CVE-2024-44949

Kernel data corruption via undersized DMA alignment

Published Sep 4, 2024 · Updated Aug 5, 2026

Memory corruption in the Linux kernel on PA-RISC systems allows local users to corrupt DMA-written data through cache-line sharing. ARCH_DMA_MINALIGN is fixed at 16 bytes, allowing unrelated small allocations to occupy one cache line while DMA and cached writes target separate objects. Exploitation requires local low-privileged access on a PA-RISC system and concurrent writes; the bounded consequence is corruption of kernel-managed data.

CVSS severity7.8
High
EPSS probability0.23%
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 kernel on PA-RISC systems allows local users to corrupt DMA-written data through cache-line sharing. ARCH_DMA_MINALIGN is fixed at 16 bytes, allowing unrelated small allocations to occupy one cache line while DMA and cached writes target separate objects. Exploitation requires local low-privileged access on a PA-RISC system and concurrent writes; the bounded consequence is corruption of kernel-managed data.

The record

CVE
CVE-2024-44949
Published
Sep 4, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 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=4.4
  2. Affected versionversion=a01fece2e4185ac173abd16d10304d73d47ebf00 <00baca74fb5879e5f9034b6156671301f500f8ee
  3. Affected versionversion=a01fece2e4185ac173abd16d10304d73d47ebf00 <533de2f470baac40d3bf622fe631f15231a03c9f
  4. Affected versionversion=a01fece2e4185ac173abd16d10304d73d47ebf00 <642a0b7453daff0295310774016fcb56d1f5bc7f
  5. Affected versionversion=a01fece2e4185ac173abd16d10304d73d47ebf00 <7ae04ba36b381bffe2471eff3a93edced843240f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.4; version=a01fece2e4185ac173abd16d10304d73d47ebf00 <00baca74fb5879e5f9034b6156671301f500f8ee; version=a01fece2e4185ac173abd16d10304d73d47ebf00 <533de2f470baac40d3bf622fe631f15231a03c9f; version=a01fece2e4185ac173abd16d10304d73d47ebf00 <642a0b7453daff0295310774016fcb56d1f5bc7f; version=a01fece2e4185ac173abd16d10304d73d47ebf00 <7ae04ba36b381bffe2471eff3a93edced843240f

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

No sourced classifications are available.

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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