EUVD-2026-28769
GHSA-qc73-3qqx-fc2q
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
4DescriptionNVD
In the Linux kernel, the following vulnerability has been resolved:
rxrpc, afs: Fix missing error pointer check after rxrpc_kernel_lookup_peer()
rxrpc_kernel_lookup_peer() can also return error pointers in addition to NULL, so just checking for NULL is not sufficient.
Fix this by:
(1) Changing rxrpc_kernel_lookup_peer() to return -ENOMEM rather than NULL on allocation failure.
(2) Making the callers in afs use IS_ERR() and PTR_ERR() to pass on the error code returned.
AnalysisAI
Null pointer dereference in the Linux kernel's rxrpc and AFS subsystems allows a local authenticated attacker to trigger a kernel denial of service. The rxrpc_kernel_lookup_peer() function can return either NULL or an error pointer on failure, but its AFS callers only tested for NULL - leaving unchecked error pointer values that, when dereferenced, cause a kernel panic. …
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