Skip to main content

Debian Linux CVE-2025-39813

MEDIUM
Race Condition (CWE-362)
2025-09-16 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Information Disclosure Linux Race Condition Debian Debian Linux
4.7
CVSS 3.1 · NVD
Share

Severity by source

NVD PRIMARY
4.7 MEDIUM
AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
SUSE
MEDIUM
qualitative
Red Hat
5.5 LOW
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 28, 2026 - 19:12 vuln.today
Patch released
Mar 28, 2026 - 19:12 nvd
Patch available
CVE Published
Sep 16, 2025 - 13:15 nvd
MEDIUM 4.7

DescriptionCVE.org

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) <- len = size = 0 cat /sys/kernel/tracing/trace_pipe trace_find_next_entry_inc(&iter) __find_next_entry ring_buffer_empty_cpu <- all empty return NULL

trace_printk_seq(&iter.seq) WARN_ON_ONCE(s->seq.len >= s->seq.size)

In the context between trace_empty() and trace_find_next_entry_inc() during ftrace_dump, the ring buffer data was consumed by other readers. This caused trace_find_next_entry_inc to return NULL, failing to populate iter.seq. At this point, due to the prior trace_iterator_reset, both iter.seq.len and iter.seq.size were set to 0. Since they are equal, the WARN_ON_ONCE condition is triggered.

Move the trace_printk_seq() into the if block that checks to make sure the return value of trace_find_next_entry_inc() is non-NULL in ftrace_dump_one(), ensuring the 'iter.seq' is properly populated before subsequent operations.

AnalysisAI

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. Rated medium severity (CVSS 4.7).

Technical ContextAI

This vulnerability is classified under CWE-362. 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) <- len = size = 0 cat /sys/kernel/tracing/trace_pipe trace_find_next_entry_inc(&iter) __find_next_entry ring_buffer_empty_cpu <- all empty return NULL trace_printk_seq(&iter.seq) WARN_ON_ONCE(s->seq.len >= s->seq.size) In the context between trace_empty() and trace_find_next_entry_inc() during ftrace_dump, the ring buffer data was consumed by other readers. This caused trace_find_next_entry_inc to return NULL, failing to populate iter.seq. At this point, due to the prior trace_iterator_reset, both iter.seq.len and iter.seq.size were set to 0. Since they are equal, the WARN_ON_ONCE condition is triggered. Move the trace_printk_seq() into the if block that checks to make sure the return value of trace_find_next_entry_inc() is non-NULL in ftrace_dump_one(), ensuring the 'iter.seq' is properly populated before subsequent operations. Affected products include: Linux Linux Kernel, Debian Debian Linux.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

More in Debian Linux

View all
CVE-2021-44228 CRITICAL POC
10.0 Dec 10

Apache Log4j2 contains a critical JNDI injection vulnerability known as 'Log4Shell' that allows unauthenticated remote c
CVE-2019-11043 CRITICAL POC
9.8 Oct 28

In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it

CVE-2012-1823 CRITICAL POC
9.8 May 11

sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not
CVE-2014-6271 CRITICAL POC
9.8 Sep 24

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which
CVE-2017-7494 CRITICAL POC
9.8 May 30

Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allo
CVE-2012-0507 CRITICAL POC
9.8 Jun 07

Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 2 and earlier, 6 Up
CVE-2025-49113 CRITICAL POC
9.9 Jun 02

Roundcube Webmail contains a critical PHP object deserialization vulnerability (CVE-2025-49113, CVSS 9.9) that allows au
CVE-2022-30333 HIGH POC
7.5 May 09

RARLAB UnRAR before 6.12 on Linux and UNIX allows directory traversal to write to files during an extract (aka unpack) o
CVE-2016-3714 HIGH POC
8.4 May 05

The (1) EPHEMERAL, (2) HTTPS, (3) MVG, (4) MSL, (5) TEXT, (6) SHOW, (7) WIN, and (8) PLT coders in ImageMagick before 6.
CVE-2017-12617 HIGH POC
8.1 Oct 04

When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTT
CVE-2020-1938 CRITICAL POC
9.8 Feb 24

When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to Apache Tomcat. Rate
CVE-2018-7602 CRITICAL POC
9.8 Jul 19

A remote code execution vulnerability exists within multiple subsystems of Drupal 7.x and 8.x. Rated critical severity (

Same weakness CWE-362 – Race Condition

View all
CVE-2023-36884 HIGH POC
7.5
CVE-2016-5195 HIGH POC
7.0
CVE-2017-1000112 HIGH POC
7.0
CVE-2014-0196 MEDIUM POC
5.5
CVE-2014-0226 MEDIUM POC
6.8
CVE-2016-1757 HIGH POC
7.0
CVE-2016-8655 HIGH POC
7.8
CVE-2015-5754 CRITICAL POC
9.3

Same technique Information Disclosure

View all
CVE-2019-2725 CRITICAL POC
9.8
CVE-2021-34523 CRITICAL POC
9.0
CVE-2013-2251 CRITICAL POC
9.8
CVE-2017-5638 CRITICAL POC
9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5
CVE-2014-6324 HIGH POC
8.8

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
Container suse/sl-micro/6.0/baremetal-os-container:2.1.3-6.35 Container suse/sl-micro/6.0/toolbox:13.2-9.1 Affected
Container suse/sl-micro/6.0/base-os-container:2.1.3-7.95 Image SL-Micro Image SLE-Micro Image SLE-Micro-EC2 Affected
Container suse/sl-micro/6.0/kvm-os-container:2.1.3-6.115 Affected
Container suse/sl-micro/6.0/rt-os-container:2.1.3-7.146 Affected
Container suse/sl-micro/6.1/base-os-container:2.2.1-5.80 Image SL-Micro-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-Azure-ltd Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-EC2-llc Image SUSE-Multi-Linux-Manager-Server-EC2-ltd Affected

Share

CVE-2025-39813 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy