PT-2025-8582 · Linux+2 · Linux Kernel+2
Juergen Gross
·
Published
2025-02-26
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Updated
2025-04-16
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CVE-2022-49649
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to the version that includes the fix for the issue in xen/netback
Description
The issue arises in the Linux kernel when the
xenvif rx next skb() function is called with an empty rx queue. This can occur if the loop in xenvif rx action() performs multiple iterations without checking the availability of another skb in the rx queue, leading to crashes due to a NULL pointer dereference. The problem is resolved by stopping the loop when the rx queue becomes empty.Recommendations
For Linux kernel versions prior to the fixed version, consider applying the patch that stops the loop in
xenvif rx action() when the rx queue is empty to prevent crashes.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.Exploit
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Suse