Bug 2536140 (CVE-2026-90434) - CVE-2026-90434 kernel: isofs: release zisofs block pointer buffer head
Summary: CVE-2026-90434 kernel: isofs: release zisofs block pointer buffer head
Keywords:
Status: NEW
Alias: CVE-2026-90434
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 16:39 UTC by OSIDB Bzimport
Modified: 2026-10-05 18:57 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-09-17 16:39:42 UTC 
In the Linux kernel, the following vulnerability has been resolved:

isofs: release zisofs block pointer buffer head

zisofs_fill_pages() reads the compressed block pointer table.  The error
paths release the current buffer_head, the loop also releases the old
buffer_head when it advances. However, the success path leaves the last
buffer_head referenced. Release it before returning success.
Comment 1 gkamathe 2026-09-20 02:42:02 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90434.mbox
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