CVE-2026-43028

netfilter: x_tables: ensure names are nul-terminated

HIGH
7.1
CVSS Score
Published: May 1, 2026 at 02:15 PM UTC
Updated: October 19, 2026 at 08:18 PM UTC
4 products affected across 2 vendorsLinux KernelSIMATIC S7-1500 CPU 1518-4 Pn /dp MFP FirmwareSiplus S7-1500 CPU 1518-4 Pn /dp MFP Firmware

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Severity
HIGH7.1
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: ensure names are nul-terminated Reject names that lack a \0 character before feeding them to functions that expect c-strings. Fixes tag is the most recent commit that needs this change.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.5 ≤ v < 5.10.2535.11 ≤ v < 5.15.2035.16 ≤ v < 6.1.1686.13 ≤ v < 6.18.226.19 ≤ v < 6.19.126.2 ≤ v < 6.6.1346.7 ≤ v < 6.12.817.07.0 rc17.0 rc27.0 rc37.0 rc47.0 rc57.0 rc6c38c4597e4bf3e99860eac98211748e1ecb0e139
Vendor states this is fixed in 673bbd36cba21d10a10f0932f479df7468e26fbb (fixed)
Vendor states this is fixed in 73124608172890306b85f2206d8b3cac20e324f1 (fixed)
Vendor states this is fixed in a958a4f90ddd7de0800b33ca9d7b886b7d40f74e (fixed)
Vendor states this is fixed in aa6cd4a8863391e0a64f62d8922cb0af732a2cf2 (fixed)
Vendor states this is fixed in bcac50ea0a29d430eedc5ac87b215393b567baa9 (fixed)
Vendor states this is fixed in c2d4a3abb15ca14716c6d8b9ffcbcd7c63626af4 (fixed)
Vendor states this is fixed in ea01c1b219f5a11c66918abaa6f052e5a74041d6 (fixed)
Vendor states this is fixed in f419bdc205894750f4d3ec042bc87a1b9cde1351 (fixed)
Vendor states this is fixed in 4.5 (unaffected)
Vendor states this is fixed in 5.10.253 (unaffected)
Vendor states this is fixed in 5.15.203 (unaffected)
Vendor states this is fixed in 6.1.168 (unaffected)
Vendor states this is fixed in 6.12.81 (unaffected)
Vendor states this is fixed in 6.18.22 (unaffected)
Vendor states this is fixed in 6.19.12 (unaffected)
Vendor states this is fixed in 6.6.134 (unaffected)
Vendor states this is fixed in 7.0 (unaffected)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-170

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