Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 64b9cea7a0afe579dd2682f1f1c04f2e4e72fd25 before b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3; affected 64b9cea7a0afe579dd2682f1f1c04f2e4e72fd25 before b5941f066b4ca331db225a976dae1d6ca8cf0ae3; affected 96db8ffef07516a6d7414b6988f2a4298a839977; affected 5.11.4 before 5.12 |
| Linux / Linux | affected 5.12; unaffected 0 before 5.12; unaffected 5.12.10 through 5.12.*; unaffected 5.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b9c78b1a95966a7bd2ddae05b73eafc0cda4fba3
- https://git.kernel.org/stable/c/b5941f066b4ca331db225a976dae1d6ca8cf0ae3
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.