CVE-2025-39764
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2025-09-11
Modified: 2026-11-10
First seen: 2026-11-05
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
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.
Affected Software (18)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < b05500444b8eb97644efdd180839a04a706be97c |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < bada48ad5b0590e318d0f79636ff62a2ef9f4955 |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < 64b7684042246e3238464c66894e30ba30c7e851 |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < 9e5021a906532ca16e2aac69c0607711e1c70b1f |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < 078d33c95bf534d37aa04269d1ae6158e20082d5 |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < a4d634ded4d3d400f115d84f654f316f249531c9 |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < 1492e3dcb2be3aa46d1963da96aa9593e4e4db5a |
| Linux | Linux | 2.6.23 |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < b05500444b8eb97644efdd180839a04a706be97c |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < bada48ad5b0590e318d0f79636ff62a2ef9f4955 |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < 64b7684042246e3238464c66894e30ba30c7e851 |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < 9e5021a906532ca16e2aac69c0607711e1c70b1f |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < 078d33c95bf534d37aa04269d1ae6158e20082d5 |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < a4d634ded4d3d400f115d84f654f316f249531c9 |
| Linux | Linux | cf6994c2b9812a9f02b99e89df411ffc5db9c779 < 1492e3dcb2be3aa46d1963da96aa9593e4e4db5a |
| Linux | Linux | 2.6.23 |
| linux | linux_kernel | 2.6.23 – 6.16.2 |
| linux | linux_kernel | 6.17 |