PT-2024-11861 · Linux · Linux Kernel

Published 2022-11-24 · Updated 2026-04-20 · CVE-2022-48998

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.1.0-rc4+

Description The issue is related to a problem encountered with tests added by a specific commit, which causes a tentative to write above the stack. This happens because a tail call is done to a BPF program with a different stack depth, resulting in an erroneous increase of a register value. The problem was resolved by using a register to carry the tail call count during the tail call and saving it into the stack at function entry if required.

Recommendations For Linux kernel versions prior to 6.1.0-rc4+, update to a newer version that includes the fix for this issue. As a temporary workaround, consider disabling the test bpf module until a patch is available. Restrict access to the vulnerable powerpc/bpf/32 module to minimize the risk of exploitation. Avoid using the tail call feature in the affected API endpoints until the issue is resolved.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2025-07470

CVE-2022-48998

Affected Products

Linux Kernel

References · 17

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/48xxx/CVE-2022-48998.json · Exploit
• https://git.kernel.org/stable/c/89d21e259a94f7d5582ec675aa445f5a79f347e4 · Patch
• https://security-tracker.debian.org/tracker/CVE-2022-48998 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-48998 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-48998 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2022-48998 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-48998 · Vendor Advisory
• https://git.kernel.org/stable/c/747a6e547240baaaf41874d27333b87b87cfd24c · Patch
• https://bdu.fstec.ru/vul/2025-07470 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-48998 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-48998 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-48998 · Vendor Advisory
• https://git.kernel.org/linus/89d21e259a94f7d5582ec675aa445f5a79f347e4 · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://twitter.com/CVEnew/status/1848670046106812753 · Twitter Post