CVE-2025-71084
Published: January 18, 2026Last modified: January 18, 2026
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.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.161-r0) |
| 25 LTS | linux-lts | Fixed (6.12.65-r0) | |
| Stream | linux-lts | Fixed (6.12.65-r0) |
References
- 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/abf38398724ecc888f62c678d288da40d11878af
- https://git.kernel.org/stable/c/c0acdee513239e1d6e1b490f56be0e6837dfd162
- https://git.kernel.org/stable/c/d5ce588a9552878859a4d44b70b724216c188a5f