CVE-2026-89952

Description

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.

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EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/12a63a0f0d17b2d26211b2524ded91a67dd5c99c https://git.kernel.org/stable/c/1bf148fabe6463422195b7cc43b3412533f1dc21 https://git.kernel.org/stable/c/23e747fe585830c43095c37c85b2757231c6917f https://git.kernel.org/stable/c/86948f81964e40cd6472d76a6371e4f297d84db0 https://git.kernel.org/stable/c/c7df90bbda71549bfd981bf478ad04ddfccf4e0d https://git.kernel.org/stable/c/c8f86e375b39cada09fd8cb33dd3bb3641e84a62 https://git.kernel.org/stable/c/ddb6ddf5be7429bb98b3368c883be51f00b31678 https://git.kernel.org/stable/c/e5e415262330bd70f983e091d8919d9dcd99e475

Frequently Asked Questions

What is 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.

How do I check if I'm vulnerable to CVE-2026-89952? +

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.