CVE-2026-43030

bpf: Fix regsafe() for pointers to packet

HIGH
7.8
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
HIGH7.8
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix regsafe() for pointers to packet In case rold->reg->range == BEYOND_PKT_END && rcur->reg->range == N regsafe() may return true which may lead to current state with valid packet range not being explored. Fix the bug.

Affected

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

5.10.155 ≤ 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 < 6.12.815.10.1556d94e741a8ff818e5518da8257f5ca0aaed1f2697.07.0 rc17.0 rc27.0 rc37.0 rc47.0 rc57.0 rc695b6ec733752b31bfd166c4609d2c1b5cdde9b47
Vendor states this is fixed in 015a74476dc1ab6923d89f1ee009aaf43faa7185 (fixed)
Vendor states this is fixed in 37db6b9726d0bcf91cbdf9d63b558c50da49f968 (fixed)
Vendor states this is fixed in 7241da033fdc507b920e092dab1f97b945cb0370 (fixed)
Vendor states this is fixed in 8aebe18069394f4a79d2d82080a0f806da449996 (fixed)
Vendor states this is fixed in a8502a79e832b861e99218cbd2d8f4312d62e225 (fixed)
Vendor states this is fixed in b52f6d0ef7b308f9d05bbddb78749852f28e8e40 (fixed)
Vendor states this is fixed in b99d82706bd1511bb875e3de7154698fd9215c99 (fixed)
Vendor states this is fixed in ca995b1462ec6db1e869100ba1fb7356bd3f22f0 (fixed)
Vendor states this is fixed in 5.10.253 (unaffected)
Vendor states this is fixed in 5.11 (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 automatableTotal impact

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

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-682

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