CVE-2026-80588

HighCVSS 7.5/10Last modified Oct 16, 2026

Description

In 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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= a84164847b1e0a106ebc46821e5d2f9b775c9dc8, < 473f1a5ab2abc98dd9e74b95b9c23c66c47535cc; >= 9db5b3cec4ec1c0cd3239689f5c8653d691a1754, < 8277f48a06d3aa1441f6d0b6998ccc0360d30ed8; >= 9db5b3cec4ec1c0cd3239689f5c8653d691a1754, < 41b49a8b914ec7dcb03eae93fb27f3c464078644; >= 6.18.35, < 6.18.46
LinuxLinux6.19

References

Timeline

Published
Aug 26, 2026
Last modified
Oct 16, 2026
NVD status
Received

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CVE-2026-80588: High severity, CVSS 7.5 | Vulnix