Not rated
CVE-2025-39764 netfilter: ctnetlink: remove refcounting in expectation dumpers
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 products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 6.17 | earliest → < 6.17 | 6.17 |
| Linux 6.16 | earliest → < 6.16.2 | 6.16.2 |
| Linux 6.12 | earliest → < 6.12.78 | 6.12.78 |
| Linux 6.6 | earliest → < 6.6.130 | 6.6.130 |
| Linux 6.1 | earliest → < 6.1.167 | 6.1.167 |
| Linux 5.15 | earliest → < 5.15.203 | 5.15.203 |
| Linux 5.10 | earliest → < 5.10.253 | 5.10.253 |
| Linux | 2.6.23 | No fix stated |
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.7 → latest | No fix stated |
Show the 2 other branches Hide the 2 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 | 3.1.7 → latest | No fix stated |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.7 → latest | No fix stated |
Other CVEs of Linux
The 18286 CVEs of Linux →
CVE-2026-100082
xen-blkback: Avoid UAF when reading I/O statistics
Not rated
CVE-2026-100081
xen-netback: defer xenvif_mcast_addr_list_free()
Not rated
CVE-2026-100080
xen-netback: Fix UAF when reading statistics data
Not rated
CVE-2026-99270
tcp: Fix potential UAF in reqsk_timer_handler().
8.1
High