PT-2025-8633 · Linux+4 · Linux Kernel+4
Jann Horn
·
Published
2022-06-13
·
Updated
2025-04-15
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CVE-2022-49700
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A vulnerability in the Linux kernel has been identified, related to the slab allocation mechanism. The issue arises from a race condition between slab allocation and deallocation, which can lead to state inconsistency and potentially cause an object to be lost or freed onto the wrong slab's freelist. This inconsistency can result in the
inuse counter being messed up, eventually causing a page to be freed to the page allocator while it still contains slab objects. The vulnerability is based on a complex sequence of operations, including the fastpath in slab alloc node() and the slab alloc() function, where the TID is not updated when deactivating the CPU slab.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Double Free
Use After Free
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Related Identifiers
Affected Products
Astra Linux
Centos
Linux Kernel
Red Hat
Suse