CVE-2025-38313
In the Linux kernel, the following vulnerability has been resolved: bus: fsl-mc: fix double-free on mc_dev The blamed commit tried to simplify how the deallocations are done but, in the process, introduced a double-free on the mc_dev variable.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). 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 double-free on mc_dev The blamed commit tried to simplify how the deallocations are done but, in the process, introduced a double-free on the mc_dev variable. In case the MC device is a DPRC, a new mc_bus is allocated and the mc_dev variable is just a reference to one of its fields. In this circumstance, on the error path only the mc_bus should be freed. This commit introduces back the following checkpatch warning which is a false-positive. WARNING: kfree(NULL) is safe and this check is probably not required + if (mc_bus) + kfree(mc_bus);
- 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
- 0.17% probability · 6th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- linux/linux kernel · debian/debian linux
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/12e4431e5078847791936820bd39df9e1ee26d2ePatch
- https://git.kernel.org/stable/c/1d5baab39e5b09a76870b345cdee7933871b881fPatch
- https://git.kernel.org/stable/c/3135e03a92f6b5259d0a7f25f728e9e7866ede3fPatch
- https://git.kernel.org/stable/c/4b23c46eb2d88924b93aca647bde9a4b9cf62cf9Patch
- https://git.kernel.org/stable/c/7002b954c4a8b9965ba0f139812ee4a6f71beac8Patch
- https://git.kernel.org/stable/c/873d47114fd5e5a1cad2018843671537cc71ac84Patch
- https://git.kernel.org/stable/c/b2057374f326303c86d8423415ab58656eebc695Patch
- https://git.kernel.org/stable/c/d694bf8a9acdbd061596f3e7549bc8cb70750a60Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.