CVE-2026-23221

Advisory lineage Upstream: 0 Downstream: 15
Analyzed
Published: 18 Feb 2026, 14:53
Last modified:11 May 2026, 22:02

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.02% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

18 Feb 2026, 14:53
Published
Vulnerability first disclosed
11 May 2026, 22:02
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • linux•linux

    ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c71dfb7833db7af652ee8f65011f14c97c47405d | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c424e72cfa67e7e1477035058a8a659f2c0ea637 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b1983840287303e0dfb401b1b6cecc5ea7471e90 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a2ae33e1c6361e960a4d00f7cf75d880b54f9528 | ≥ 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d, < c71dfb7833db7af652ee8f65011f14c97c47405d | ≥ 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d, < c424e72cfa67e7e1477035058a8a659f2c0ea637 | ≥ 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d, < b1983840287303e0dfb401b1b6cecc5ea7471e90 | ≥ 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d, < dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227 | ≥ 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d, < 1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0 | ≥ 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d, < a2ae33e1c6361e960a4d00f7cf75d880b54f9528 | ≥ 1f86a00c1159fd77e66b1bd6ff1a183f4d46f34d, < 148891e95014b5dc5878acefa57f1940c281c431 | 5.10

  • linux•linux_kernel

    ≥ 5.10, < 5.15.201 | ≥ 5.16, < 6.1.164 | ≥ 6.2, < 6.6.127 | ≥ 6.7, < 6.12.74 | ≥ 6.13, < 6.18.11 | ≥ 6.19, < 6.19.1

References (7)