CVE-2025-37992

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-37992
In the Linux kernel, the following vulnerability has been resolved: net_sched: Flush gso_skb list too during ->change() Previously, when reducing a qdisc's limit via the ->change() operation, only the main skb queue was trimmed, potentially leaving packets in the gso_skb list. This could result in NULL pointer dereference when we only check sch->limit against sch->q.qlen. This patch introduces a new helper, qdisc_dequeue_internal(), which ensures both the gso_skb list and the main queue are properly flushed when trimming excess packets. All relevant qdiscs (codel, fq, fq_codel, fq_pie, hhf, pie) are updated to use this helper in their ->change() routines.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8 Patch
https://git.kernel.org/stable/c/a7d6e0ac0a8861f6b1027488062251a8e28150fd Patch
https://git.kernel.org/stable/c/d1365ca80b012d8a7863e45949e413fb61fa4861 Patch
https://git.kernel.org/stable/c/d3336f746f196c6a53e0480923ae93939f047b6c Patch
https://git.kernel.org/stable/c/d38939ebe0d992d581acb6885c1723fa83c1fb2c Patch
https://git.kernel.org/stable/c/ea1132ccb112f51ba749c56a912f67970c2cd542 Patch
https://git.kernel.org/stable/c/fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76 Patch
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Third Party Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
History

16 Dec 2025, 20:19

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:6.15:rc5:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
First Time Linux
Debian
Debian debian Linux
Linux linux Kernel
CWE CWE-476
References () https://git.kernel.org/stable/c/2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8 - () https://git.kernel.org/stable/c/2d3cbfd6d54a2c39ce3244f33f85c595844bd7b8 - Patch
References () https://git.kernel.org/stable/c/a7d6e0ac0a8861f6b1027488062251a8e28150fd - () https://git.kernel.org/stable/c/a7d6e0ac0a8861f6b1027488062251a8e28150fd - Patch
References () https://git.kernel.org/stable/c/d1365ca80b012d8a7863e45949e413fb61fa4861 - () https://git.kernel.org/stable/c/d1365ca80b012d8a7863e45949e413fb61fa4861 - Patch
References () https://git.kernel.org/stable/c/d3336f746f196c6a53e0480923ae93939f047b6c - () https://git.kernel.org/stable/c/d3336f746f196c6a53e0480923ae93939f047b6c - Patch
References () https://git.kernel.org/stable/c/d38939ebe0d992d581acb6885c1723fa83c1fb2c - () https://git.kernel.org/stable/c/d38939ebe0d992d581acb6885c1723fa83c1fb2c - Patch
References () https://git.kernel.org/stable/c/ea1132ccb112f51ba749c56a912f67970c2cd542 - () https://git.kernel.org/stable/c/ea1132ccb112f51ba749c56a912f67970c2cd542 - Patch
References () https://git.kernel.org/stable/c/fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76 - () https://git.kernel.org/stable/c/fe88c7e4fc2c1cd75a278a15ffbf1689efad4e76 - Patch
References () https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html - () https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html - Third Party Advisory
References () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html - () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html - Third Party Advisory

03 Nov 2025, 20:18

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html -

03 Nov 2025, 18:15

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html -

04 Jun 2025, 13:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/ea1132ccb112f51ba749c56a912f67970c2cd542 -

28 May 2025, 15:01

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net_sched: Vaciar también la lista gso_skb durante ->change(). Anteriormente, al reducir el límite de una qdisc mediante la operación ->change(), solo se recortaba la cola principal de skb, lo que podía dejar paquetes en la lista gso_skb. Esto podía provocar una desreferencia de puntero nulo al comparar únicamente sch->limit con sch->q.qlen. Este parche introduce un nuevo asistente, qdisc_dequeue_internal(), que garantiza que tanto la lista gso_skb como la cola principal se vacíen correctamente al recortar los paquetes sobrantes. Todas las qdisc relevantes (codel, fq, fq_codel, fq_pie, hhf, pie) se han actualizado para usar este asistente en sus rutinas ->change().

26 May 2025, 15:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-26 15:15

Updated : 2025-12-16 20:19

NVD link : CVE-2025-37992

Mitre link : CVE-2025-37992

CVE.ORG link : CVE-2025-37992

JSON object : View

Products Affected

debian

  • debian_linux

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference