CVE-2022-49688 (GCVE-0-2022-49688)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:24 – Updated: 2026-05-11 19:04
VLAI?
Title
afs: Fix dynamic root getattr
Summary
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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b76ea7c06b24dcf97ea3379b6957d5b99c346ea0 , < 65c24caf1b9f5b08397c6e805ec24ebc390c6e4d (git)
Affected: dba1941f5bc3de6b460685155b89ae1182824fc8 , < e3a232e5767051483ffad4cef7d0a89d292a192b (git)
Affected: 61a4cc41e5c1b77d05a12798f8032050aa75f3c8 , < 7b564e3254b7db5fbfbf11a824627a6c31b932b4 (git)
Affected: 94bf8bfb009fad247d02f12e4c443411c8445412 , < 2b2bba96526f25f2eba74ecadb031de2e05a83ce (git)
Affected: 2aeb8c86d49967552394d5e723f87454cb53f501 , < 7844ceada44eca740d31beb3d97b8511b1ca0a9b (git)
Affected: 2aeb8c86d49967552394d5e723f87454cb53f501 , < cb78d1b5efffe4cf97e16766329dd7358aed3deb (git)
Affected: 9e655a8b874d7c56e02938ddb221b16e293793df (git)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 4.19.250 , ≤ 4.19.* (semver)
Unaffected: 5.4.202 , ≤ 5.4.* (semver)
Unaffected: 5.10.127 , ≤ 5.10.* (semver)
Unaffected: 5.15.51 , ≤ 5.15.* (semver)
Unaffected: 5.18.8 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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Puede ser suficiente con hacer \\\"ls /afs\\\" y el error se ver\u00e1 as\u00ed: ERROR: desreferencia de puntero NULL del n\u00facleo, direcci\u00f3n: 0000000000000020 ... RIP: 0010:afs_getattr+0x8b/0x14b ... 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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.