PT-2025-41039 · Linux+3 · Linux Kernel+3
Published
2022-12-08
·
Updated
2025-12-04
·
CVE-2022-50534
CVSS v2.0
6.0
Medium
| Vector | AV:L/AC:H/Au:S/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The Linux kernel contains a flaw within the dm thin pool btree lookup code that can lead to a softlockup. This issue arises from corrupted metadata, potentially causing an infinite loop during data block lookups. Specifically, a broken btree can be created with a mix of fresh and stale nodes. This occurs when a transaction updates some btree nodes on disk, but the write operation for other nodes fails, leading to a commit failure and the thin pool becoming read-only. The
pmd->root may then point to the broken btree, causing the system to get trapped in a loop while looking up data blocks. The fix involves ensuring that pmd->root is set in open metadata() to use the last transaction's pmd->root if the commit fails.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Infinite Loop
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Weakness Enumeration
Related Identifiers
Affected Products
Centos
Linux Kernel
Red Hat
Suse