Out-of-bounds read in Linux kernel - CVE-2026-68160

Vulnerability identifier: #VU142147

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-68160

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in ceph_handle_caps() and ceph_update_snap_trace() when processing a crafted Ceph MDS caps message with a malicious snap_trace_len value. A remote attacker can send a specially crafted message to disclose sensitive information.

Exploitation requires a malicious or compromised MDS to send a version 1 message so the IMPORT path is reached without prior version-gated validation of snap_trace_len.

Linux kernel
openEuler
kernel
python3-perf-debuginfo
python3-perf
python2-perf-debuginfo
python2-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel-headers

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
python3-perf-debuginfo - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
python3-perf - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
python2-perf-debuginfo - update to 4.19.90-2608.5.0.0387
python2-perf - update to 4.19.90-2608.5.0.0387
perf-debuginfo - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
perf - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
kernel-tools-devel - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
kernel-tools-debuginfo - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
kernel-tools - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
kernel-source - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
kernel-devel - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
kernel-debugsource - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
kernel-debuginfo - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
bpftool-debuginfo - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
bpftool - addressed in versions 4.19.90-2608.5.0.0387, 5.10.0-330.0.0.231
kernel-headers - update to 5.10.0-330.0.0.231

• https://git.kernel.org/stable/c/03b417afce19ee6b6e61f1bbbbebac924c9f36d1
• https://git.kernel.org/stable/c/4dbc71bcaf9a30abf3920a4e2cc4ed33bba78c02
• https://git.kernel.org/stable/c/71893c342a26bcff92eaab0b2b75d64aed19308a
• https://git.kernel.org/stable/c/9081c71796724ffe96cba253f68fbe42363c5295
• https://git.kernel.org/stable/c/a4228b93706fb74a484e6ffb271c1cc2af3a2ddb

• Out-of-bounds read in Linux kernel ceph
• openEuler 22.03 LTS SP4 update for kernel
• openEuler 20.03 LTS SP4 update for kernel