Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs() sashiko is reporting that trying to read /sys/kernel/debug/ref_tracker/* causes use-afer-free crash when either alloc_percpu() or dev_addr_init() in alloc_netdev_mqs() failed, for commit 4d92b95ff2f9 ("net: add net device refcount tracker infrastructure") added ref_tracker_dir_exit() to only free_netdev() path.
References
- https://git.kernel.org/stable/c/0b1c2af8a22c35cb099c735c2f63ea3ba757557d
- https://git.kernel.org/stable/c/2775bf36be7872834a7f8c0a0d9681a1a3e1cd4c
- https://git.kernel.org/stable/c/5fe03b5257095e2beef0bc79e1f068fbd09a24c7
- https://git.kernel.org/stable/c/63ab05e8f9654aa100d366c0236399fda6ffaab1
FAQ
What is CVE-2026-90135?
CVE-2026-90135 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs() sashiko is reporting that trying to read /sys/kernel/debug/ref_track...
How severe is CVE-2026-90135?
CVSS scoring is not yet available for CVE-2026-90135. Check NVD for updates.
Is there a patch for CVE-2026-90135?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.