Reachable assertion in Linux kernel - CVE-2025-21654

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU103039

Reachable assertion in Linux kernel - CVE-2025-21654

Published: January 20, 2025 / Updated: May 11, 2025


Vulnerability identifier: #VU103039
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-21654
CWE-ID: CWE-617
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to reachable assertion within the ovl_connect_layer(), ovl_check_encode_origin(), ovl_dentry_to_fid() and ovl_encode_fh() functions in fs/overlayfs/export.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Ubuntu
openEuler
bpftool
kernel
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
linux (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure-nvidia (Ubuntu package)
linux-gke (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-azure (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-realtime (Ubuntu package)
linux-image-generic-64k-hwe-24.04 (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic-hwe-24.04 (Ubuntu package)
linux-image-oem-24.04 (Ubuntu package)
linux-image-oem-24.04a (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-virtual-hwe-24.04 (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-6.11.0-21-generic (Ubuntu package)
linux-image-6.11.0-21-generic-64k (Ubuntu package)
linux-image-6.11.0-1007-realtime (Ubuntu package)
linux-image-realtime-hwe-24.04 (Ubuntu package)
linux-image-realtime (Ubuntu package)
linux-image-6.11.0-1010-raspi (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-gcp-64k (Ubuntu package)
linux-image-6.11.0-1011-gcp-64k (Ubuntu package)
linux-image-6.11.0-1011-gcp (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-6.11.0-1011-aws (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-6.11.0-1011-lowlatency-64k (Ubuntu package)
linux-image-6.11.0-1011-lowlatency (Ubuntu package)
linux-image-lowlatency-hwe-24.04 (Ubuntu package)
linux-image-lowlatency-64k-hwe-24.04 (Ubuntu package)
linux-image-6.11.0-1012-azure (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-6.11.0-1012-azure-fde (Ubuntu package)
linux-image-oracle-64k (Ubuntu package)
linux-image-6.11.0-1013-oracle (Ubuntu package)
linux-image-6.11.0-1013-oracle-64k (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-oem-24.04b (Ubuntu package)
linux-image-6.11.0-1017-oem (Ubuntu package)

How to mitigate CVE-2025-21654

Install update from vendor's website.

Linux kernel - addressed in versions 6.6.72, 6.6.73, 6.6.74, 6.12.10, 6.13
bpftool - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
kernel - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
python3-perf-debuginfo - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
python3-perf - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
perf-debuginfo - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
perf - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
kernel-tools-devel - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
kernel-tools-debuginfo - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
kernel-tools - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
kernel-source - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
kernel-headers - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
kernel-devel - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
kernel-debugsource - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
kernel-debuginfo - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
bpftool-debuginfo - addressed in versions 6.6.0-83.0.0.77, 6.6.0-83.0.0.88
linux (Ubuntu package) - addressed in versions 6.8.0-60.63, 6.8.0-60.63.1, 6.8.0-60.63.1~22.04.1, 6.8.0-1026.26, 6.8.0-1026.27, 6.8.0-1029.31, 6.8.0-1029.31~22.04.1
linux-hwe-6.8 (Ubuntu package) - update to 6.8.0-60.63~22.04.1
linux-gcp (Ubuntu package) - addressed in versions 6.8.0-1012.14, 6.8.0-1030.32, 6.8.0-1030.32~22.04.1
linux-azure-nvidia (Ubuntu package) - update to 6.8.0-1016.17
linux-gke (Ubuntu package) - update to 6.8.0-1025.29
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1026.27~22.04.1
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1028.28, 6.8.0-1029.34, 6.8.0-1029.34~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1028.31, 6.8.0-1028.31.1, 6.8.0-1028.31~22.04.1
linux-realtime (Ubuntu package) - update to 6.8.1-1022.23
linux-image-generic-64k-hwe-24.04 (Ubuntu package) - addressed in versions 6.11.0-21.21, 6.11.0-21.21~24.04.1
linux-image-generic-64k (Ubuntu package) - update to 6.11.0-21.21
linux-image-generic-hwe-24.04 (Ubuntu package) - addressed in versions 6.11.0-21.21, 6.11.0-21.21~24.04.1
linux-image-oem-24.04 (Ubuntu package) - update to 6.11.0-21.21
linux-image-oem-24.04a (Ubuntu package) - update to 6.11.0-21.21
linux-image-virtual (Ubuntu package) - update to 6.11.0-21.21
linux-image-virtual-hwe-24.04 (Ubuntu package) - addressed in versions 6.11.0-21.21, 6.11.0-21.21~24.04.1
linux-image-generic (Ubuntu package) - update to 6.11.0-21.21
linux-image-6.11.0-21-generic (Ubuntu package) - addressed in versions 6.11.0-21.21, 6.11.0-21.21~24.04.1+1
linux-image-6.11.0-21-generic-64k (Ubuntu package) - addressed in versions 6.11.0-21.21, 6.11.0-21.21~24.04.1+1
linux-image-6.11.0-1007-realtime (Ubuntu package) - update to 6.11.0-1007.7
linux-image-realtime-hwe-24.04 (Ubuntu package) - update to 6.11.0-1007.7
linux-image-realtime (Ubuntu package) - update to 6.11.0-1007.7
linux-image-6.11.0-1010-raspi (Ubuntu package) - update to 6.11.0-1010.10
linux-image-raspi (Ubuntu package) - update to 6.11.0-1010.10
linux-image-gcp (Ubuntu package) - update to 6.11.0-1011.11
linux-image-gcp-64k (Ubuntu package) - update to 6.11.0-1011.11
linux-image-6.11.0-1011-gcp-64k (Ubuntu package) - update to 6.11.0-1011.11
linux-image-6.11.0-1011-gcp (Ubuntu package) - update to 6.11.0-1011.11
linux-image-lowlatency (Ubuntu package) - update to 6.11.0-1011.12
linux-image-6.11.0-1011-aws (Ubuntu package) - update to 6.11.0-1011.12
linux-image-lowlatency-64k (Ubuntu package) - update to 6.11.0-1011.12
linux-image-aws (Ubuntu package) - update to 6.11.0-1011.12
linux-image-6.11.0-1011-lowlatency-64k (Ubuntu package) - update to 6.11.0-1011.12~24.04.1
linux-image-6.11.0-1011-lowlatency (Ubuntu package) - update to 6.11.0-1011.12~24.04.1
linux-image-lowlatency-hwe-24.04 (Ubuntu package) - update to 6.11.0-1011.12~24.04.1
linux-image-lowlatency-64k-hwe-24.04 (Ubuntu package) - update to 6.11.0-1011.12~24.04.1
linux-image-6.11.0-1012-azure (Ubuntu package) - update to 6.11.0-1012.12
linux-image-azure-fde (Ubuntu package) - update to 6.11.0-1012.12
linux-image-azure (Ubuntu package) - update to 6.11.0-1012.12
linux-image-6.11.0-1012-azure-fde (Ubuntu package) - update to 6.11.0-1012.12
linux-image-oracle-64k (Ubuntu package) - update to 6.11.0-1013.14
linux-image-6.11.0-1013-oracle (Ubuntu package) - update to 6.11.0-1013.14
linux-image-6.11.0-1013-oracle-64k (Ubuntu package) - update to 6.11.0-1013.14
linux-image-oracle (Ubuntu package) - update to 6.11.0-1013.14
linux-image-oem-24.04b (Ubuntu package) - update to 6.11.0-1017.17
linux-image-6.11.0-1017-oem (Ubuntu package) - update to 6.11.0-1017.17

External References

Related Security Bulletins