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Linux KernelOperating system · Linux

CVE-2025-71084

MEDIUM · 5.5 CVSS v3.1 Published 2026-01-13
Fix available
A fix is available. Upgrade to 5.10.248 / 5.12 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 5.10.20, < 5.10.248>= 5.11.3, < 5.12>= 5.12.1, < 5.15.198>= 5.16, < 6.1.160>= 6.2, < 6.6.120>= 6.7, < 6.12.64>= 6.13, < 6.18.4= 5.12= 6.19

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 5.10.248 / 5.12 / 5.15.198 or later
Fixed in 5.10.2485.125.15.198
Vendor patch git.kernel.org →
Recommended fix High confidence

6.1.160 (or 5.15.198 for 5.15.x, or 5.10.248 for 5.10.x)

  1. Identify the currently running Linux kernel version using `uname -r`
  2. Compare against the affected version ranges: >= 5.10.20 and < 5.10.248; >= 5.11.3 and < 5.12; >= 5.12.1 and < 5.15.198; >= 5.16 and < 6.1.160
  3. If running an affected version, plan for a kernel upgrade to a fixed release
  4. For kernels in the 5.10.x branch, upgrade to 5.10.248 or later
  5. For kernels in the 5.15.x branch, upgrade to 5.15.198 or later
  6. For kernels in the 6.1.x branch, upgrade to 6.1.160 or later
  7. Apply the kernel upgrade via standard distribution package manager (e.g., `apt-get dist-upgrade`, `yum update`, or distribution-specific kernel package)
  8. Reboot the system to load the fixed kernel
Caveat Kernel upgrades may require reboot and could introduce compatibility issues with custom modules or older drivers; ensure backup and test in staging if possible

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-71084 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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