CVE-2024-26706

Kernel-state corruption via hard-coded error register

Published Apr 3, 2024 · Updated Aug 5, 2026

Memory corruption in the Linux PA-RISC exception handler allows local users to corrupt kernel state during failed user-memory access. When the compiler assigns the error result outside r29, the fault handler still writes -EFAULT to r29, overwriting the register's live value. Reachability requires a PA-RISC kernel built with the affected exception-table code; corruption can alter kernel state and interrupt service.

CVSS severity7.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the Linux PA-RISC exception handler allows local users to corrupt kernel state during failed user-memory access. When the compiler assigns the error result outside r29, the fault handler still writes -EFAULT to r29, overwriting the register's live value. Reachability requires a PA-RISC kernel built with the affected exception-table code; corruption can alter kernel state and interrupt service.

The record

CVE
CVE-2024-26706
Published
Apr 3, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=09b931fcb87c8aad178475a7db1d4bfc939f7faa
  2. Affected versionversion=37e6234297379e0db25e39c2ca99776fea70026c
  3. Affected versionversion=4.10.9 <4.11
  4. Affected versionversion=4.11
  5. Affected versionversion=4.9.21 <4.10
  6. Affected versionversion=d19f5e41b344a057bb2450024a807476f30978d2 <23027309b099ffc4efca5477009a11dccbdae592
  7. Affected versionversion=d19f5e41b344a057bb2450024a807476f30978d2 <8b1d72395635af45410b66cc4c4ab37a12c4a831
  8. Affected versionversion=d19f5e41b344a057bb2450024a807476f30978d2 <ce31d79aa1f13a2345791f84935281a2c194e003
  9. Affected versionversion=d19f5e41b344a057bb2450024a807476f30978d2 <fa69a8063f8b27f3c7434a0d4f464a76a62f24d2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=09b931fcb87c8aad178475a7db1d4bfc939f7faa; version=37e6234297379e0db25e39c2ca99776fea70026c; version=4.10.9 <4.11; version=4.11; version=4.9.21 <4.10; version=d19f5e41b344a057bb2450024a807476f30978d2 <23027309b099ffc4efca5477009a11dccbdae592; version=d19f5e41b344a057bb2450024a807476f30978d2 <8b1d72395635af45410b66cc4c4ab37a12c4a831; version=d19f5e41b344a057bb2450024a807476f30978d2 <ce31d79aa1f13a2345791f84935281a2c194e003; version=d19f5e41b344a057bb2450024a807476f30978d2 <fa69a8063f8b27f3c7434a0d4f464a76a62f24d2

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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