CVE-2024-53080: drm/panthor: Lock XArray when getting entries for the VM
In the Linux kernel, the following vulnerability has been resolved:
drm/panthor: Lock XArray when getting entries for the VM
Similar to commit cac075706f29 ("drm/panthor: Fix race when converting
group handle to group object") we need to use the XArray's internal
locking when retrieving a vm pointer from there.
v2: Removed part of the patch that was trying to protect fetching
the heap pointer from XArray, as that operation is protected by
the @pool->lock.
Security readout for executives and security teams
Plain-English summary
A locking error in the Linux Panthor graphics driver could let a low-privileged local user trigger unsafe access to a virtual-memory object. Successful exploitation could compromise data, alter system state, or crash the host. The supplied CVSS score is 7.8. Exposure depends on the affected kernel code and Panthor driver being present and reachable.
Executive priority
Prioritize affected shared-compute, multi-user, and untrusted-workload systems. Treat this as a high-severity local privilege-boundary risk, not an established remote emergency. Complete inventory promptly and schedule vendor-approved kernel updates according to exposure; lower priority is reasonable where Panthor is absent or inaccessible.
Technical view
The driver retrieved a VM pointer from an XArray without using the XArray’s internal locking, creating a race condition. The kernel fix adds locking around that lookup; heap retrieval remains protected separately by pool->lock. The supplied sources do not establish the resulting corruption primitive or reliably map every fixed kernel release.
Likely exposure
Most relevant to Linux systems running affected 6.10–6.12-era kernel code with the Panthor DRM driver available. The CVSS vector indicates exploitation requires local access and low privileges, without user interaction. The supplied version data is ambiguous, so distribution-specific kernel advisories and backport status should determine actual exposure.
Exploitation context
The supplied record is not marked as CISA KEV and provides no evidence of active exploitation. Its local attack vector limits remote exposure, but environments allowing untrusted local workloads, shared users, or application code execution deserve priority because successful exploitation is scored for high confidentiality, integrity, and availability impact.
Researcher notes
The core defect is an unlocked XArray VM lookup, analogous to an earlier Panthor handle-conversion race. Two stable commits are referenced, likely reflecting branch-specific backports. The bundle does not specify CWE, crash traces, exploit reliability, affected hardware, or confirmed exploitation. Avoid inferring a particular memory-corruption class without reviewing the linked technical issue and patches.
Mitigation direction
Update to a vendor-supported kernel containing the applicable stable fix.
Confirm backport status using the Linux stable commits and distribution advisory.
Restrict untrusted local code execution on potentially affected systems until patched.
Check vendor guidance before applying any workaround not named by the sources.
Validation and detection
Record each system’s running kernel version and distribution build identifier.
Determine whether the Panthor DRM driver is enabled, loaded, or reachable.
Verify vendor changelogs include the applicable referenced stable commit.
Reboot into the corrected kernel and confirm the active version.
Run standard graphics and workload regression tests after updating.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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CVSS vector scores
1 official score
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