Bug 2536796 (CVE-2026-90150)

Summary: CVE-2026-90150 kernel: pnfs/blocklayout: Fix device leaks on parse failure
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's pnfs/blocklayout component. When parsing certain device layouts, specifically in the `bl_parse_concat()` and `bl_parse_stripe()` functions, a failure to parse a child device could result in the device not being properly released. This can lead to resource leaks, potentially causing system instability or a Denial of Service (DoS). Additionally, the `bl_parse_scsi()` function could fail in a way that leads to a double release of file references, further contributing to system instability.
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Description OSIDB Bzimport 2026-09-17 19:34:07 UTC 
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.
Comment 1 Keith Grant 2026-09-23 17:24:39 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90150.mbox