CVE-2022-49688

afs: Fix dynamic root getattr

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

N/A

CVSS

Severity:

EPSS 0.05%

Affected: Linux Linux

References

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

Frequently Asked Questions

What is the severity of CVE-2022-49688?: CVE-2022-49688 has not yet been assigned a CVSS score.
How to fix CVE-2022-49688?: To fix CVE-2022-49688, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49688 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-49688 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49688?: CVE-2022-49688 affects Linux Linux, Linux Linux.

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