CVE-2026-23434
In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: serialize lock/unlock against other NAND operations nand_lock() and nand_unlock() call into chip->ops.lock_area/unlock_area without holding the NAND device lock.
Does this matter?
Lower severity and a low EPSS score (0.13%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: mtd: rawnand: serialize lock/unlock against other NAND operations nand_lock() and nand_unlock() call into chip->ops.lock_area/unlock_area without holding the NAND device lock. On controllers that implement SET_FEATURES via multiple low-level PIO commands, these can race with concurrent UBI/UBIFS background erase/write operations that hold the device lock, resulting in cmd_pending conflicts on the NAND controller. Add nand_get_device()/nand_release_device() around the lock/unlock operations to serialize them against all other NAND controller access.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/28ea836cc44cb8b89c1c174707ead0c1133c60e9Patch
- https://git.kernel.org/stable/c/5fd5c078af23cb353507aa522e09d557d7eaef04Patch
- https://git.kernel.org/stable/c/a80291e577b44593a724d6cd64c14337c78f194dPatch
- https://git.kernel.org/stable/c/bab2bc6e850a697a23b9e5f0e21bb8c187615e95Patch
- https://git.kernel.org/stable/c/ce5229e78078e437704157eb542f43a6f83b429bPatch
- https://git.kernel.org/stable/c/f25446e2c28939753d3b62d34dfda49952b2557dPatch
- https://git.kernel.org/stable/c/f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2Patch
- https://git.kernel.org/stable/c/fe4a73c3dd48308149d57a10c2761e1d36ced7baPatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.