CVE-2021-47132 (GCVE-0-2021-47132)
Vulnerability from cvelistv5
Published
2024-03-15 20:14
Modified
2025-05-04 12:41
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 64b9cea7a0afe579dd2682f1f1c04f2e4e72fd25
Version: 64b9cea7a0afe579dd2682f1f1c04f2e4e72fd25
Version: 96db8ffef07516a6d7414b6988f2a4298a839977
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