CVE-2025-39994

highpriority · track · 0EPSS 0.002 · 4 %ileDEEURU

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.15% (4th) EPSS

CVSS 7 · high

Is it mine?

60 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-22

In the Linux kernel, the following vulnerability has been resolved: media: tuner: xc5000: Fix use-after-free in xc5000_release The original code uses cancel_delayed_work() in xc5000_release(), which does not guarantee that the delayed work item timer_sleep has fully completed if it was already running. This leads to use-after-free scenarios where xc5000_release() may free the xc5000_priv while timer_sleep is still active and attempts to dereference the xc5000_priv. A typical race condition is illustrated below: CPU 0 (release thread) | CPU 1 (delayed work callback) xc5000_release() | xc5000_do_timer_sleep() cancel_delayed_work() | hybrid_tuner_release_state(priv) | kfree(priv) | | priv = container_of() // UAF Replace cancel_delayed_work() with cancel_delayed_work_sync() to ensure that the timer_sleep is properly canceled before the xc5000_priv memory is deallocated. A deadlock concern was considered: xc5000_release() is called in a process context and is not holding any locks that the timer_sleep work item might also need. Therefore, the use of the _sync() variant is safe here. This bug was initially identified through static analysis. [hverkuil: fix typo in Subject: tunner -> tuner]

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixedkernel-obs-build-0:6.12.0-160000.7.1.aarch64 as component of SUSE Linux Micro Extras 6.2suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-obs-build-0:6.12.0-160000.7.1.ppc64le as component of SUSE Linux Micro Extras 6.2suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-obs-build-0:6.12.0-160000.7.1.s390x as component of SUSE Linux Micro Extras 6.2suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-obs-build-0:6.12.0-160000.7.1.x86_64 as component of SUSE Linux Micro Extras 6.2suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-syms-0:6.12.0-160000.7.1.aarch64 as component of SUSE Linux Micro Extras 6.2suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-syms-0:6.12.0-160000.7.1.ppc64le as component of SUSE Linux Micro Extras 6.2suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-syms-0:6.12.0-160000.7.1.s390x as component of SUSE Linux Micro Extras 6.2suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-syms-0:6.12.0-160000.7.1.x86_64 as component of SUSE Linux Micro Extras 6.2suse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-devel-longterm-0:6.18.16-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-devel-longterm-0:6.18.16-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-devel-longterm-0:6.18.16-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-devel-longterm-0:6.18.16-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-source-longterm-0:6.18.16-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-source-longterm-0:6.18.16-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-source-longterm-0:6.18.16-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Fixedkernel-source-longterm-0:6.18.16-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

cvss

Technical severity, 0–10. One row per scoring source.

7.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.5–7.3

v3.17highAV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.3highCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.3highCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:Hsecondaryexploitability 1.3 · impact 5.9

v3.16.7mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hsecondary · SUSE Product Security

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416US

affected products (60)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Dell ECS 3.8.1.0-3.8.1.7all versionscert_bundDEcpe:/h:dell:ecs:3.8.1.0_-_3.8.1.7
Google Container-Optimized OSall versionscert_bundDEcpe:/o:google:container-optimized_os:-
IBM DataPower Gatewayall versionscert_bundDEcpe:/a:ibm:datapower_gateway:-
IBM DataPower Gateway 10.5.0.0-10.5.0.20all versionscert_bundDEcpe:/a:ibm:datapower_gateway:10.5.0.0_-_10.5.0.20
IBM DataPower Gateway 10.6.0.0-10.6.0.8all versionscert_bundDEcpe:/a:ibm:datapower_gateway:10.6.0.0_-_10.6.0.8
IBM FlashSystemall versionscert_bundDEcpe:/a:ibm:flashsystem:-
IBM QRadar SIEMall versionscert_bundDEcpe:/a:ibm:qradar_siem:-
IBM SAN Volume Controllerall versionscert_bundDEcpe:/a:ibm:san_volume_controller:-
IBM Storwizeall versionscert_bundDEcpe:/a:ibm:storwize:-
Open Source Linux Kernelall versionscert_bundDEcpe:/o:linux:linux_kernel:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
Red Hat Enterprise Linux 10all versionscert_bundDEcpe:/o:redhat:enterprise_linux:10
Red Hat Enterprise Linux 8all versionscert_bundDEcpe:/o:redhat:enterprise_linux:8
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Siemens SIMATIC S7 1500 CPUall versionscert_bundDEcpe:/h:siemens:simatic_s7:1500_cpu

showing 20 of 60

advisories (3)

Vendor and ecosystem advisories describing this.

SUSE-SU-2026:20561-1Security update for the Linux Kernel2025-11-26csaf · suse_csafDE
Security update for the Linux Kernel
WID-SEC-W-2025-2298Linux Kernel: Mehrere SchwachstellenDeutsch2025-10-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen im Linux-Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen, Daten zu manipulieren und andere, nicht näher spezifizierte Angriffe durchzuführen.
openSUSE-SU-2026:10301-1kernel-devel-longterm-6.18.16-1.1 on GA media2026-03-07csaf · suse_csafDE
kernel-devel-longterm-6.18.16-1.1 on GA media

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund suse_csaf NVD CVE.org MITRE

published 2025-10-15modified 2026-10-19

references (25)

External citations — patches, advisories, analysis.

scry

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