sctp: hold socket lock when dumping endpoints in sctp_diag

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72447
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:18 UTC
Updated2026-08-17 06:19:12 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: sctp: hold socket lock when dumping endpoints in sctp_diag SCTP_DIAG endpoint dumping was traversing endpoint address lists without holding lock_sock(), while those lists could change concurrently via socket operations (e.g., bindx changes). This creates a race where nla_reserve() counts addresses under RCU protection, but the subsequent copy may see fewer entries, potentially leaking uninitialized memory to userspace. Fix this by: - Taking a reference on each endpoint during hash traversal - Moving socket operations (lock_sock()) outside read_lock_bh() - Serializing address list access during dump - Reworking sctp_for_each_endpoint() to support restart-based traversal with (net, pos) tracking Also: - Add WARN_ON_ONCE() for inconsistent address counts - Fix idiag_states filtering for LISTEN vs association cases - Skip dumping endpoints being freed (ep->base.dead) - Move dump position tracking into iterator, removing cb->args[4] and its comment for sctp_ep_dump()., - Update the comment for cb->args[4] and remove the comment for unused cb->args[5] for sctp_sock_dump(). Note: traversal is restart-based and may re-scan buckets multiple times, but this is acceptable due to small bucket sizes and required to support sleeping-safe callbacks. This issue was reported by Nico Yip (@_cyeaa_) working with TrendAI Zero Day Initiative.

Risk And Classification

EPSS: 0.002200000 probability, percentile 0.127040000 (date 2026-08-17)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8f840e47f190cbe61a96945c13e9551048d42cef f98c294a9369b6fe89e652c06357ee594be4dfa2 git Not specified
CNA Linux Linux affected 8f840e47f190cbe61a96945c13e9551048d42cef 8b38e3dcfde3077dbc03eb8ef88e03cc19f70b8a git Not specified
CNA Linux Linux affected 8f840e47f190cbe61a96945c13e9551048d42cef ec3c2d59a192e17e1014ba71afc368ba162ecac3 git Not specified
CNA Linux Linux affected 8f840e47f190cbe61a96945c13e9551048d42cef 722576aba0a6d9423714550b1c03239b0f0def77 git Not specified
CNA Linux Linux affected 8f840e47f190cbe61a96945c13e9551048d42cef abe7f8828e6ac8be858870c2bf836258844f97d5 git Not specified
CNA Linux Linux affected 8f840e47f190cbe61a96945c13e9551048d42cef 207bb4ce8fe7de961ae7bb33569ad2cd61f44954 git Not specified
CNA Linux Linux affected 8f840e47f190cbe61a96945c13e9551048d42cef f09a245f33e567b604efa1960b7a2d25dd9c8713 git Not specified
CNA Linux Linux affected 8f840e47f190cbe61a96945c13e9551048d42cef 7d8297e26b4e20b5d1c3c3fe51fe81a1c7fbc823 git Not specified
CNA Linux Linux affected 4.7 Not specified
CNA Linux Linux unaffected 4.7 semver Not specified
CNA Linux Linux unaffected 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ec3c2d59a192e17e1014ba71afc368ba162ecac3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f09a245f33e567b604efa1960b7a2d25dd9c8713 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/722576aba0a6d9423714550b1c03239b0f0def77 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7d8297e26b4e20b5d1c3c3fe51fe81a1c7fbc823 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/207bb4ce8fe7de961ae7bb33569ad2cd61f44954 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/abe7f8828e6ac8be858870c2bf836258844f97d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8b38e3dcfde3077dbc03eb8ef88e03cc19f70b8a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f98c294a9369b6fe89e652c06357ee594be4dfa2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report