GHSA-q8q5-8hv7-m52rMediumCVSS 5.5
In the Linux kernel, the following vulnerability has been resolved: RDMA/cm: Fix leaking the...
🔗 CVE IDs covered (1)
📋 Description
In the Linux kernel, the following vulnerability has been resolved:
RDMA/cm: Fix leaking the multicast GID table reference
If the CM ID is destroyed while the CM event for multicast creating is still queued the cancel_work_sync() will prevent the work from running which also prevents destroying the ah_attr. This leaks a refcount and triggers a WARN:
GID entry ref leak for dev syz1 index 2 ref=573 WARNING: CPU: 1 PID: 655 at drivers/infiniband/core/cache.c:809 release_gid_table drivers/infiniband/core/cache.c:806 [inline] WARNING: CPU: 1 PID: 655 at drivers/infiniband/core/cache.c:809 gid_table_release_one+0x284/0x3cc drivers/infiniband/core/cache.c:886
Destroy the ah_attr after canceling the work, it is safe to call this twice.
🔗 References (9)
- https://nvd.nist.gov/vuln/detail/CVE-2025-71084
- https://git.kernel.org/stable/c/3ba6d01c4b3c584264dc733c6a2ecc5bbc8e0bb5
- https://git.kernel.org/stable/c/57f3cb6c84159d12ba343574df2115fb18dd83ca
- https://git.kernel.org/stable/c/5cb34bb5fd726491b809efbeb5cfd63ae5bf9cf3
- https://git.kernel.org/stable/c/ab668a58c4a2ccb6d54add7a76f2f955d15d0196
- https://git.kernel.org/stable/c/c0acdee513239e1d6e1b490f56be0e6837dfd162
- https://git.kernel.org/stable/c/abf38398724ecc888f62c678d288da40d11878af
- https://git.kernel.org/stable/c/d5ce588a9552878859a4d44b70b724216c188a5f
- https://github.com/advisories/GHSA-q8q5-8hv7-m52r