CVE-2022-49688 - CVE House
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Status published Medium CVE-2022-49688

afs: Fix dynamic root getattr

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: afs: Fix dynamic root getattr The recent patch to make afs_getattr consult the server didn't account for the pseudo-inodes employed by the dynamic root-type afs superblock not having a volume or a server to access, and thus an oops occurs if such a directory is stat'd. Fix this by checking to see if the vnode->volume pointer actually points anywhere before following it in afs_getattr(). This can be tested by stat'ing a directory in /afs. It may be sufficient just to do "ls /afs" and the oops looks something like: BUG: kernel NULL pointer dereference, address: 0000000000000020 ... RIP: 0010:afs_getattr+0x8b/0x14b ... Call Trace: <TASK> vfs_statx+0x79/0xf5 vfs_fstatat+0x49/0x62

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
b76ea7c06b24dcf97ea3379b6957d5b99c346ea0, dba1941f5bc3de6b460685155b89ae1182824fc8, 61a4cc41e5c1b77d05a12798f8032050aa75f3c8, 94bf8bfb009fad247d02f12e4c443411c8445412, 2aeb8c86d49967552394d5e723f87454cb53f501, 9e655a8b874d7c56e02938ddb221b16e293793df, 4.19.245, 5.4.196, 5.10.118, 5.15.42, 5.17.10, 5.18, 0, 4.19.250, 5.4.202, 5.10.127, 5.15.51, 5.18.8, 5.19

Timeline

Official Publish: February 26th, 2025
Last Modified: May 23rd, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.