How to Fix CVE-2026-23411: Linux (Bundle Sibling)
*By Sai Kiran Pandrala*
Last verified: 2026-05-25
| Severity | CVSS 7.8, High |
|---|---|
| Actively exploited? | No |
| Affected | Linux (c961ee5f21b202dea60b63eeef945730d92e46a6 < a92c5e5086a87d082696245a8607666da3d80554, c961ee5f21b202dea60b63eeef945730d92e46a6 < 667df93769c02ff581c77d2d8f162147e719c557); Linux (4.13, 0 < 4.13) |
| Fixed in | Same patched build as CVE-2026-23401 |
| Type (CWE) | Not verified |
CVE-2026-23411 is a sibling vulnerability in the same Linux Linux advisory bundle as CVE-2026-23401. The same patched build closes every CVE in the bundle, so the remediation procedure for CVE-2026-23411 matches the primary write-up.
What is different about CVE-2026-23411?
In the Linux kernel, the following vulnerability has been resolved:
apparmor: fix race between freeing data and fs accessing it
AppArmor was putting the reference to i_private data on its end after
removing the original entry from the file system. However the inode
can aand does live beyond that point and it is possible that some of
the fs call back functions will be invoked after the reference has
been put, which results in a race between freeing the data and
accessing it through the fs. W...
Impact is consistent with the bundle: compromise of the affected component as described in the vendor advisory. The patched build closes every code path in the advisory in one update.
How to fix CVE-2026-23411
Apply the patched build per the primary write-up: How to Fix CVE-2026-23401.
For a quick check, confirm the running version of Linux:
# Confirm the installed version via your package manager
dpkg -l | grep -i linux # Debian/Ubuntu
rpm -qa | grep -i linux # RHEL/CentOS/Rocky
Frequently asked questions
Is CVE-2026-23411 being actively exploited?
Not at the time of writing. It is not listed in CISA's Known Exploited Vulnerabilities catalog. That status can change, so monitor the vendor advisory and the KEV catalog if the system is exposed.
How severe is CVE-2026-23411?
CVSS rates it 7.8 (High). Use that score to set your patch priority alongside the other items in your queue.
Do I have to take Linux offline to apply the patch?
It depends on the deployment. High-availability or clustered installs can usually patch one node at a time with no full outage. Standalone installs typically need a short restart. Always follow the vendor's documented upgrade steps.
What if my vulnerability scanner still flags CVE-2026-23411 after I patch?
Re-run the scan after a service restart, then confirm the scanner's plugin set is up to date. Some scanners detect by banner version only and lag the official fix metadata by a release.
References
- Official vendor advisory: https://git.kernel.org/stable/c/a92c5e5086a87d082696245a8607666da3d80554
- NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2026-23411
- CISA KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
- Primary write-up: How to Fix CVE-2026-23401
*Written by Sai Kiran Pandrala. Last verified 2026-05-25. Part of the Linux Linux advisory bundle. Full procedure at how-to-fix-cve-2026-23401.*