CVE-2026-43078Public exploit

Kernel memory corruption via zero-length page reassignment

Published May 6, 2026 · Updated May 6, 2026

Out-of-bounds access in Linux Kernel allows local users to corrupt kernel memory through AF_ALG crypto socket operations. The af_alg_pull_tsgl loop calls sg_set_page on dst after the requested length reaches zero because reassignment checks dst but not plen. Low-privilege local access is required; the public syzbot reproducer demonstrates a KASAN slab out-of-bounds read, but privilege escalation has not been demonstrated.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Linux Kernel allows local users to corrupt kernel memory through AF_ALG crypto socket operations. The af_alg_pull_tsgl loop calls sg_set_page on dst after the requested length reaches zero because reassignment checks dst but not plen. Low-privilege local access is required; the public syzbot reproducer demonstrates a KASAN slab out-of-bounds read, but privilege escalation has not been demonstrated.

The record

CVE
CVE-2026-43078
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=4.14
  2. Affected versionversion=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <2b781d1d4f933990318bcc5c68fb75a717379e42
  3. Affected versionversion=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <31d00156e50ecad37f2cb6cbf04aaa9a260505ef
  4. Affected versionversion=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <710a4ce5d7afd9fe082c75dec282ab4a11c0fe71
  5. Affected versionversion=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <9532501e0f1b200ea80baa0e33e0b06da10bb271
  6. Affected versionversion=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <c8369a6d62f5abde9cbd4b62c45bf4b996be2468
  7. Affected versionversion=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <dea5fcf085f977b6c2de1b2d4ec4767b6c840d1f
  8. Affected versionversion=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <f7826bc0b39928a4a22f6b815dd9940b22a63503
  9. Affected versionversion=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <fa48d3ea9cdbfb28c1fd6756c6c5cd01351aa51e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.14; version=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <2b781d1d4f933990318bcc5c68fb75a717379e42; version=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <31d00156e50ecad37f2cb6cbf04aaa9a260505ef; version=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <710a4ce5d7afd9fe082c75dec282ab4a11c0fe71; version=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <9532501e0f1b200ea80baa0e33e0b06da10bb271; version=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <c8369a6d62f5abde9cbd4b62c45bf4b996be2468; version=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <dea5fcf085f977b6c2de1b2d4ec4767b6c840d1f; version=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <f7826bc0b39928a4a22f6b815dd9940b22a63503; version=e870456d8e7c8d57c059ea479b5aadbb55ff4c3a <fa48d3ea9cdbfb28c1fd6756c6c5cd01351aa51e

Published CVSS scores

7.3OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Amazon LinuxCVSS: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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

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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