CVE-2022-49688

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 v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:5.18:-::::::
	cpe:2.3:o:linux:linux_kernel:5.19:rc1::::::
	cpe:2.3:o:linux:linux_kernel:5.19:rc2::::::
	cpe:2.3:o:linux:linux_kernel:5.19:rc3::::::

History

No history.

Information

Published : 2025-02-26 07:01

Updated : 2025-10-24 15:51

NVD link : CVE-2022-49688

Mitre link : CVE-2022-49688

CVE.ORG link : CVE-2022-49688

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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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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