CVE-2026-90434
Published Sep 17, 2026
Description
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.
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References
Other References
https://git.kernel.org/stable/c/0c2c54a7d174edc845f7bae24179fe72a926d10f
https://git.kernel.org/stable/c/106e1a3b2b3454fbda63a59e9290cb9a253f81aa
https://git.kernel.org/stable/c/2f7dd9b86fe4076059e6a4a2a2c5d565afd76b9e
https://git.kernel.org/stable/c/3371d30a97a257b7b5f2c8009612e9d452180f0a
https://git.kernel.org/stable/c/5677737c2cedf417c0fcf61540b9cef0e62273d4
https://git.kernel.org/stable/c/dbcc7d1b818162aeab2e97fd217d86546d9fde15
https://git.kernel.org/stable/c/ec33e6b7a1de20d7e623b12633191a855445657d
https://git.kernel.org/stable/c/f2a1611065c700a374b31c5cc8a7587f5e3bfe73
Frequently Asked Questions
What is CVE-2026-90434? +
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.
How do I check if I'm vulnerable to CVE-2026-90434? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.