PT-2025-18637 · Linux+2 · Linux Kernel+2
Published
2023-05-09
·
Updated
2025-05-02
·
CVE-2022-49920
CVSS v3.1
4.7
Medium
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A vulnerability in the Linux kernel's netfilter: nf tables has been identified. The issue involves the netlink notifier, which could potentially race to release objects. This occurs because the commit release path, invoked via
call rcu(), runs without locking to release objects after the rcu grace period. As a result, the netlink notifier handler might remove objects that the transaction context still references from the commit release path. To address this, rcu barrier() should be called to ensure that pending rcu callbacks run to completion if the list of transactions to be destroyed is not empty.Recommendations
For the Linux kernel, to resolve this issue, call
rcu barrier() to ensure pending rcu callbacks run to completion if the list of transactions to be destroyed is not empty. As a temporary workaround, consider restricting access to the netlink notifier handler until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.Exploit
Race Condition
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Red Hat