CVE-2025-21640

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21640
In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: cookie_hmac_alg: avoid using current->nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the reader's/writer's netns vs only from the opener's netns. - current->nsproxy can be NULL in some cases, resulting in an 'Oops' (null-ptr-deref), e.g. when the current task is exiting, as spotted by syzbot [1] using acct(2). The 'net' structure can be obtained from the table->data using container_of(). Note that table->data could also be used directly, as this is the only member needed from the 'net' structure, but that would increase the size of this fix, to use '*data' everywhere 'net->sctp.sctp_hmac_alg' is used.

5.5 /10

CVSS v3.0 : 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/03ca51faba2b017bf6c90e139434c4117d0afcdc Patch
https://git.kernel.org/stable/c/3cd0659deb9c03535fd61839e91d4d4d3e51ac71 Patch
https://git.kernel.org/stable/c/5599b212d2f4466e1832a94e9932684aaa364587
https://git.kernel.org/stable/c/86ddf8118123cb58a0fb8724cad6979c4069065b Patch
https://git.kernel.org/stable/c/ad673e514b2793b8d5902f6ba6ab7e890dea23d5 Patch
https://git.kernel.org/stable/c/ea62dd1383913b5999f3d16ae99d411f41b528d4 Patch
https://git.kernel.org/stable/c/f0bb3935470684306e4e04793a20ac4c4b08de0b Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

10 Apr 2025, 13:15

Type Values Removed Values Added
CWE CWE-476
References
  • {'url': 'https://git.kernel.org/stable/c/1031462a944ba0fa83c25ab1111465f8345b5589', 'name': 'https://git.kernel.org/stable/c/1031462a944ba0fa83c25ab1111465f8345b5589', 'tags': ['Patch'], 'refsource': ''}
  • () https://git.kernel.org/stable/c/5599b212d2f4466e1832a94e9932684aaa364587 -

27 Feb 2025, 21:59

Type Values Removed Values Added
References () https://git.kernel.org/stable/c/1031462a944ba0fa83c25ab1111465f8345b5589 - () https://git.kernel.org/stable/c/1031462a944ba0fa83c25ab1111465f8345b5589 - Patch
References () https://git.kernel.org/stable/c/ea62dd1383913b5999f3d16ae99d411f41b528d4 - () https://git.kernel.org/stable/c/ea62dd1383913b5999f3d16ae99d411f41b528d4 - Patch
References () https://git.kernel.org/stable/c/ad673e514b2793b8d5902f6ba6ab7e890dea23d5 - () https://git.kernel.org/stable/c/ad673e514b2793b8d5902f6ba6ab7e890dea23d5 - Patch
References () https://git.kernel.org/stable/c/03ca51faba2b017bf6c90e139434c4117d0afcdc - () https://git.kernel.org/stable/c/03ca51faba2b017bf6c90e139434c4117d0afcdc - Patch
References () https://git.kernel.org/stable/c/86ddf8118123cb58a0fb8724cad6979c4069065b - () https://git.kernel.org/stable/c/86ddf8118123cb58a0fb8724cad6979c4069065b - Patch
References () https://git.kernel.org/stable/c/3cd0659deb9c03535fd61839e91d4d4d3e51ac71 - () https://git.kernel.org/stable/c/3cd0659deb9c03535fd61839e91d4d4d3e51ac71 - Patch
References () https://git.kernel.org/stable/c/f0bb3935470684306e4e04793a20ac4c4b08de0b - () https://git.kernel.org/stable/c/f0bb3935470684306e4e04793a20ac4c4b08de0b - Patch
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CPE cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*

02 Feb 2025, 11:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/1031462a944ba0fa83c25ab1111465f8345b5589 -
  • () https://git.kernel.org/stable/c/03ca51faba2b017bf6c90e139434c4117d0afcdc -

23 Jan 2025, 17:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/86ddf8118123cb58a0fb8724cad6979c4069065b -

19 Jan 2025, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-01-19 11:15

Updated : 2025-04-10 13:15

NVD link : CVE-2025-21640

Mitre link : CVE-2025-21640

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference