CVE-2026-23474mtd: Avoid boot crash in RedBoot partition table parser
- 5.5MediumCVSS base score
- 0.15%Exploitation in 30 daysEPSS · top 96% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: mtd: Avoid boot crash in RedBoot partition table parser Given CONFIG_FORTIFY_SOURCE=y and a recent compiler, commit 439a1bcac648 ("fortify: Use __builtin_dynamic_object_size() when available") produces the warning below and an oops. Searching for RedBoot partition table in 50000000.flash at offset 0x7e0000 ------------[ cut here ]------------ WARNING: lib/string_helpers.c:1035 at 0xc029e04c, CPU#0: swapper/0/1 memcmp: detected buffer overflow: 15 byte read of buffer size 14 Modules linked in: CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.19.0 #1 NONE As Kees said, "'names' is pointing to the final 'namelen' many bytes of the allocation ... 'namelen' could be basically any length at all. This fortify warning looks legit to me -- this code used to be reading beyond the end of the allocation." Since the size of the dynamic allocation is calculated with strlen() we can use strcmp() instead of memcmp() and remain within bounds.
Timeline
ID reserved
By Linux
- 3 months later
· 3 months later
Published
- 7 months later
· 7 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.15% · top 96% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < ca235d11fc2fd8fce1dcd9d732dc780be0cde2de
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < e0065e106f798ce6862251bc4fc030ac5cead940
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 0b08be5aca212a99f8ba786fee4922feac08002c
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < d8570211a2b1ec886a462daa0be4e9983ac768bb
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 2025b2d1f9d5cad6ea6fe85654c6c41297c3130b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 75a4d8cfe7784f909b3bd69325abac8e04ecb385
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 8e2f8020270af7777d49c2e7132260983e4fc566
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 5.10.253 – ≤ 5.10.*
- unaffected 5.15.203 – ≤ 5.15.*
- unaffected 6.1.167 – ≤ 6.1.*
- unaffected 6.6.130 – ≤ 6.6.*
- unaffected 6.12.78 – ≤ 6.12.*
- unaffected 6.18.20 – ≤ 6.18.*
- unaffected 6.19.10 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References11
- https://git.kernel.org/stable/c/ca235d11fc2fd8fce1dcd9d732dc780be0cde2de (opens in a new tab)
- https://git.kernel.org/stable/c/e0065e106f798ce6862251bc4fc030ac5cead940 (opens in a new tab)
- https://git.kernel.org/stable/c/0b08be5aca212a99f8ba786fee4922feac08002c (opens in a new tab)
- https://git.kernel.org/stable/c/d8570211a2b1ec886a462daa0be4e9983ac768bb (opens in a new tab)
- https://git.kernel.org/stable/c/2025b2d1f9d5cad6ea6fe85654c6c41297c3130b (opens in a new tab)
- https://git.kernel.org/stable/c/c4054ad2d8bff4e8e937cd4a1d1a04c1e8f77a2c (opens in a new tab)
- https://git.kernel.org/stable/c/75a4d8cfe7784f909b3bd69325abac8e04ecb385 (opens in a new tab)
- https://git.kernel.org/stable/c/8e2f8020270af7777d49c2e7132260983e4fc566 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-18749 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-23474)Record last updated .