VDB
DEBIAN-CVE-2026-31664
DEBIAN-CVE-2026-31664
PUBLISHED
CVSS 5.5 MEDIUM
In the Linux kernel, the following vulnerability has been resolved: xfrm: clear trailing padding in build_polexpire() build_expire() clears the trailing padding bytes of struct xfrm_user_expire after setting the hard field via memset_after(), but the analogous function build_polexpire() does not do this for struct xfrm_user_polexpire. The padding bytes after the __u8 hard field are left uninitialized from the heap allocation, and are then sent to userspace via netlink multicast to XFRMNLGRP_EXPIRE listeners, leaking kernel heap memory contents. Add the missing memset_after() call, matching build_expire().
Risk Scores
CVSS 3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | linux | 0, 6.12.38-1, 6.12.41-1 |
| Debian:11 | linux | 5.16.7-2, 5.14.12-1, 5.14.16-1 |
| Debian:13 | linux | 6.12.38-1, 6.12.43-1~bpo12+1, 6.12.48-1 |
| Debian:11 | linux-6.1 | 6.1.106-3, 6.1.106-3, 6.1.106-3 |
| Debian:12 | linux | 6.10.9-1, 6.11-1~exp1, 6.11.10-1~bpo12+1 |
Exploit Intelligence
- CVE-2026-31664.json (github-poc)
- 4694.0.0.yml (github-poc)
Timeline
- Apr 24, 2026 CVE Published
- May 2, 2026 CVE Updated