CVE-2025-38349

highPriorität · verfolgen · 31EPSS 0.002 · 8. PerzentilDEEUNLRUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.18% (8th) EPSS

CVSS 7.8 · high

Is it mine?

37 products

Prüfe deine Angriffsfläche

Who says so?

7 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · bewertet 2026-10-22

In the Linux kernel, the following vulnerability has been resolved: eventpoll: don't decrement ep refcount while still holding the ep mutex Jann Horn points out that epoll is decrementing the ep refcount and then doing a mutex_unlock(&ep->mtx); afterwards. That's very wrong, because it can lead to a use-after-free. That pattern is actually fine for the very last reference, because the code in question will delay the actual call to "ep_free(ep)" until after it has unlocked the mutex. But it's wrong for the much subtler "next to last" case when somebody *else* may also be dropping their reference and free the ep while we're still using the mutex. Note that this is true even if that other user is also using the same ep mutex: mutexes, unlike spinlocks, can not be used for object ownership, even if they guarantee mutual exclusion. A mutex "unlock" operation is not atomic, and as one user is still accessing the mutex as part of unlocking it, another user can come in and get the now released mutex and free the data structure while the first user is still cleaning up. See our mutex documentation in Documentation/locking/mutex-design.rst, in particular the section [1] about semantics: "mutex_unlock() may access the mutex structure even after it has internally released the lock already - so it's not safe for another context to acquire the mutex and assume that the mutex_unlock() context is not using the structure anymore" So if we drop our ep ref before the mutex unlock, but we weren't the last one, we may then unlock the mutex, another user comes in, drops _their_ reference and releases the 'ep' as it now has no users - all while the mutex_unlock() is still accessing it. Fix this by simply moving the ep refcount dropping to outside the mutex: the refcount itself is atomic, and doesn't need mutex protection (that's the whole _point_ of refcounts: unlike mutexes, they are inherently about object lifetimes).

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To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenkernel-headers-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenkernel-modules-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenkernel-modules-core-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenkernel-modules-extra-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenkernel-tools-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenkernel-tools-libs-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenkernel-tools-libs-devel-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenkernel-uki-virt-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenkernel-uki-virt-addons-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenlibperf-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenperf-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenpython3-perf-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenrtla-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Behobenrv-0:5.14.0-570.89.1.el9_6.x86_64 as component of SUSE Liberty Linux 9.6 EMSsuse_csaf
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

8.4

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 6.5–8.4

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USAusnutzbarkeit 1.8 · Auswirkung 5.9

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

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HsecondaryAusnutzbarkeit 1.8 · Auswirkung 5.9

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

v3.16.5mediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:Hsecondary · SUSE Product Security

v3.18.4highCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · NCSC-NL NL

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-416USprimärCWE-416USCWE-416US

betroffene Produkte (37)

Betroffene Produkte und Versionsbereiche.

Ubuntu Linuxalle Versionencert_bundDEcpe:/o:canonical:ubuntu_linux:-
IBM Security Verify Access< 10.0.9.2cert_bundDE
Linux Linux≤ f2451def095c…enisa_euvdEU
Linux Linuxalle Versionenenisa_euvdEU
Linux Linux≤ 6.4enisa_euvdEU
Linux Linux< 6.1.178enisa_euvdEU
Linux Linux< 6.12.39enisa_euvdEU
Linux Linux< 6.15.7enisa_euvdEU
Linux Linux< 6.16enisa_euvdEU
Linux Linux< 6.6.99enisa_euvdEU
Linux Linux5.15.209 → 5.16enisa_euvdEU
Linux Linux58c9b016e128… → 521e9ff0b67c…enisa_euvdEU
Linux Linux58c9b016e128… → 605c18698ecf…enisa_euvdEU
Linux Linux58c9b016e128… → 6dee745bd0ae…enisa_euvdEU
Linux Linux58c9b016e128… → 8c2e52ebbe88…enisa_euvdEU
Linux Linux6.1.175 → 6.1.178enisa_euvdEU
Linux Linuxa1f93804449d… → b0821ec902d3…enisa_euvdEU
Red Hat, Inc. Red Hat Enterprise Linux≤ 9fstec_bduRU
Red Hat, Inc. Red Hat Enterprise Linux≤ 7fstec_bduRU
Red Hat, Inc. Red Hat Enterprise Linux≤ 10fstec_bduRU

20 von 37 angezeigt

Advisories (8)

Hersteller- und Ökosystem-Meldungen dazu.

NCSC-2025-0379Kwetsbaarheden verholpen in Google Android en Samsung MobileNL2025-12-02csaf · ncsc_nlNL
Google heeft kwetsbaarheden verholpen in Android. Samsung heeft de voor Samsung mobile relevante kwetsbaarheden verholpen in Samsung mobile.
RHSA-2026:1143security update for kernel2026-01-26csaf · suse_csafDE
security update for kernel
RHSA-2026:1690security update for kernel2026-02-02csaf · suse_csafDE
security update for kernel
RHSA-2026:2759security update for kernel2026-02-16csaf · suse_csafDE
security update for kernel
WID-SEC-W-2025-1596Linux Kernel: Schwachstelle ermöglicht Denial of Service und nicht spezifizierten AngriffDeutsch2025-07-17csaf · cert_bundDE
Ein lokaler Angreifer kann eine Schwachstelle im Linux Kernel ausnutzen, um einen Denial of Service, und nicht näher spezifizierte Auswirkungen zu verursachen.
WID-SEC-W-2025-2711Android Patchday Dezember 2025: Mehrere SchwachstellenDeutsch2025-12-01csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Google Android ausnutzen, um sich erweiterte Berechtigungen zu verschaffen, einen Denial-of-Service-Zustand auszulösen, vertrauliche Informationen offenzulegen oder andere nicht näher spezifizierte Angriffe durchzuführen.
WID-SEC-W-2026-2253IBM Security Verify Access: Mehrere SchwachstellenDeutsch2026-07-08csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM Security Verify Access ausnutzen, um erweiterte Berechtigungen zu erlangen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, sensible Informationen offenzulegen und andere, nicht näher bezeichnete Angriffe durchzuführen.
ASB-A-4327514212025-12-01vendor · osvUS
In multiple functions of eventpoll.c, there is a possible use after free due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

auch bekannt als (5)

Weitere Namen und Kennungen dieser Entität.

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvd enisa_euvd fstec_bdu osv cert_bund ncsc_nl suse_csaf NVD CVE.org MITRE

veröffentlicht 2025-07-18geändert 2026-10-08

verwandt (12,026)

Verwandte Einträge.

ID	Schweregrad	EPSS	ausnutzbar	veröffentlicht
CVE-2026-68820US	—OT kritisch	0.33% (25th)	KEV	2026-08-11
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVE-2026-5281US	—OT kritisch	0.70% (53rd)	KEV	2026-04-01
Use after free in Dawn in Google Chrome prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process to execute arbitrary code via a crafted HTML page…
CVE-2026-2441US	high8.8OT kritisch	55.0% (99th)	KEV	2026-02-13
Use after free in CSS in Google Chrome prior to 145.0.7632.75 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security sever…
CVE-2025-43529US	—OT kritisch	8.76% (95th)	KEV	2025-12-17
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2,…
CVE-2025-62221US	—OT kritisch	2.50% (85th)	KEV	2025-12-09
Use after free in Windows Cloud Files Mini Filter Driver allows an authorized attacker to elevate privileges locally.

+12021 weitere

Referenzen (21)

Externe Belege — Patches, Meldungen, Analysen.

scry

Angreifer nutzen Schwachstellen wie diese gegen im Internet exponierte Dienste aus. Sehen Sie mit einem kostenlosen Passiv-Scan, was exponiert ist.

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