CVE-2026-98320
Published: October 9, 2026Last modified: October 9, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: hold reference on ct until flow is released nf_ct_put() releases the ct->ext area inmediately, the rcu typesafe semantics also allow to refer to the wrong conntrack from the flowtable datapath. Hold reference on ct until flow is released after rcu grace period. Add rcu_barrier() on module exit path, to ensure pending flow entries are release before module goes away.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.189-r0) |
| 25 LTS | linux-lts | Fixed (6.12.112-r0) | |
| Stream | linux-lts | Fixed (6.18.55-r0) |
References
- https://git.kernel.org/stable/c/12c1ac230f4ca16e0017b62a963ab75e0b48074f
- https://git.kernel.org/stable/c/61c6688be282277c6e91ab286a7acd0ae8681ac6
- https://git.kernel.org/stable/c/8274cdc5f9c57e17ed77fc4ba76212536c840f25
- https://git.kernel.org/stable/c/93ff1594be1aad4da364462dd8db050ebcfda2de
- https://git.kernel.org/stable/c/a43cd2b67b91e943273c913237a7a88c50cdcfbc
- https://git.kernel.org/stable/c/d9e6175a3ee48209ee65f294fc567b4e16b29b74
- https://git.kernel.org/stable/c/e75a9fa1d44bcbd66ea02e8781bcca6ea4076e0d
- https://git.kernel.org/stable/c/eed6997e8dc40593a539fcc722e7ed51b18db86c