PT-2025-8632 · Linux+3 · Linux Kernel+3

Brian Foster + 1 · Published 2022-06-20 · Updated 2026-05-26 · CVE-2022-49699

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 issue in the Linux kernel has been identified where a read can race with an invalidation followed by another read, potentially replacing a folio with a higher-order folio. This can lead to a NULL pointer dereference while holding the RCU read lock. The problem occurs when a sibling entry for the new folio is encountered in the next iteration of the loop.

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

Exploit

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

AZL-68802

BDU:2026-03997

CVE-2022-49699

RHSA-2023:6583

RHSA-2023_6583

SUSE-SU-2025:1027-1

SUSE-SU-2025:1176-1

SUSE-SU-2025:1183-1

SUSE-SU-2025:1241-1

SUSE-SU-2025_1027-1

SUSE-SU-2025_1241-1

Affected Products

Astra Linux

Linux Kernel

Red Hat

Suse

References · 1334

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49699.json · Exploit
• https://bdu.fstec.ru/vul/2026-03997 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49699 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49699 · Security Note
• https://git.kernel.org/stable/c/a66f131d30e53000f08301776bf85c912ef47aad · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:1176-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-49699 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1183-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49699 · Security Note
• https://ubuntu.com/security/CVE-2022-49699 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2022-49699 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1027-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49699 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49699 · Vendor Advisory
• https://git.kernel.org/stable/c/cb995f4eeba9d268fd4b56c2423ad6c1d1ea1b82 · Patch