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Vulnerabilities

Vulnerability · CVE-2026-23221

In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: fix use-after-free in driver_override_show() The driver_override_show() function reads the driver_o

Published Feb 18, 2026 · catalog updated May 11, 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-2026-23221. EPSS is 0.14%. 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
None0.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.14%
Remediation
Version ranges on file
Affected products
vendor Linux Linux 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d <c424e72cfa67e7e1477035058a8a659f2c0ea637

In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: fix use-after-free in driver_override_show() The driver_override_show() function reads the driver_override string without holding the device_lock. However, driver_override_store() uses driver_set_override(), which modifies and frees the string while holding the device_lock. This can result in a concurrent use-after-free if the string is freed by the store function while being read by the show function. Fix this by holding the device_lock around the read operation.

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 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d <c424e72cfa67e7e1477035058a8a659f2c0ea6371f86a00c1159fd77e66b1bd6ff1a183f4d46f34d <c424e72cfa67e7e1477035058a8a659f2c0ea637

How to fix CVE-2026-23221

  • Upgrade

    CVE-2026-23221 lists a fix boundary at c424e72cfa67e7e1477035058a8a659f2c0ea637. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d <c424e72cfa67e7e1477035058a8a659f2c0ea637

  • 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-2026-23221. EPSS is 0.14%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d <c424e72cfa67e7e1477035058a8a659f2c0ea637 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d <c424e72cfa67e7e1477035058a8a659f2c0ea637. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.14%. 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: bus: fsl-mc: fix use-after-free in driver_override_show() The driver_override_show() function reads the driver_override string without holding the device_lock. However, driver_override_store() uses driver_set_override(), which modifies and frees the string while holding the device_lock. This can result in a concurrent use-after-fr

  2. May 11, 2026 · EUVD

    Updated

    In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: fix use-after-free in driver_override_show() The driver_override_show() function reads the driver_override string without holding the device_lock. However, driver_override_store() uses driver_set_override(), which modifies and frees the string while holding the device_lock. This can result in a concurrent use-after-fr

Sources

  • CVE.orgVulnerability recordCVE-2026-23221

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-23221

    30-day exploitation probability 0.14%

    first.org
  • EUVDVulnerability recordEUVD-2026-7680

    In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: fix use-after-free in driver_override_show() The driver_override_show() function reads the driver_override string without holding the device_lock. However, driver_override_store() uses driver_set_ove

    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