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CVE PROGRAM SOURCE RECORD5.5 Medium

CVE-2025-21636

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

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: plpmtud_probe_interval: 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.probe_interval' is used.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • d1e462a7a5f359cbb9a0e8fbfafcfb6657034105 to < 1dc5da6c4178f3e4b95c631418f72de9f86c0449affected
  • d1e462a7a5f359cbb9a0e8fbfafcfb6657034105 to < 44ee8635922b6eb940faddb961a8347c6857d722affected
  • d1e462a7a5f359cbb9a0e8fbfafcfb6657034105 to < 284a221f8fa503628432c7bb5108277c688c6ffaaffected
  • d1e462a7a5f359cbb9a0e8fbfafcfb6657034105 to < bcf8c60074e81ed2ac2d35130917175a3949c917affected
  • d1e462a7a5f359cbb9a0e8fbfafcfb6657034105 to < 6259d2484d0ceff42245d1f09cc8cb6ee72d847aaffected

Linux Linux

Default version status: affected

  • 5.14affected
  • 0 to < 5.14unaffected
  • 5.15.177 to ≤ 5.15.*unaffected
  • 6.1.125 to ≤ 6.1.*unaffected
  • 6.6.72 to ≤ 6.6.*unaffected
  • 6.12.10 to ≤ 6.12.*unaffected
  • 6.13 to ≤ *unaffected

References