Medium 5.5Published Apr 24, 2026

CVE-2026-31651mmc: vub300: fix NULL-deref on disconnect

Updated under an hour ago (Oct 28, 2026, 8:00 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: mmc: vub300: fix NULL-deref on disconnect Make sure to deregister the controller before dropping the reference to the driver data on disconnect to avoid NULL-pointer dereferences or use-after-free.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
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 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 88095e7b473a3d9ec3b9c60429576e9cbd327c89 before 6446516e626ce7c44bdadbcbb3d7677a2c52ce93; from 88095e7b473a3d9ec3b9c60429576e9cbd327c89 before ba3b9429de94958dc0060d9816a915dd75c34919; 88095e7b473a3d9ec3b9c60429576e9cbd327c89 builds before 517b58e1d067115f80d198feee10192da4c424d0; 88095e7b473a3d9ec3b9c60429576e9cbd327c89 builds before 6468cab1173f44f7a4b7a05ce8abfdfd1ce1557a; 88095e7b473a3d9ec3b9c60429576e9cbd327c89 builds before 53f2642d77ab5f1f303388bff5500363c6cf962c; from 88095e7b473a3d9ec3b9c60429576e9cbd327c89 before c83a282615d8f7ba28cebddd54600b419d562d82; 88095e7b473a3d9ec3b9c60429576e9cbd327c89 builds before 8d09e75759cb2afc0732acfb5a14a93c03805a61; from 88095e7b473a3d9ec3b9c60429576e9cbd327c89 before dff34ef879c5e73298443956a8b391311ba78d57	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 3.0.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.169; from 6.2 before 6.6.135; from 6.7 before 6.12.82; from 6.13 before 6.18.23; from 6.19 before 6.19.13; 3.0; and 7 more ranges	NVD

References

References

https://git.kernel.org/stable/c/6446516e626ce7c44bdadbcbb3d7677a2c52ce93	patch
https://git.kernel.org/stable/c/ba3b9429de94958dc0060d9816a915dd75c34919	patch
https://git.kernel.org/stable/c/517b58e1d067115f80d198feee10192da4c424d0	patch
https://git.kernel.org/stable/c/6468cab1173f44f7a4b7a05ce8abfdfd1ce1557a	patch
https://git.kernel.org/stable/c/53f2642d77ab5f1f303388bff5500363c6cf962c	patch
https://git.kernel.org/stable/c/c83a282615d8f7ba28cebddd54600b419d562d82	patch
https://git.kernel.org/stable/c/8d09e75759cb2afc0732acfb5a14a93c03805a61	patch
https://git.kernel.org/stable/c/dff34ef879c5e73298443956a8b391311ba78d57	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.