High 7.1Published Apr 3, 2026

CVE-2026-23434mtd: rawnand: serialize lock/unlock against other NAND operations

Updated under an hour ago (Oct 28, 2026, 8:23 AM ET)

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It affects Linux and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness (CWE): CWE-362
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	92270086b7e5ada7ab381c06cc3da2e95ed17088 builds before 28ea836cc44cb8b89c1c174707ead0c1133c60e9; from 92270086b7e5ada7ab381c06cc3da2e95ed17088 before fe4a73c3dd48308149d57a10c2761e1d36ced7ba; from 92270086b7e5ada7ab381c06cc3da2e95ed17088 before ce5229e78078e437704157eb542f43a6f83b429b; from 92270086b7e5ada7ab381c06cc3da2e95ed17088 before a80291e577b44593a724d6cd64c14337c78f194d; from 92270086b7e5ada7ab381c06cc3da2e95ed17088 before f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2; 92270086b7e5ada7ab381c06cc3da2e95ed17088 builds before 5fd5c078af23cb353507aa522e09d557d7eaef04; from 92270086b7e5ada7ab381c06cc3da2e95ed17088 before f25446e2c28939753d3b62d34dfda49952b2557d; from 92270086b7e5ada7ab381c06cc3da2e95ed17088 before bab2bc6e850a697a23b9e5f0e21bb8c187615e95	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.6	CISA ADP
linux linux_kernel linux:linux_kernel	from 5.7.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.20; from 6.19 before 6.19.10; 5.7; and 7 more ranges	NVD

References

References

https://git.kernel.org/stable/c/28ea836cc44cb8b89c1c174707ead0c1133c60e9	patch
https://git.kernel.org/stable/c/fe4a73c3dd48308149d57a10c2761e1d36ced7ba	patch
https://git.kernel.org/stable/c/ce5229e78078e437704157eb542f43a6f83b429b	patch
https://git.kernel.org/stable/c/a80291e577b44593a724d6cd64c14337c78f194d	patch
https://git.kernel.org/stable/c/f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2	patch
https://git.kernel.org/stable/c/5fd5c078af23cb353507aa522e09d557d7eaef04	patch
https://git.kernel.org/stable/c/f25446e2c28939753d3b62d34dfda49952b2557d	patch
https://git.kernel.org/stable/c/bab2bc6e850a697a23b9e5f0e21bb8c187615e95	patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.