CVE-2025-21639

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21639
In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: rto_min/max: 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.rto_min/max' is used.

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/0f78f09466744589e420935e646ae78212a38290 Patch
https://git.kernel.org/stable/c/246428bfb9e7db15c5cd08e1d0eca41b65af2b06 Patch
https://git.kernel.org/stable/c/4059507e34aa5fe0fa9fd5b2b5f0c8b26ab2d482 Patch
https://git.kernel.org/stable/c/9fc17b76fc70763780aa78b38fcf4742384044a5 Patch
https://git.kernel.org/stable/c/c87f1f6ade56c711f8736901e330685b453e420e Patch
https://git.kernel.org/stable/c/c8d179f3b1c1d60bf4484f50aa67b4c70f91bff9 Patch
https://git.kernel.org/stable/c/dc9d0e3cfd16f66fbf0862857c6b391c8613ca9f Patch
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:6.13:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*
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:*:*:*:*:*:*
History

27 Feb 2025, 21:59

Type Values Removed Values Added
CWE CWE-476
First Time Linux linux Kernel
Linux
CPE cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/0f78f09466744589e420935e646ae78212a38290 - () https://git.kernel.org/stable/c/0f78f09466744589e420935e646ae78212a38290 - Patch
References () https://git.kernel.org/stable/c/246428bfb9e7db15c5cd08e1d0eca41b65af2b06 - () https://git.kernel.org/stable/c/246428bfb9e7db15c5cd08e1d0eca41b65af2b06 - Patch
References () https://git.kernel.org/stable/c/4059507e34aa5fe0fa9fd5b2b5f0c8b26ab2d482 - () https://git.kernel.org/stable/c/4059507e34aa5fe0fa9fd5b2b5f0c8b26ab2d482 - Patch
References () https://git.kernel.org/stable/c/9fc17b76fc70763780aa78b38fcf4742384044a5 - () https://git.kernel.org/stable/c/9fc17b76fc70763780aa78b38fcf4742384044a5 - Patch
References () https://git.kernel.org/stable/c/c87f1f6ade56c711f8736901e330685b453e420e - () https://git.kernel.org/stable/c/c87f1f6ade56c711f8736901e330685b453e420e - Patch
References () https://git.kernel.org/stable/c/c8d179f3b1c1d60bf4484f50aa67b4c70f91bff9 - () https://git.kernel.org/stable/c/c8d179f3b1c1d60bf4484f50aa67b4c70f91bff9 - Patch
References () https://git.kernel.org/stable/c/dc9d0e3cfd16f66fbf0862857c6b391c8613ca9f - () https://git.kernel.org/stable/c/dc9d0e3cfd16f66fbf0862857c6b391c8613ca9f - Patch

02 Feb 2025, 11:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/246428bfb9e7db15c5cd08e1d0eca41b65af2b06 -
  • () https://git.kernel.org/stable/c/c8d179f3b1c1d60bf4484f50aa67b4c70f91bff9 -

23 Jan 2025, 17:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/0f78f09466744589e420935e646ae78212a38290 -
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sctp: sysctl: rto_min/max: evitar usar current->nsproxy Como se mencionó en un commit anterior de esta serie, no se recomienda usar la estructura 'net' a través de 'current' por diferentes razones: - Inconsistencia: obtener información de los netns del lector/escritor vs solo de los netns del abridor. - current->nsproxy puede ser NULL en algunos casos, lo que resulta en un 'Oops' (null-ptr-deref), por ejemplo cuando la tarea actual está saliendo, como lo detectó syzbot [1] usando acct(2). La estructura 'net' se puede obtener de table->data usando Container_of(). Tenga en cuenta que table->data también se puede usar directamente, ya que este es el único miembro necesario de la estructura 'net', pero eso aumentaría el tamaño de esta corrección, para usar '*data' en todos los lugares donde se usa 'net->sctp.rto_min/max'.

19 Jan 2025, 11:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-01-19 11:15

Updated : 2025-02-27 21:59

NVD link : CVE-2025-21639

Mitre link : CVE-2025-21639

CVE.ORG link : CVE-2025-21639

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-476

NULL Pointer Dereference