CVE-2025-39813 — Race Condition in Linux
Severity
4.7MEDIUMNVD
EPSS
0.0%
top 98.11%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedSep 16
Latest updateApr 9
Description
In the Linux kernel, the following vulnerability has been resolved:
ftrace: Fix potential warning in trace_printk_seq during ftrace_dump
When calling ftrace_dump_one() concurrently with reading trace_pipe,
a WARN_ON_ONCE() in trace_printk_seq() can be triggered due to a race
condition.
The issue occurs because:
CPU0 (ftrace_dump) CPU1 (reader)
echo z > /proc/sysrq-trigger
!trace_empty(&iter)
trace_iterator_reset(&iter) seq.len >= s->seq.size)
In the context between trace_empty() and trace_…
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.0 | Impact: 3.6
Affected Packages3 packages
▶CVEListV5linux/linuxd769041f865330034131525ee6a7f72eb4af2a24 — f299353e7ccbcc5c2ed8993c48fbe7609cbe729a+8
Also affects: Debian Linux 11.0
Patches
🔴Vulnerability Details
3GHSA▶
GHSA-cfrf-hx42-xr6f: In the Linux kernel, the following vulnerability has been resolved:
ftrace: Fix potential warning in trace_printk_seq during ftrace_dump
When callin↗2025-09-16
OSV▶
CVE-2025-39813: In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix potential warning in trace_printk_seq during ftrace_dump When calling↗2025-09-16