CVE-2024-46852

Kernel memory corruption via CMA heap off-by-one

Published Sep 27, 2024 · Updated Aug 5, 2026

Out-of-bounds access in the Linux kernel CMA dma-buf heap allows local users to map an arbitrary page through an oversized mapping. The CMA heap fault handler accepts an offset equal to the buffer page count, reads past the pages array, and inserts the resulting page into the mapping. A local user must first enlarge a CMA dma-buf mapping with mremap; the arbitrary page mapping can disclose or alter memory or interrupt service.

CVSS severity7.8
High
EPSS probability0.21%
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 the Linux kernel CMA dma-buf heap allows local users to map an arbitrary page through an oversized mapping. The CMA heap fault handler accepts an offset equal to the buffer page count, reads past the pages array, and inserts the resulting page into the mapping. A local user must first enlarge a CMA dma-buf mapping with mremap; the arbitrary page mapping can disclose or alter memory or interrupt service.

The record

CVE
CVE-2024-46852
Published
Sep 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-193, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 27, 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

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=a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 <79cce5e81d20fa9ad553be439d665ac3302d3c95
  3. Affected versionversion=a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 <84175dc5b2c932266a50c04e5ce342c30f817a2f
  4. Affected versionversion=a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 <e79050882b857c37634baedbdcf7c2047c24cbff
  5. Affected versionversion=a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 <ea5ff5d351b520524019f7ff7f9ce418de2dad87
  6. Affected versionversion=a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 <eb7fc8b65cea22f9038c52398c8b22849e9620ea

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 <79cce5e81d20fa9ad553be439d665ac3302d3c95; version=a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 <84175dc5b2c932266a50c04e5ce342c30f817a2f; version=a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 <e79050882b857c37634baedbdcf7c2047c24cbff; version=a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 <ea5ff5d351b520524019f7ff7f9ce418de2dad87; version=a5d2d29e24be8967ef78a1b1fb2292413e3b3df9 <eb7fc8b65cea22f9038c52398c8b22849e9620ea

Published CVSS scores

7.8NIST NVDCVSS: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 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-193Off-by-one Error
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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