CVE-2026-23437
- Source
- https://cve.org/CVERecord?id=CVE-2026-23437
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23437.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-23437
- Downstream
- Related
- Published
- 2026-04-03T15:15:22.048Z
- Modified
- 2026-07-15T01:49:20.110342823Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- net: shaper: protect late read accesses to the hierarchy
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: shaper: protect late read accesses to the hierarchy
We look up a netdev during prep of Netlink ops (pre- callbacks) and take a ref to it. Then later in the body of the callback we take its lock or RCU which are the actual protections.
This is not proper, a conversion from a ref to a locked netdev must include a liveness check (a check if the netdev hasn't been unregistered already). Fix the read cases (those under RCU). Writes needs a separate change to protect from creating the hierarchy after flush has already run.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23437.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/0f9ea7141f365b4f27226898e62220fb98ef8dc6
- https://git.kernel.org/stable/c/348758ba74e6a348299965b16a97cfb817545cc0
- https://git.kernel.org/stable/c/581eee0890a8bde44f1fb78ad3e70502a897d583
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23437.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-23437
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git