CVE-2022-49688

MEDIUM EPSS 20.0%
Published Feb 26, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
20.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥4.19.245  –  <4.19.250
linuxlinux_kernel*≥5.4.196  –  <5.4.202
linuxlinux_kernel*≥5.10.118  –  <5.10.127
linuxlinux_kernel*≥5.15.42  –  <5.15.51
linuxlinux_kernel*≥5.17.10  –  <5.18
linuxlinux_kernel*≥5.18.1  –  <5.18.8
linuxlinux_kernel5.18any
linuxlinux_kernel5.19any
linuxlinux_kernel5.19any
linuxlinux_kernel5.19any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/2b2bba96526f25f2eba74ecadb031de2e05a83ce
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/65c24caf1b9f5b08397c6e805ec24ebc390c6e4d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7844ceada44eca740d31beb3d97b8511b1ca0a9b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7b564e3254b7db5fbfbf11a824627a6c31b932b4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cb78d1b5efffe4cf97e16766329dd7358aed3deb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e3a232e5767051483ffad4cef7d0a89d292a192b
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2b2bba96526f25f2eba74ecadb031de2e05a83ce
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/65c24caf1b9f5b08397c6e805ec24ebc390c6e4d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7844ceada44eca740d31beb3d97b8511b1ca0a9b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7b564e3254b7db5fbfbf11a824627a6c31b932b4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cb78d1b5efffe4cf97e16766329dd7358aed3deb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e3a232e5767051483ffad4cef7d0a89d292a192b
    Patch