CVE-2026-23437: net: shaper: protect late read accesses to the hierarchy
Vendor fix available · Affected: Linux · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 2% of scored CVEs
DescriptionCVE.org
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.
Affected products2
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Linux · LinuxVersions not stated
- Linux · Linux6.13
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Linux
- Published
- April 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-23437 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.
References
- NVD entrynvd.nist.gov
- CVE recordcve.org
- Weakness CWE-662cwe.mitre.org
- git.kernel.org/stable/c/581eee0890a8bde44f1fb78ad3e70502a897d583git.kernel.org
- git.kernel.org/stable/c/348758ba74e6a348299965b16a97cfb817545cc0git.kernel.org
- git.kernel.org/stable/c/0f9ea7141f365b4f27226898e62220fb98ef8dc6git.kernel.org