CVE-2026-98833: mtd: core: call _get_device() with the master MTD

Severity: unknown
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-18 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: mtd: core: call _get_device() with the master MTD __get_mtd_device() calls the master's _get_device() callback with mtd, which may be a partition. __put_mtd_device() passes the master. This breaks gluebi partitions because gluebi_get_device() uses container_of() and therefore requires the master MTD. Pass the master to _get_device(), matching _put_device().

Affected products

Linux: 5.7 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/12b31d1acd20b3185bb5f0748db0cf6874c8e9d1
https://git.kernel.org/stable/c/522e821e41654eb06d2f21ac78a0f22fb6b198c2
https://git.kernel.org/stable/c/95c8f36293c22d450c371167ad4f9a5bbadc7539
https://git.kernel.org/stable/c/d94731cafa57e2c986ff391122d1494e5a3f3c3f
https://git.kernel.org/stable/c/dc482a281a19a7d7e91ad1b2d551bb301c54d0e6
https://git.kernel.org/stable/c/e7e37358408b0690c367cf38aec81a9b7e2475b5
https://git.kernel.org/stable/c/f971f1c63cf71579258360a12bd185bc1cd1a043

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