CVE-2026-80588
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Linux
PublishedAug 26, 2026
First seenAug 26, 2026
How to fix
Update
- Linux Linux473f1a5ab2abc98dd9e74b95b9c23c66c47535cc, 8277f48a06d3aa1441f6d0b6998ccc0360d30ed8, 41b49a8b914ec7dcb03eae93fb27f3c464078644, 6.18.46 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | a84164847b1e0a106ebc46821e5d2f9b775c9dc8 ≤ v < 473f1a5ab2abc98dd9e74b95b9c23c66c47535cc, 9db5b3cec4ec1c0cd3239689f5c8653d691a1754 ≤ v < 8277f48a06d3aa1441f6d0b6998ccc0360d30ed8, 9db5b3cec4ec1c0cd3239689f5c8653d691a1754 ≤ v < 41b49a8b914ec7dcb03eae93fb27f3c464078644, 6.18.35 ≤ v < 6.18.46, 6.19 | 473f1a5ab2abc98dd9e74b95b9c23c66c47535cc, 8277f48a06d3aa1441f6d0b6998ccc0360d30ed8, 41b49a8b914ec7dcb03eae93fb27f3c464078644, 6.18.46 |
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