High 7.8Published Feb 18, 2026

CVE-2026-23221bus: fsl-mc: fix use-after-free in driver_override_show()

Updated under an hour ago (Oct 27, 2026, 6:23 AM ET)

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Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d before c71dfb7833db7af652ee8f65011f14c97c47405d; from 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d before c424e72cfa67e7e1477035058a8a659f2c0ea637; from 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d before b1983840287303e0dfb401b1b6cecc5ea7471e90; from 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d before dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227; 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d builds before 1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0; from 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d before a2ae33e1c6361e960a4d00f7cf75d880b54f9528; from 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d before 148891e95014b5dc5878acefa57f1940c281c431	CNA record
linux linux_kernel linux:linux_kernel	from 5.10 before 5.15.201; from 5.16 before 6.1.164; from 6.2 before 6.6.127; from 6.7 before 6.12.74; from 6.13 before 6.18.11; from 6.19 before 6.19.1	NVD

References

References

https://git.kernel.org/stable/c/c71dfb7833db7af652ee8f65011f14c97c47405d	patch
https://git.kernel.org/stable/c/c424e72cfa67e7e1477035058a8a659f2c0ea637	patch
https://git.kernel.org/stable/c/b1983840287303e0dfb401b1b6cecc5ea7471e90	patch
https://git.kernel.org/stable/c/dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227	patch
https://git.kernel.org/stable/c/1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0	patch
https://git.kernel.org/stable/c/a2ae33e1c6361e960a4d00f7cf75d880b54f9528	patch
https://git.kernel.org/stable/c/148891e95014b5dc5878acefa57f1940c281c431	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.