CVE-2026-89952
In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: validate ONFI extended parameter page sections nand_flash_detect_ext_param_page() allocates the length declared by the ONFI parameter page, then treats the data as a fixed header followed by variable-length sections. It reads that header and advances over sections without first proving that the fixed page and each current section fit in the allocation. Reject pages shorter than the fixed header, track the remaining variable area while walking sections, and require the ECC section to contain every field read from struct onfi_ext_ecc_info. Use device-scoped diagnostics that identify the malformed ONFI section.
Affected versions
Linux kernel versions
3.12
and later are affected. Fixed in
5.10.270,
5.15.221,
6.1.188,
6.6.157,
6.12.110,
6.18.51,
7.2.5,
7.3-rc1
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-89952?
CVE-2026-89952 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.12 onward and has been patched in 5.10.270, 5.15.221, 6.1.188 and others. CVE-2026-89952 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-89952?
Yes. CVE-2026-89952 has been patched. Fixed versions include 5.10.270, 5.15.221, 6.1.188 and others. If you are running Linux kernel 3.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-89952 actively exploited?
No. CVE-2026-89952 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.