What’s Vulnerable › Vulnerabilities

CVE-2026-43030: bpf: Fix regsafe() for pointers to packet

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-01 · updated 2026-10-19
• Weakness: CWE-682

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 products

• Linux kernel: from 5.10.155 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.134; from 6.7 before 6.12.81; from 6.13 before 6.18.22 — fixed in 5.10.253, 5.15.203, 6.1.168, 6.12.81, 6.18.22, 6.19.12

How to fix

Upgrade to a fixed version: Linux kernel 5.10.253, 5.15.203, 6.1.168, 6.12.81. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/015a74476dc1ab6923d89f1ee009aaf43faa7185
• https://git.kernel.org/stable/c/37db6b9726d0bcf91cbdf9d63b558c50da49f968
• https://git.kernel.org/stable/c/7241da033fdc507b920e092dab1f97b945cb0370
• https://git.kernel.org/stable/c/8aebe18069394f4a79d2d82080a0f806da449996
• https://git.kernel.org/stable/c/a8502a79e832b861e99218cbd2d8f4312d62e225
• https://git.kernel.org/stable/c/b52f6d0ef7b308f9d05bbddb78749852f28e8e40
• https://git.kernel.org/stable/c/b99d82706bd1511bb875e3de7154698fd9215c99
• https://git.kernel.org/stable/c/ca995b1462ec6db1e869100ba1fb7356bd3f22f0
• https://cert-portal.siemens.com/productcert/html/ssa-019113.html
• https://cert-portal.siemens.com/productcert/html/ssa-082556.html
• https://cert-portal.siemens.com/productcert/html/ssa-457936.html

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