PT-2025-8437 · Linux+3 · Linux Kernel+3

Published 2022-01-01 · Updated 2026-05-26 · CVE-2022-49504

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 vulnerability in the Linux kernel has been identified, specifically in the scsi: lpfc component. The issue occurs when an external loopback plug is inserted and then removed, followed by the insertion of a normal cable directly connected to a target device. This sequence of events can cause the system to crash in the llpfc set rrq active() routine. The problem arises from a mix-up in reference counting, leading to the completion of a new FLOGI releasing the fabric ndlp, and the subsequent completion of the original ABTS referencing the released ndlp, resulting in a system crash. The issue is resolved by no-op'ing the ABTS when in loopback mode.

Recommendations As a temporary workaround, consider disabling the llpfc set rrq active() function until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

ALSA-2025_16880

AZL-68624

BDU:2026-02065

CVE-2022-49504

OPENSUSE-SU-2025_1263-1

RHSA-2022:8267

RHSA-2022_8267

SUSE-SU-2025:01600-1

SUSE-SU-2025:1027-1

SUSE-SU-2025:1176-1

SUSE-SU-2025:1183-1

SUSE-SU-2025:1194-1

SUSE-SU-2025:1241-1

SUSE-SU-2025:1263-1

SUSE-SU-2025_01600-1

SUSE-SU-2025_1027-1

SUSE-SU-2025_1241-1

SUSE-SU-2025_1263-1

Affected Products

Debian

Linux Kernel

Red Hat

Suse

References · 1473

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49504.json · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49504 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-49504 · Vendor Advisory
• https://osv.dev/vulnerability/AZL-68624 · Vendor Advisory
• https://git.kernel.org/stable/c/ead76d4c09b89f4c8d632648026a476a5a34fde8 · Patch
• https://security-tracker.debian.org/tracker/CVE-2022-49504 · Vendor Advisory
• https://git.kernel.org/stable/c/a1516930cb605caee3bc7b4f3b7994b88c0b8505 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49504 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1176-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1183-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2022-49504 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1194-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-02065 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:1263-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2022-49504 · Vendor Advisory