7.1

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

Modified
AliasesUBUNTU-CVE-2026-23434DEBIAN-CVE-2026-23434
Published 03-04-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-23434 is a high (CVSS 7.1) vulnerability in linux. EPSS estimates a 0.11% chance of exploitation in the next 30 days, higher than 1.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.11%
0%100%
Low · -0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 29 · Related 29
SUSE-SU-2026:21834-1SUSE-SU-2026:2238-1USN-8567-1USN-8574-1USN-8574-2USN-8574-3

Timeline

  1. 03-04-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.11%

Chance of exploitation in the next 30 days

Percentile

1%

Versus all other CVEs

30-day change

Decrease -0.02 pp

From 0.13% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu145 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 92270086b7e5ada7ab381c06cc3da2e95ed17088, < 28ea836cc44cb8b89c1c174707ead0c1133c60e9 | ≥ 92270086b7e5ada7ab381c06cc3da2e95ed17088, < fe4a73c3dd48308149d57a10c2761e1d36ced7ba | ≥ 92270086b7e5ada7ab381c06cc3da2e95ed17088, < ce5229e78078e437704157eb542f43a6f83b429b | ≥ 92270086b7e5ada7ab381c06cc3da2e95ed17088, < a80291e577b44593a724d6cd64c14337c78f194d | ≥ 92270086b7e5ada7ab381c06cc3da2e95ed17088, < f71ce0ae5aefe39dd5b2f996c0e08550d2153ad2 | ≥ 92270086b7e5ada7ab381c06cc3da2e95ed17088, < 5fd5c078af23cb353507aa522e09d557d7eaef04 | ≥ 92270086b7e5ada7ab381c06cc3da2e95ed17088, < f25446e2c28939753d3b62d34dfda49952b2557d | ≥ 92270086b7e5ada7ab381c06cc3da2e95ed17088, < bab2bc6e850a697a23b9e5f0e21bb8c187615e95 | 5.7
  • linux_kernel≥ 5.7.1, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.167 | ≥ 6.2, < 6.6.130 | ≥ 6.7, < 6.12.78 | ≥ 6.13, < 6.18.20 | ≥ 6.19, < 6.19.10 | 5.7 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.10-1

3 vendors · 148 products

References

42 links
Show all 42 references