VDB
DEBIAN-CVE-2025-39764
DEBIAN-CVE-2025-39764
PUBLISHED
CVSS 5.5 MEDIUM
In the Linux kernel, the following vulnerability has been resolved: netfilter: ctnetlink: remove refcounting in expectation dumpers Same pattern as previous patch: do not keep the expectation object alive via refcount, only store a cookie value and then use that as the skip hint for dump resumption. AFAICS this has the same issue as the one resolved in the conntrack dumper, when we do if (!refcount_inc_not_zero(&exp->use)) to increment the refcount, there is a chance that exp == last, which causes a double-increment of the refcount and subsequent memory leak.
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:13 | linux | 6.12.63-1, 6.12.63-1, 6.12.69-1 |
| Debian:11 | linux-6.1 | 0, 6.1.106-3, 6.1.106-3 |
| Debian:14 | linux | 6.13.11-1~exp1, 6.13.2-1~exp1, 6.13.3-1~exp1 |
| Debian:12 | linux | 6.16.3-1~bpo13+1, 6.16.5-1, 6.16.6-1 |
| Debian:11 | linux | 5.14.6-3, 5.14.9-1, 5.14.9-2 |
Exploit Intelligence
- CVE-2025-39764.json (github-poc)
- 2026-05-06_426_linux-signed-amd64.yaml (github-poc)
Timeline
- Sep 11, 2025 CVE Published
- May 2, 2026 CVE Updated