CVE-2026-90150 pnfs/blocklayout: Fix device leaks on parse failure
A memory leak in the Linux kernel's pnfs/blocklayout module allows attackers to cause denial of service via crafted parse failures.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90150?
CVE-2026-90150 is a memory corruption vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
pnfs/blocklayout: Fix device leaks on parse failure
bl_parse_concat() and bl_parse_stripe() allocate a child device array and then parse each child in turn. If parsing a child fails, the failed child is not counted in nr_children and the parent may be left with a children array that bl_free_device() will not release when nr_children is zero.
Release the failed child and the already parsed children before returning the error. Also make bl_free_device() release the child array whenever the children pointer is set, so that partially initialised concat or stripe devices are cleaned up correctly.
bl_parse_scsi() can also fail after assigning d->bdev_file and dropping the file reference. Clear the pointer after fput() so that an outer cleanup path does not put it again.
Which versions are affected by CVE-2026-90150?
How do I fix CVE-2026-90150?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-90150 being exploited?
There is no known exploitation of CVE-2026-90150 in the wild and no public exploit code.
Sources
Also known as AZL-102081, BELL-CVE-2026-90150, DEBIAN-CVE-2026-90150, GHSA-qj3f-qfg4-pxhf, UBUNTU-CVE-2026-90150.