Description
In the Linux kernel, the following vulnerability has been resolved: mptcp: ensure snd_una is properly initialized on connect This is strictly related to commit fb7a0d334894 ("mptcp: ensure snd_nxt is properly initialized on connect"). It turns out that syzkaller can trigger the retransmit after fallback and before processing any other incoming packet - so that snd_una is still left uninitialized. Address the issue explicitly initializing snd_una together with snd_nxt and write_seq.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
8fd738049ac3d67a937d36577763b47180aae1ad to < 208cd22ef5e57f82d38ec11c1a1703f9401d6ddeaffected8fd738049ac3d67a937d36577763b47180aae1ad to < 7b9c7fc8600b64a86e4b47b2d190bba380267726affected8fd738049ac3d67a937d36577763b47180aae1ad to < f03c46eabb3a67bd2993e237ab5517f00a5f1813affected8fd738049ac3d67a937d36577763b47180aae1ad to < f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57faffected8fd738049ac3d67a937d36577763b47180aae1ad to < ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7ceaffected8fd738049ac3d67a937d36577763b47180aae1ad to < 8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3affected
Linux Linux
Default version status: affected
5.9affected0 to < 5.9unaffected5.10.221 to ≤ 5.10.*unaffected5.15.162 to ≤ 5.15.*unaffected6.1.95 to ≤ 6.1.*unaffected6.6.35 to ≤ 6.6.*unaffected6.9.6 to ≤ 6.9.*unaffected6.10 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/208cd22ef5e57f82d38ec11c1a1703f9401d6dde ↗
- https://git.kernel.org/stable/c/7b9c7fc8600b64a86e4b47b2d190bba380267726 ↗
- https://git.kernel.org/stable/c/f03c46eabb3a67bd2993e237ab5517f00a5f1813 ↗
- https://git.kernel.org/stable/c/f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57f ↗
- https://git.kernel.org/stable/c/ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7ce ↗
- https://git.kernel.org/stable/c/8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3 ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗