Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L L N U H N H 7.1 .0048 39.5 —
AFFECTED Product Versions Fixed Linux 64b9cea7a0afe579dd2682f1f1c04f2e4e72fd25 – — Linux 5.12 – 5.12.10
TIMELINE Mar 4 Reserved by Linux Mar 15 Published (CNA: Linux) Aug 4 RESCORED — CVE-2021-47132 (Linux). CVSS 7.5 → 7.1 (NVD).
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix sk_forward_memory corruption on retransmission MPTCP sk_forward_memory handling is a bit special, as such field is protected by the msk socket spin_lock, instead of the plain socket lock. Currently we have a code path updating such field without handling the relevant lock: __mptcp_retrans() -> __mptcp_clean_una_wakeup() Several helpers in __mptcp_clean_una_wakeup() will update sk_forward_alloc, possibly causing such field corruption, as reported by Matthieu. Address the issue providing and using a new variant of blamed function which explicitly acquires the msk spin lock.
| Date | Event | Detail |
|---|---|---|
| March 4, 2024 | Reserved | Reserved by Linux |
| March 15, 2024 | Published | Published (CNA: Linux) |
| August 4, 2026 | RESCORED | RESCORED — CVE-2021-47132 (Linux). CVSS 7.5 → 7.1 (NVD). |
Authoritative record: CVE-2021-47132 at cve.org
Vendors: linux
Weaknesses: CWE-787
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-47132 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.