CVE-2026-63971
In the Linux kernel, the following vulnerability has been resolved: sctp: fix race between sctp_wait_for_connect and peeloff sctp_wait_for_connect() drops and re-acquires the socket lock while waiting for the association to reach ESTABLISHED state.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: sctp: fix race between sctp_wait_for_connect and peeloff sctp_wait_for_connect() drops and re-acquires the socket lock while waiting for the association to reach ESTABLISHED state. During this window, another thread can peeloff the association to a new socket via getsockopt(SCTP_SOCKOPT_PEELOFF), changing asoc->base.sk. After re-acquiring the old socket lock, sctp_wait_for_connect() returns success without noticing the migration — the caller then accesses the association under the wrong lock in sctp_datamsg_from_user(). Add the same sk != asoc->base.sk check that sctp_wait_for_sndbuf() already has, returning an error if the association was migrated while we slept.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS 0.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://git.kernel.org/stable/c/0e0d5bc76fd4267a71334fcc8f1a5fbcf997845dPatch
- https://git.kernel.org/stable/c/6140cfa721451fa6e18e134e709703c2bf34d0fbPatch
- https://git.kernel.org/stable/c/634a9af8a26a84d8b0d7b3b643204b344b42d9fbPatch
- https://git.kernel.org/stable/c/68667ee4c7dadf7f63167234e2a1af09b3f7874ePatch
- https://git.kernel.org/stable/c/7d2038d4b80166f7bead8d07eba3b97405816c21Patch
- https://git.kernel.org/stable/c/8e9b56051d24540cfbf39194618708c4a7633549Patch
- https://git.kernel.org/stable/c/bcfeac79af740735ace44008b4a11b8e5add20f5Patch
- https://git.kernel.org/stable/c/f14fe6395a8b3d961a61e138ad7b36ba3626dd4ePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.