CVE-2024-40991

Kernel memory corruption via unbalanced device-node release

Published Jul 12, 2024 · Updated Aug 5, 2026

Use-after-free in the TI K3 UDMA glue driver in Linux 6.9 allows local users to corrupt kernel memory during driver probing. The of_k3_udma_glue_parse_chn_by_id function calls of_node_put on its udmax_np argument without first acquiring a reference, prematurely releasing the device-tree node. Reachability is confined to TI K3 SoCs and the driver probe or channel-request path; subsequent node use can disclose or modify kernel memory or crash the host.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the TI K3 UDMA glue driver in Linux 6.9 allows local users to corrupt kernel memory during driver probing. The of_k3_udma_glue_parse_chn_by_id function calls of_node_put on its udmax_np argument without first acquiring a reference, prematurely releasing the device-tree node. Reachability is confined to TI K3 SoCs and the driver probe or channel-request path; subsequent node use can disclose or modify kernel memory or crash the host.

The record

CVE
CVE-2024-40991
Published
Jul 12, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 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=6.9
  2. Affected versionversion=81a1f90f20af71728f900f245aa69e9425fdef84 <a5ab5f413d1e4c7ed5f64271b025f0726374509e
  3. Affected versionversion=81a1f90f20af71728f900f245aa69e9425fdef84 <ba27e9d2207784da748b19170a2e56bd7770bd81

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=81a1f90f20af71728f900f245aa69e9425fdef84 <a5ab5f413d1e4c7ed5f64271b025f0726374509e; version=81a1f90f20af71728f900f245aa69e9425fdef84 <ba27e9d2207784da748b19170a2e56bd7770bd81

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux Kernel CNACVSS: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

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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