PT-2025-8384 · Linux+1 · Linux Kernel+1

Marc Dionne · Published 2025-02-26 · Updated 2025-04-11 · CVE-2022-49450

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base 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 (affected versions not specified)

Description A bug in the Linux kernel's AF RXRPC listen() handler allows the backlog to be set too high, causing an oops when the socket is closed. This happens because the preallocation circular buffers have 32 slots, but one slot must be a dead slot due to the use of CIRC CNT(). As a result, listen(rxrpc sock, 32) will cause a kernel NULL pointer dereference when the socket is closed. The issue is resolved by setting the maximum backlog to RXRPC BACKLOG MAX - 1 to match the ring capacity.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2022-49450

OESA-2025-1408

Affected Products

Astra Linux

Linux Kernel

References · 47

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49450.json · Exploit
• https://cve.org/CVERecord?id=CVE-2022-49450 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-52988 · Security Note
• https://git.kernel.org/stable/c/616f76498d5ddf26b997caf64a95cda3c8a55533 · Patch
• https://git.kernel.org/stable/c/e198f1930050e3115c80b67d9249f80f98a27c67 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-49451 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-49313 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-49441 · Security Note
• https://osv.dev/vulnerability/OESA-2025-1408 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49467 · Security Note
• https://git.kernel.org/stable/c/91b34bf0409f43bb60453bab23c5beadd726d022 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49450 · Vendor Advisory
• https://git.kernel.org/stable/c/88e22159750b0d55793302eeed8ee603f5c1a95c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-49396 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-49370 · Security Note