CVE-2025-37915

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-37915
In the Linux kernel, the following vulnerability has been resolved: net_sched: drr: Fix double list add in class with netem as child qdisc As described in Gerrard's report [1], there are use cases where a netem child qdisc will make the parent qdisc's enqueue callback reentrant. In the case of drr, there won't be a UAF, but the code will add the same classifier to the list twice, which will cause memory corruption. In addition to checking for qlen being zero, this patch checks whether the class was already added to the active_list (cl_is_active) before adding to the list to cover for the reentrant case. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/

7.0 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.0 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/26e75716b94d6ff9be5ea07d63675c4d189f30b4 Patch
https://git.kernel.org/stable/c/2968632880f1792007eedd12eeedf7f6e2b7e9f3 Patch
https://git.kernel.org/stable/c/4b07ac06b0a712923255aaf2691637693fc7100d Patch
https://git.kernel.org/stable/c/4f0ecf50cdf76da95828578a92f130b653ac2fcf Patch
https://git.kernel.org/stable/c/5da3aad1a13e7edb8ff0778a444ccf49930313e9 Patch
https://git.kernel.org/stable/c/ab2248110738d4429668140ad22f530a9ee730e1 Patch
https://git.kernel.org/stable/c/db205b92dfe0501e5b92fb7cf00971d0e44ba3eb Patch
https://git.kernel.org/stable/c/f99a3fbf023e20b626be4b0f042463d598050c9a Patch
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html Mailing List
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Mailing List
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:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc8:*:*:*:*:*:*
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:*:*:*:*:*:*
History

17 Nov 2025, 17:00

Type Values Removed Values Added
First Time Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.0
CWE CWE-415
CPE cpe:2.3:o:linux:linux_kernel:5.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.0:rc8:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/26e75716b94d6ff9be5ea07d63675c4d189f30b4 - () https://git.kernel.org/stable/c/26e75716b94d6ff9be5ea07d63675c4d189f30b4 - Patch
References () https://git.kernel.org/stable/c/2968632880f1792007eedd12eeedf7f6e2b7e9f3 - () https://git.kernel.org/stable/c/2968632880f1792007eedd12eeedf7f6e2b7e9f3 - Patch
References () https://git.kernel.org/stable/c/4b07ac06b0a712923255aaf2691637693fc7100d - () https://git.kernel.org/stable/c/4b07ac06b0a712923255aaf2691637693fc7100d - Patch
References () https://git.kernel.org/stable/c/4f0ecf50cdf76da95828578a92f130b653ac2fcf - () https://git.kernel.org/stable/c/4f0ecf50cdf76da95828578a92f130b653ac2fcf - Patch
References () https://git.kernel.org/stable/c/5da3aad1a13e7edb8ff0778a444ccf49930313e9 - () https://git.kernel.org/stable/c/5da3aad1a13e7edb8ff0778a444ccf49930313e9 - Patch
References () https://git.kernel.org/stable/c/ab2248110738d4429668140ad22f530a9ee730e1 - () https://git.kernel.org/stable/c/ab2248110738d4429668140ad22f530a9ee730e1 - Patch
References () https://git.kernel.org/stable/c/db205b92dfe0501e5b92fb7cf00971d0e44ba3eb - () https://git.kernel.org/stable/c/db205b92dfe0501e5b92fb7cf00971d0e44ba3eb - Patch
References () https://git.kernel.org/stable/c/f99a3fbf023e20b626be4b0f042463d598050c9a - () https://git.kernel.org/stable/c/f99a3fbf023e20b626be4b0f042463d598050c9a - Patch
References () https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html - () https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html - Mailing List
References () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html - () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html - Mailing List

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
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net_sched: drr: Se corrige la doble adición de lista en la clase con netem como qdisc hija. Como se describe en el informe de Gerrard [1], existen casos de uso en los que una qdisc hija de netem hará que la devolución de llamada de encolado de la qdisc madre sea reentrante. En el caso de drr, no habrá un UAF, pero el código agregará el mismo clasificador a la lista dos veces, lo que causará corrupción de memoria. Además de verificar que qlen sea cero, este parche verifica si la clase ya se agregó a active_list (cl_is_active) antes de agregarla a la lista para cubrir el caso reentrante. [1] https://lore.kernel.org/netdev/CAHcdcOm+03OD2j6R0=YHKqmy=VgJ8xEOKuP6c7mSgnp-TEJJbw@mail.gmail.com/
References
  • () https://git.kernel.org/stable/c/4b07ac06b0a712923255aaf2691637693fc7100d -
  • () https://git.kernel.org/stable/c/5da3aad1a13e7edb8ff0778a444ccf49930313e9 -

20 May 2025, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-05-20 16:15

Updated : 2025-11-17 17:00

NVD link : CVE-2025-37915

Mitre link : CVE-2025-37915

CVE.ORG link : CVE-2025-37915

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-415

Double Free