{"id":"CVE-2026-23434","title":"mtd: rawnand: serialize lock/unlock against other NAND operations","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: rawnand: serialize lock/unlock against other NAND operations\n\nnand_lock() and nand_unlock() call into chip->ops.lock_area/unlock_area\nwithout holding the NAND devi…","severity":"high","cvss":7.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < 28ea836cc44cb8b89c1c174707ead0c1133c60e9","Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < fe4a73c3dd48308149d57a10c2761e1d36ced7ba","Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < ce5229e78078e437704157eb542f43a6f83b429b","Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < a80291e577b44593a724d6cd64c14337c78f194d","Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2","Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < 5fd5c078af23cb353507aa522e09d557d7eaef04","Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < f25446e2c28939753d3b62d34dfda49952b2557d","Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < bab2bc6e850a697a23b9e5f0e21bb8c187615e95","Linux 5.7"],"published":"2026-04-03","updated":"2026-09-08","sourceUpdated":"2026-09-08T08:46:09.470Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23434","references":[{"url":"https://git.kernel.org/stable/c/28ea836cc44cb8b89c1c174707ead0c1133c60e9"},{"url":"https://git.kernel.org/stable/c/fe4a73c3dd48308149d57a10c2761e1d36ced7ba"},{"url":"https://git.kernel.org/stable/c/ce5229e78078e437704157eb542f43a6f83b429b"},{"url":"https://git.kernel.org/stable/c/a80291e577b44593a724d6cd64c14337c78f194d"},{"url":"https://git.kernel.org/stable/c/f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2"},{"url":"https://git.kernel.org/stable/c/5fd5c078af23cb353507aa522e09d557d7eaef04"},{"url":"https://git.kernel.org/stable/c/f25446e2c28939753d3b62d34dfda49952b2557d"},{"url":"https://git.kernel.org/stable/c/bab2bc6e850a697a23b9e5f0e21bb8c187615e95"}],"tags":["cve.org"],"epss":0.00132,"epssPercentile":0.03166,"ingestedAt":"2026-09-08T15:33:26.992Z","slug":"CVE-2026-23434","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmtd: rawnand: serialize lock/unlock against other NAND operations\n\nnand_lock() and nand_unlock() call into chip->ops.lock_area/unlock_area\nwithout holding the NAND device lock. On controllers that implement\nSET_FEATURES via multiple low-level PIO commands, these can race with\nconcurrent UBI/UBIFS background erase/write operations that hold the\ndevice lock, resulting in cmd_pending conflicts on the NAND controller.\n\nAdd nand_get_device()/nand_release_device() around the lock/unlock\noperations to serialize them against all other NAND controller access.\n\n## Affected\n\n- `Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < 28ea836cc44cb8b89c1c174707ead0c1133c60e9`\n- `Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < fe4a73c3dd48308149d57a10c2761e1d36ced7ba`\n- `Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < ce5229e78078e437704157eb542f43a6f83b429b`\n- `Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < a80291e577b44593a724d6cd64c14337c78f194d`\n- `Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2`\n- `Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < 5fd5c078af23cb353507aa522e09d557d7eaef04`\n- `Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < f25446e2c28939753d3b62d34dfda49952b2557d`\n- `Linux >= 92270086b7e5ada7ab381c06cc3da2e95ed17088 < bab2bc6e850a697a23b9e5f0e21bb8c187615e95`\n- `Linux 5.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":39.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}