PT-2025-41115 · Linux+2 · Linux Kernel+2

Published 2023-11-07 · Updated 2026-05-26 · CVE-2023-53671

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 versions prior to 6.1.0-rc1

Description The Linux kernel contains a flaw related to SRCU (Sub Read Copy Update). A commit assumed that CPU 0 is always online, but this is not always the case, particularly when booting a kdump kernel with the maxcpus=1 boot parameter. This can lead to the system hanging, as observed on PowerPC systems during kdump kernel boot. The issue involves delegating work to the boot CPU when using srcu size small.

Recommendations Update to a newer version of the Linux kernel that includes the fix for this vulnerability.

Exploit

Fix

Related Identifiers

ALSA-2025_16880

CVE-2023-53671

RHSA-2023:6583

RHSA-2023_6583

Affected Products

Debian

Linux Kernel

Red Hat

References · 19

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53671.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53671 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53671 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53671 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2023-53671 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53671 · Vendor Advisory
• https://git.kernel.org/stable/c/c7c0bc03fa44942fe0fdc5ac52cda6e11529c0ea · Patch
• https://osv.dev/vulnerability/BELL-CVE-2023-53671 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-53671 · Security Note
• https://git.kernel.org/stable/c/7f24626d6dd844bfc6d1f492d214d29c86d02550 · Patch
• https://git.kernel.org/stable/c/2c4d26dad76eadaa45a24543e311e9ce5d09f04e · Patch
• https://osv.dev/vulnerability/CVE-2023-53671 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2023-53671 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53671 · Security Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note