5.5

CVE-2025-21638

sctp: sysctl: auth_enable: avoid using current->nsproxy

In the Linux kernel, the following vulnerability has been resolved:

sctp: sysctl: auth_enable: 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, but that would
increase the size of this fix, while 'sctp.ctl_sock' still needs to be
retrieved from 'net' structure.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.10.41 < 3.11
Linux ≫ Linux Kernel Version >= 3.12.20 < 3.13
Linux ≫ Linux Kernel Version >= 3.14.5 < 5.4.290
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.234
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.177
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.125
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.72
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.10
Linux ≫ Linux Kernel Version6.13 Updaterc1
Linux ≫ Linux Kernel Version6.13 Updaterc2
Linux ≫ Linux Kernel Version6.13 Updaterc3
Linux ≫ Linux Kernel Version6.13 Updaterc4
Linux ≫ Linux Kernel Version6.13 Updaterc5
Linux ≫ Linux Kernel Version6.13 Updaterc6
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.23% 0.137
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/15649fd5415eda664ef35780c2013adeb5d9c695
Patch
https://git.kernel.org/stable/c/1b67030d39f2b00f94ac1f0af11ba6657589e4d3
Patch
https://git.kernel.org/stable/c/7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6
Patch
https://git.kernel.org/stable/c/bd2a2939423566c654545fa3e96a656662a0af9e
Patch
https://git.kernel.org/stable/c/c184bc621e3cef03ac9ba81a50dda2dae6a21d36
Patch
https://git.kernel.org/stable/c/dc583e7e5f8515ca489c0df28e4362a70eade382
Patch
https://git.kernel.org/stable/c/cf387cdebfaebae228dfba162f94c567a67610c3
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
https://cert-portal.siemens.com/productcert/html/ssa-265688.html