CVE-2022-49688
afs: Fix dynamic root getattr
- Published
- Updated
- Reserved
- Assigned by
- Linux
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
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.30% · top 77% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected b76ea7c06b24dcf97ea3379b6957d5b99c346ea0 – < 65c24caf1b9f5b08397c6e805ec24ebc390c6e4d
- affected dba1941f5bc3de6b460685155b89ae1182824fc8 – < e3a232e5767051483ffad4cef7d0a89d292a192b
- affected 61a4cc41e5c1b77d05a12798f8032050aa75f3c8 – < 7b564e3254b7db5fbfbf11a824627a6c31b932b4
- affected 94bf8bfb009fad247d02f12e4c443411c8445412 – < 2b2bba96526f25f2eba74ecadb031de2e05a83ce
- affected 2aeb8c86d49967552394d5e723f87454cb53f501 – < 7844ceada44eca740d31beb3d97b8511b1ca0a9b
- affected 2aeb8c86d49967552394d5e723f87454cb53f501 – < cb78d1b5efffe4cf97e16766329dd7358aed3deb
- affected 9e655a8b874d7c56e02938ddb221b16e293793df
- affected 4.19.245 – < 4.19.250
- affected 5.4.196 – < 5.4.202
- affected 5.10.118 – < 5.10.127
- affected 5.15.42 – < 5.15.51
- affected 5.17.10 – < 5.18
- affected 5.18
- unaffected < 5.18
- unaffected 4.19.250 – ≤ 4.19.*
- unaffected 5.4.202 – ≤ 5.4.*
- unaffected 5.10.127 – ≤ 5.10.*
- unaffected 5.15.51 – ≤ 5.15.*
- unaffected 5.18.8 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (6)
- https://git.kernel.org/stable/c/65c24caf1b9f5b08397c6e805ec24ebc390c6e4d (opens in a new tab)
- https://git.kernel.org/stable/c/e3a232e5767051483ffad4cef7d0a89d292a192b (opens in a new tab)
- https://git.kernel.org/stable/c/7b564e3254b7db5fbfbf11a824627a6c31b932b4 (opens in a new tab)
- https://git.kernel.org/stable/c/2b2bba96526f25f2eba74ecadb031de2e05a83ce (opens in a new tab)
- https://git.kernel.org/stable/c/7844ceada44eca740d31beb3d97b8511b1ca0a9b (opens in a new tab)
- https://git.kernel.org/stable/c/cb78d1b5efffe4cf97e16766329dd7358aed3deb (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49688)Record last updated .