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CVE PROGRAM SOURCE RECORDUnscored

CVE-2022-49688

afs: Fix dynamic root getattr

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Status
Published
Published
Updated
Assigning organization
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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • b76ea7c06b24dcf97ea3379b6957d5b99c346ea0 to < 65c24caf1b9f5b08397c6e805ec24ebc390c6e4daffected
  • dba1941f5bc3de6b460685155b89ae1182824fc8 to < e3a232e5767051483ffad4cef7d0a89d292a192baffected
  • 61a4cc41e5c1b77d05a12798f8032050aa75f3c8 to < 7b564e3254b7db5fbfbf11a824627a6c31b932b4affected
  • 94bf8bfb009fad247d02f12e4c443411c8445412 to < 2b2bba96526f25f2eba74ecadb031de2e05a83ceaffected
  • 2aeb8c86d49967552394d5e723f87454cb53f501 to < 7844ceada44eca740d31beb3d97b8511b1ca0a9baffected
  • 2aeb8c86d49967552394d5e723f87454cb53f501 to < cb78d1b5efffe4cf97e16766329dd7358aed3debaffected
  • 9e655a8b874d7c56e02938ddb221b16e293793dfaffected
  • 4.19.245 to < 4.19.250affected
  • 5.4.196 to < 5.4.202affected
  • 5.10.118 to < 5.10.127affected
  • 5.15.42 to < 5.15.51affected
  • 5.17.10 to < 5.18affected

Linux Linux

Default version status: affected

  • 5.18affected
  • 0 to < 5.18unaffected
  • 4.19.250 to ≤ 4.19.*unaffected
  • 5.4.202 to ≤ 5.4.*unaffected
  • 5.10.127 to ≤ 5.10.*unaffected
  • 5.15.51 to ≤ 5.15.*unaffected
  • 5.18.8 to ≤ 5.18.*unaffected
  • 5.19 to ≤ *unaffected

References