CVE-2026-63867
Public on 2026-07-19
Modified on 2026-07-24
Description
In the Linux kernel, the following vulnerability has been resolved:
mptcp: close TOCTOU race while computing rcv_wnd
mptcp: close TOCTOU race while computing rcv_wnd
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Kernel-5.15 Extra | kernel | 2026-07-20 | ALAS2KERNEL-5.15-2026-110 | Fixed |
| Amazon Linux 2 - Core | kernel | Not Affected | ||
| Amazon Linux 2 - Kernel-5.10 Extra | kernel | Not Affected | ||
| Amazon Linux 2 - Kernel-5.4 Extra | kernel | Not Affected | ||
| Amazon Linux 2023 | kernel | 2026-07-07 | ALAS2023-2026-1924 | Fixed |
| Amazon Linux 2023 | kernel6.12 | 2026-07-20 | ALAS2023-2026-1968 | Fixed |
| Amazon Linux 2023 | kernel6.18 | 2026-07-07 | ALAS2023-2026-1925 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |