CVE-2026-43030

Kernel compromise via incorrect packet-pointer state pruning

Published May 1, 2026 · Updated May 1, 2026

Incorrect state pruning in the Linux Kernel BPF verifier allows local users to compromise the kernel through a crafted BPF program. The regsafe() comparison wrongly treats a prior BEYOND_PKT_END packet-pointer range as safe for a current finite range, preventing exploration of the valid current state. Low local privileges and permission to submit the relevant BPF program are required; the public record does not disclose the resulting post-verification primitive.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect state pruning in the Linux Kernel BPF verifier allows local users to compromise the kernel through a crafted BPF program. The regsafe() comparison wrongly treats a prior BEYOND_PKT_END packet-pointer range as safe for a current finite range, preventing exploration of the valid current state. Low local privileges and permission to submit the relevant BPF program are required; the public record does not disclose the resulting post-verification primitive.

The record

CVE
CVE-2026-43030
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.11
  2. Affected versionversion=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <015a74476dc1ab6923d89f1ee009aaf43faa7185
  3. Affected versionversion=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <37db6b9726d0bcf91cbdf9d63b558c50da49f968
  4. Affected versionversion=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <7241da033fdc507b920e092dab1f97b945cb0370
  5. Affected versionversion=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <8aebe18069394f4a79d2d82080a0f806da449996
  6. Affected versionversion=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <a8502a79e832b861e99218cbd2d8f4312d62e225
  7. Affected versionversion=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <b99d82706bd1511bb875e3de7154698fd9215c99
  8. Affected versionversion=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <ca995b1462ec6db1e869100ba1fb7356bd3f22f0
  9. Affected versionversion=95b6ec733752b31bfd166c4609d2c1b5cdde9b47 <b52f6d0ef7b308f9d05bbddb78749852f28e8e40

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.11; version=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <015a74476dc1ab6923d89f1ee009aaf43faa7185; version=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <37db6b9726d0bcf91cbdf9d63b558c50da49f968; version=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <7241da033fdc507b920e092dab1f97b945cb0370; version=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <8aebe18069394f4a79d2d82080a0f806da449996; version=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <a8502a79e832b861e99218cbd2d8f4312d62e225; version=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <b99d82706bd1511bb875e3de7154698fd9215c99; version=6d94e741a8ff818e5518da8257f5ca0aaed1f269 <ca995b1462ec6db1e869100ba1fb7356bd3f22f0; version=95b6ec733752b31bfd166c4609d2c1b5cdde9b47 <b52f6d0ef7b308f9d05bbddb78749852f28e8e40

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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