mptcp: reclaim forward-allocated memory on RX path errors

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80588
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-26 15:17:15 UTC
Updated2026-08-27 06:17:46 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: mptcp: reclaim forward-allocated memory on RX path errors After commit 9db5b3cec4ec ("mptcp: borrow forward memory from subflow"), errors in the receive path prior to queueing skbs into the receive queue do not trigger forward-allocated memory reclaiming. Prevent forward memory from growing unboundedly in pathological drop scenarios by explicitly reclaiming memory when skbs are dropped.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.003390000 probability, percentile 0.264780000 (date 2026-08-27)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a84164847b1e0a106ebc46821e5d2f9b775c9dc8 473f1a5ab2abc98dd9e74b95b9c23c66c47535cc git Not specified
CNA Linux Linux affected 9db5b3cec4ec1c0cd3239689f5c8653d691a1754 8277f48a06d3aa1441f6d0b6998ccc0360d30ed8 git Not specified
CNA Linux Linux affected 9db5b3cec4ec1c0cd3239689f5c8653d691a1754 41b49a8b914ec7dcb03eae93fb27f3c464078644 git Not specified
CNA Linux Linux affected 6.18.35 6.18.46 semver Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 6.18.46 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.10 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8277f48a06d3aa1441f6d0b6998ccc0360d30ed8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/473f1a5ab2abc98dd9e74b95b9c23c66c47535cc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/41b49a8b914ec7dcb03eae93fb27f3c464078644 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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