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

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Summary

CVECVE-2025-21638
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-01-19 11:15:09 UTC
Updated2026-05-12 13:16:29 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-476

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b14878ccb7fac0242db82720b784ab62c467c0dc cf387cdebfaebae228dfba162f94c567a67610c3 git Not specified
CNA Linux Linux affected b14878ccb7fac0242db82720b784ab62c467c0dc dc583e7e5f8515ca489c0df28e4362a70eade382 git Not specified
CNA Linux Linux affected b14878ccb7fac0242db82720b784ab62c467c0dc bd2a2939423566c654545fa3e96a656662a0af9e git Not specified
CNA Linux Linux affected b14878ccb7fac0242db82720b784ab62c467c0dc 1b67030d39f2b00f94ac1f0af11ba6657589e4d3 git Not specified
CNA Linux Linux affected b14878ccb7fac0242db82720b784ab62c467c0dc 7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6 git Not specified
CNA Linux Linux affected b14878ccb7fac0242db82720b784ab62c467c0dc c184bc621e3cef03ac9ba81a50dda2dae6a21d36 git Not specified
CNA Linux Linux affected b14878ccb7fac0242db82720b784ab62c467c0dc 15649fd5415eda664ef35780c2013adeb5d9c695 git Not specified
CNA Linux Linux affected e5eae4a0511241959498b180fa0df0d4f1b11b9c git Not specified
CNA Linux Linux affected 88830f227a1f96e44d82ddfcb0cc81d517ec6dd8 git Not specified
CNA Linux Linux affected 3938b0336a93fa5faa242dc9e5823ac69df9e066 git Not specified
CNA Linux Linux affected 3.15 Not specified
CNA Linux Linux unaffected 3.15 semver Not specified
CNA Linux Linux unaffected 5.4.292 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.234 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.177 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.125 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.72 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.10 6.12.* semver Not specified
CNA Linux Linux unaffected 6.13 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1b67030d39f2b00f94ac1f0af11ba6657589e4d3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/03/msg00002.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/c184bc621e3cef03ac9ba81a50dda2dae6a21d36 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/15649fd5415eda664ef35780c2013adeb5d9c695 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/bd2a2939423566c654545fa3e96a656662a0af9e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cf387cdebfaebae228dfba162f94c567a67610c3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
lists.debian.org/debian-lts-announce/2025/03/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dc583e7e5f8515ca489c0df28e4362a70eade382 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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