CVE-2026-43463

rxrpc, afs: Fix missing error pointer check after rxrpc_kernel_lookup_peer()

MEDIUM
5.5
CVSS Score
Published: May 8, 2026 at 02:22 PM UTC
Updated: October 21, 2026 at 01:18 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.19 ≤ v < 6.19.96.7.3 ≤ v < 6.86.8 ≤ v < 6.18.1956fc740be0d39a7dba700a935f3bbfbc664e66.7.36.87.07.0 rc17.0 rc27.0 rc372904d7b9bfbf2dd146254edea93958bc35bbbfe
Vendor states this is fixed in 4245a79003adf30e67f8e9060915bd05cb31d142 (fixed)
Vendor states this is fixed in 54331c5dcc6d97683d7ca2788e7ef9c9505e1477 (fixed)
Vendor states this is fixed in d55fa7cd4b19ba91b34b307d769c149e56ad0a75 (fixed)
Vendor states this is fixed in 6.12.114 (unaffected)
Vendor states this is fixed in 6.18.19 (unaffected)
Vendor states this is fixed in 6.19.9 (unaffected)
Vendor states this is fixed in 6.8 (unaffected)
Vendor states this is fixed in 7.0 (unaffected)

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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