CVE-2024-49853

Kernel memory corruption via shared channel double-free

Published Oct 21, 2024 · Updated May 11, 2026

Double free in the Arm SCMI OP-TEE transport in Linux allows local users to trigger kernel memory corruption during stack unloading. scmi_optee_chan_free retrieves a channel pointer from each protocol's descriptor and frees it without checking whether another protocol already freed the shared object. Reachability requires the Arm SCMI OP-TEE transport with a channel shared across protocols; the double free can compromise kernel confidentiality, integrity, and availability.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double free in the Arm SCMI OP-TEE transport in Linux allows local users to trigger kernel memory corruption during stack unloading. scmi_optee_chan_free retrieves a channel pointer from each protocol's descriptor and frees it without checking whether another protocol already freed the shared object. Reachability requires the Arm SCMI OP-TEE transport with a channel shared across protocols; the double free can compromise kernel confidentiality, integrity, and availability.

The record

CVE
CVE-2024-49853
Published
Oct 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.18
  2. Affected versionversion=5f90f189a052f6fc46048f6ce29a37b709548b81 <6699567b0bbb378600a4dc0a1f929439a4e84a2c
  3. Affected versionversion=5f90f189a052f6fc46048f6ce29a37b709548b81 <aef6ae124bb3cc12e34430fed91fbb7efd7a444d
  4. Affected versionversion=5f90f189a052f6fc46048f6ce29a37b709548b81 <d7f4fc2bc101e666da649605a9ece2bd42529c7a
  5. Affected versionversion=5f90f189a052f6fc46048f6ce29a37b709548b81 <dc9543a4f2a5498a4a12d6d2427492a6f1a28056
  6. Affected versionversion=5f90f189a052f6fc46048f6ce29a37b709548b81 <e98dba934b2fc587eafb83f47ad64d9053b18ae0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.18; version=5f90f189a052f6fc46048f6ce29a37b709548b81 <6699567b0bbb378600a4dc0a1f929439a4e84a2c; version=5f90f189a052f6fc46048f6ce29a37b709548b81 <aef6ae124bb3cc12e34430fed91fbb7efd7a444d; version=5f90f189a052f6fc46048f6ce29a37b709548b81 <d7f4fc2bc101e666da649605a9ece2bd42529c7a; version=5f90f189a052f6fc46048f6ce29a37b709548b81 <dc9543a4f2a5498a4a12d6d2427492a6f1a28056; version=5f90f189a052f6fc46048f6ce29a37b709548b81 <e98dba934b2fc587eafb83f47ad64d9053b18ae0

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.5SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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-415Double Free

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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