CVE-2025-71084

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux60d613b39e8d0c9f3b526e9c96445422b4562d76 < d5ce588a9552878859a4d44b70b724216c188a5faffected
LinuxLinuxfe454dc31e84f8c14cb8942fcb61666c9f40745b < abf38398724ecc888f62c678d288da40d11878afaffected
LinuxLinuxfe454dc31e84f8c14cb8942fcb61666c9f40745b < ab668a58c4a2ccb6d54add7a76f2f955d15d0196affected
LinuxLinuxfe454dc31e84f8c14cb8942fcb61666c9f40745b < c0acdee513239e1d6e1b490f56be0e6837dfd162affected
LinuxLinuxfe454dc31e84f8c14cb8942fcb61666c9f40745b < 5cb34bb5fd726491b809efbeb5cfd63ae5bf9cf3affected
LinuxLinuxfe454dc31e84f8c14cb8942fcb61666c9f40745b < 3ba6d01c4b3c584264dc733c6a2ecc5bbc8e0bb5affected
LinuxLinuxfe454dc31e84f8c14cb8942fcb61666c9f40745b < 57f3cb6c84159d12ba343574df2115fb18dd83caaffected
LinuxLinuxa3262b3884dd67b4c5632ce7cdf9cff9d1a575d4affected
LinuxLinux5.10.20 < 5.10.248affected
LinuxLinux5.11.3 < 5.12affected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux5.10.248 <= 5.10.*unaffected
LinuxLinux5.15.198 <= 5.15.*unaffected
LinuxLinux6.1.160 <= 6.1.*unaffected
LinuxLinux6.6.120 <= 6.6.*unaffected
LinuxLinux6.12.64 <= 6.12.*unaffected
LinuxLinux6.18.4 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References