33a782606d0dc80cfeff47edf2ddd8 git
  • affected 2699b67223aca6b1450fc2f72e40fada952afc85 to before 3b097416b4cff77285c1f472fc2c4058d8a7554f git
  • affected 2699b67223aca6b1450fc2f72e40fada952afc85 to before df7d4d011d5ace20699ea948712f09f9ac08924f git
  • affected 2699b67223aca6b1450fc2f72e40fada952afc85 to before 35d522bd32462afcf1981dab6da8a9256c26c1e0 git
Other versions: unaffected
Linux Linux
  • affected 3.1
  • unaffected before 3.1 semver
  • unaffected 5.10.270 to 5.10.*, inclusive semver
  • unaffected 5.15.221 to 5.15.*, inclusive semver
  • unaffected 6.1.188 to 6.1.*, inclusive semver
  • unaffected 6.6.157 to 6.6.*, inclusive semver
  • unaffected 6.12.109 to 6.12.*, inclusive semver
  • unaffected 6.18.50 to 6.18.*, inclusive semver
  • unaffected 7.2.4 to 7.2.*, inclusive semver
  • unaffected 7.3 to *, inclusive original_commit_for_fix
Other versions: affected
Identifiers
CVE-2026-89557
CNA
Linux
Tags
Published
11 Sept 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
7.8 High 3.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CNA (Linux)
  • CISA KEV Not listed.
  • EPSS 0.0017, the 6th percentile, on 14 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 11 Sept 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.