Medium 5.5Published Jun 26, 2026

CVE-2026-53295mailbox: add sanity check for channel array

Updated under an hour ago (Oct 28, 2026, 4:30 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: mailbox: add sanity check for channel array Fail gracefully if there is no channel array attached to the mailbox controller. Otherwise the later dereference will cause an OOPS which might not be seen because mailbox controllers might instantiate very early. Remove the comment explaining the obvious while here.

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 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c before 5cc3300fab262b26c28bc2fc06df693410c3840b; 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c builds before 0f11444271110d9b5bc6316a153c6431abda899c; from 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c before d44872a569b8fbacde457ff2587a775e5004bb79; from 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c before 14aed0d4e58389cc6a88acf8610b12d3e476272b; from 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c before 6362c4a7d7e21e68cd9aa04df7cde16befba3a4b; from 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c before 9dd7489943324298bb0f385495795a82f1dd6507; from 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c before 37792091ab28ba030fd8d61184c47d4d51294170; from 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c before c1aad75595fb67edc7fda8af249d3b886efa1be9	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 3.18.1 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10; 3.18; and 7 more ranges	NVD

References

References

https://git.kernel.org/stable/c/5cc3300fab262b26c28bc2fc06df693410c3840b	patch
https://git.kernel.org/stable/c/0f11444271110d9b5bc6316a153c6431abda899c	patch
https://git.kernel.org/stable/c/d44872a569b8fbacde457ff2587a775e5004bb79	patch
https://git.kernel.org/stable/c/14aed0d4e58389cc6a88acf8610b12d3e476272b	patch
https://git.kernel.org/stable/c/6362c4a7d7e21e68cd9aa04df7cde16befba3a4b	patch
https://git.kernel.org/stable/c/9dd7489943324298bb0f385495795a82f1dd6507	patch
https://git.kernel.org/stable/c/37792091ab28ba030fd8d61184c47d4d51294170	patch
https://git.kernel.org/stable/c/c1aad75595fb67edc7fda8af249d3b886efa1be9	patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
https://cert-portal.siemens.com/productcert/html/ssa-457936.html

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.