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_override string without holding the device_lock.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.12%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.12% probability · 2th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/148891e95014b5dc5878acefa57f1940c281c431Patch
- https://git.kernel.org/stable/c/1d6bd6183e723a7b256ff34bbb5b498b5f4f2ec0Patch
- https://git.kernel.org/stable/c/a2ae33e1c6361e960a4d00f7cf75d880b54f9528Patch
- https://git.kernel.org/stable/c/b1983840287303e0dfb401b1b6cecc5ea7471e90Patch
- https://git.kernel.org/stable/c/c424e72cfa67e7e1477035058a8a659f2c0ea637Patch
- https://git.kernel.org/stable/c/c71dfb7833db7af652ee8f65011f14c97c47405dPatch
- https://git.kernel.org/stable/c/dd8ba8c0c3f3916d4ee1e3a09da9cd5caff5d227Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.