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Vulnerabilities

Vulnerability · CVE-2026-23226

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing

Published Feb 18, 2026 · catalog updated Oct 30, 2026 · Linux Linux

Last checked Nov 12, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-23226. EPSS is 0.51%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.51%
Remediation
Version ranges on file
Affected products
vendor Linux Linux 1d9c4172110e645b383ff13eee759728d74f1a5d <4f3a06cc57976cafa8c6f716646be6c79a99e485

In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

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.

  • vendor Linux Linux 1d9c4172110e645b383ff13eee759728d74f1a5d <4f3a06cc57976cafa8c6f716646be6c79a99e4851d9c4172110e645b383ff13eee759728d74f1a5d <4f3a06cc57976cafa8c6f716646be6c79a99e485

How to fix CVE-2026-23226

  • Upgrade

    CVE-2026-23226 lists a fix boundary at 4f3a06cc57976cafa8c6f716646be6c79a99e485. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 1d9c4172110e645b383ff13eee759728d74f1a5d <4f3a06cc57976cafa8c6f716646be6c79a99e485

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

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-2026-23226. EPSS is 0.51%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux 1d9c4172110e645b383ff13eee759728d74f1a5d <4f3a06cc57976cafa8c6f716646be6c79a99e485 1d9c4172110e645b383ff13eee759728d74f1a5d <4f3a06cc57976cafa8c6f716646be6c79a99e485. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.51%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

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

Timeline

Detection, updates, and resolution for this record.

  1. Feb 18, 2026 · EUVD

    Detected

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

  2. Oct 30, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw_semaphore chann_lock to struct ksmbd_session and protects all xa_load/xa_store/xa_erase accesses.

Sources

  • CVE.orgVulnerability recordCVE-2026-23226

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-23226

    30-day exploitation probability 0.51%

    first.org
  • EUVDVulnerability recordEUVD-2026-7675

    In the Linux kernel, the following vulnerability has been resolved: ksmbd: add chann_lock to protect ksmbd_chann_list xarray ksmbd_chann_list xarray lacks synchronization, allowing use-after-free in multi-channel sessions (between lookup_chann_list() and ksmbd_chann_del). Adds rw

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 12, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 9, 2026
  • CVE.orgNov 6, 2026
  • EUVDNov 5, 2026