CVE-2024-40931
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").
Does this matter?
Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.26% probability · 17th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-908
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/208cd22ef5e57f82d38ec11c1a1703f9401d6ddePatch
- https://git.kernel.org/stable/c/7b9c7fc8600b64a86e4b47b2d190bba380267726Patch
- https://git.kernel.org/stable/c/8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3Patch
- https://git.kernel.org/stable/c/ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7cePatch
- https://git.kernel.org/stable/c/f03c46eabb3a67bd2993e237ab5517f00a5f1813Patch
- https://git.kernel.org/stable/c/f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57fPatch
- https://git.kernel.org/stable/c/208cd22ef5e57f82d38ec11c1a1703f9401d6ddePatch
- https://git.kernel.org/stable/c/7b9c7fc8600b64a86e4b47b2d190bba380267726Patch
- https://git.kernel.org/stable/c/8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3Patch
- https://git.kernel.org/stable/c/ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7cePatch
- https://git.kernel.org/stable/c/f03c46eabb3a67bd2993e237ab5517f00a5f1813Patch
- https://git.kernel.org/stable/c/f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57fPatch
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.