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CVE-2026-80588

mptcp: reclaim forward-allocated memory on RX path errors

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 6.18.46, 7.1.10
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From a84164847b1e0a106ebc46821e5d2f9b775c9dc8 · fixed in 473f1a5ab2abc98dd9e74b95b9c23c66c47535cc; From 9db5b3cec4ec1c0cd3239689f5c8653d691a1754 · fixed in 8277f48a06d3aa1441f6d0b6998ccc0360d30ed8; From 9db5b3cec4ec1c0cd3239689f5c8653d691a1754 · fixed in 41b49a8b914ec7dcb03eae93fb27f3c464078644; From 6.18.35 · fixed in 6.18.46

  • Linux Linux

    6.19

  • KernelLinux

    fixed in 6.18.46; From 6.19.0 · fixed in 7.1.10

References 3

git.kernel.org