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Vulnerabilities

Vulnerability · CVE-2026-99136

dm-crypt: fix a tiny race condition in crypt_dec_pending

Published Oct 28, 2026 · catalog updated Nov 1, 2026 · BSI

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-99136. EPSS is 0.12%. Act only if a listed version of BSI is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.12%
Remediation
Advisory link
Affected products
Debian:12 linux · Debian:13 linux · Debian:14 linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: dm-crypt: fix a tiny race condition in crypt_dec_pending crypt_dec_pending reads io->error before calling atomic_dec_and_test. Another context, for example crypt_endio called from an interrupt, may set io->error and drop its reference between the read and the decrement. crypt_dec_pending then drops the last reference and completes the bio with the stale status - so a read that failed and was never decrypted, or a write that failed, is reported as successful. The read was placed before the decrement by commit b35f8caa0890 ("dm crypt: wait for endio to complete before destruction"), because that commit freed dm_crypt_io before calling bio_endio. This is no longer the case, dm_crypt_io lives in the per-bio data now. Read io->error after atomic_dec_and_test instead. atomic_dec_and_test is fully ordered, so no additional barrier is needed.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 linux6.1.106-1, 6.1.106-2, 6.1.106-3
  • Debian:13 linux6.12.100-1, 6.12.101-1, 6.12.105-1
  • Debian:14 linux6.12.100-1, 6.12.101-1, 6.12.105-1
  • Linux Kernel2.6.29 → 5.10.273; 5.11.0 → 5.15.224; 5.16.0 → 6.1.191

How to fix CVE-2026-99136

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-99136. EPSS is 0.12%. Act only if a listed version of BSI is installed.

Which versions are affected?

Compare what you have installed with Kernel 2.6.29 → 5.10.273; 5.11.0 → 5.15.224; 5.16.0 → 6.1.191. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.12%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 29, 2026 · BSI CERT-Bund

    Detected

    CVE-2026-99136 is listed by Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff.

  2. Nov 1, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    Kernel fixed in 5.10.273; Kernel fixed in 5.15.224; Kernel fixed in 6.1.191; Kernel fixed in 6.6.161

  3. Nov 1, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    Kernel fixed in 5.10.273; 5.11.0

  4. Nov 1, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    In the Linux kernel, the following vulnerability has been resolved: dm-crypt: fix a tiny race condition in crypt_dec_pending crypt_dec_pending reads io->error before calling atomic_dec_and_test. Another context, for example crypt_endio called from an interrupt, may set io->error and drop its reference between the read and the decrement. crypt_dec_pending then drops the last reference and completes

  5. Nov 1, 2026 · Trivy Vulnerability DB

    Updated

    In the Linux kernel, the following vulnerability has been resolved: dm-crypt: fix a tiny race condition in crypt_dec_pending crypt_dec_pending reads io->error before calling atomic_dec_and_test. Another context, for example crypt_endio called from an interrupt, may set io->error and drop its reference between the read and the decrement. crypt_dec_pending then drops the last reference and completes

Sources

  • BSI CERT-BundGovernment advisoryCVE-2026-99136

    Linux Kernel: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

    wid.cert-bund.de
  • CVE.orgVulnerability recordCVE-2026-99136

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-99136

    30-day exploitation probability 0.12%

    first.org
  • OpenSSF OSV / OSV ScannerPackage advisoryCVE-2026-99136

    dm-crypt: fix a tiny race condition in crypt_dec_pending

    osv.dev
  • Tenable CVE DatabaseVulnerability recordCVE-2026-99136

    In the Linux kernel, the following vulnerability has been resolved: dm-crypt: fix a tiny race condition in crypt_dec_pending crypt_dec_pending reads io->error before calling atomic_dec_and_test. Another context, for example crypt_endio called from an interrupt, may set io->error and drop its reference between the read and the decrement. crypt_dec_pending then drops the last reference and completes

    tenable.com
  • Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2026-99136

    In the Linux kernel, the following vulnerability has been resolved: dm-crypt: fix a tiny race condition in crypt_dec_pending crypt_dec_pending reads io->error before calling atomic_dec_and_test. Another context, for example crypt_endio called from an interrupt, may set io->error

    osv.dev

References

Freshness

Last verified in this catalog Nov 4, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 4, 2026
  • Trivy Vulnerability DBNov 1, 2026
  • Tenable CVE DatabaseNov 1, 2026
  • OpenSSF OSV / OSV ScannerNov 1, 2026
  • CVE.orgOct 30, 2026
  • BSI CERT-BundOct 30, 2026