CVE-2025-39848

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-39848
In the Linux kernel, the following vulnerability has been resolved: ax25: properly unshare skbs in ax25_kiss_rcv() Bernard Pidoux reported a regression apparently caused by commit c353e8983e0d ("net: introduce per netns packet chains"). skb->dev becomes NULL and we crash in __netif_receive_skb_core(). Before above commit, different kind of bugs or corruptions could happen without a major crash. But the root cause is that ax25_kiss_rcv() can queue/mangle input skb without checking if this skb is shared or not. Many thanks to Bernard Pidoux for his help, diagnosis and tests. We had a similar issue years ago fixed with commit 7aaed57c5c28 ("phonet: properly unshare skbs in phonet_rcv()").

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/01a2984cb803f2d487b7074f9718db2bf3531f69 Patch
https://git.kernel.org/stable/c/2bd0f67212908243ce88e35bf69fa77155b47b14 Patch
https://git.kernel.org/stable/c/42b46684e2c78ee052d8c2ee8d9c2089233c9094 Patch
https://git.kernel.org/stable/c/5b079be1b9da49ad88fc304c874d4be7085f7883 Patch
https://git.kernel.org/stable/c/7d449b7a6c8ee434d10a483feed7c5c50108cf56 Patch
https://git.kernel.org/stable/c/8156210d36a43e76372312c87eb5ea3dbb405a85 Patch
https://git.kernel.org/stable/c/89064cf534bea4bb28c83fe6bbb26657b19dd5fe Patch
https://git.kernel.org/stable/c/b1c71d674a308d2fbc83efcf88bfc4217a86aa17 Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Third Party Advisory Mailing List
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html Third Party Advisory 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:2.6.12:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*

Configuration 2 (hide)

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

20 Jan 2026, 15:19

Type Values Removed Values Added
First Time Linux
Debian
Debian debian Linux
Linux linux Kernel
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-401
References () https://git.kernel.org/stable/c/01a2984cb803f2d487b7074f9718db2bf3531f69 - () https://git.kernel.org/stable/c/01a2984cb803f2d487b7074f9718db2bf3531f69 - Patch
References () https://git.kernel.org/stable/c/2bd0f67212908243ce88e35bf69fa77155b47b14 - () https://git.kernel.org/stable/c/2bd0f67212908243ce88e35bf69fa77155b47b14 - Patch
References () https://git.kernel.org/stable/c/42b46684e2c78ee052d8c2ee8d9c2089233c9094 - () https://git.kernel.org/stable/c/42b46684e2c78ee052d8c2ee8d9c2089233c9094 - Patch
References () https://git.kernel.org/stable/c/5b079be1b9da49ad88fc304c874d4be7085f7883 - () https://git.kernel.org/stable/c/5b079be1b9da49ad88fc304c874d4be7085f7883 - Patch
References () https://git.kernel.org/stable/c/7d449b7a6c8ee434d10a483feed7c5c50108cf56 - () https://git.kernel.org/stable/c/7d449b7a6c8ee434d10a483feed7c5c50108cf56 - Patch
References () https://git.kernel.org/stable/c/8156210d36a43e76372312c87eb5ea3dbb405a85 - () https://git.kernel.org/stable/c/8156210d36a43e76372312c87eb5ea3dbb405a85 - Patch
References () https://git.kernel.org/stable/c/89064cf534bea4bb28c83fe6bbb26657b19dd5fe - () https://git.kernel.org/stable/c/89064cf534bea4bb28c83fe6bbb26657b19dd5fe - Patch
References () https://git.kernel.org/stable/c/b1c71d674a308d2fbc83efcf88bfc4217a86aa17 - () https://git.kernel.org/stable/c/b1c71d674a308d2fbc83efcf88bfc4217a86aa17 - Patch
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, Mailing List
References () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - Third Party Advisory, Mailing List
CPE cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*

03 Nov 2025, 18:16

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html -
  • () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html -

19 Sep 2025, 16:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-09-19 16:15

Updated : 2026-01-20 15:19

NVD link : CVE-2025-39848

Mitre link : CVE-2025-39848

CVE.ORG link : CVE-2025-39848

JSON object : View

Products Affected

debian

  • debian_linux

linux

  • linux_kernel
CWE
CWE-401

Missing Release of Memory after Effective Lifetime