CVE-2026-93039

Kernel memory corruption via stale DAI link pointer

Published Sep 17, 2026 · Updated Sep 18, 2026

Memory corruption in affected Linux 4.19 and later kernels allows attackers to read or corrupt kernel memory during Meson ASoC probing. If the first DAI-link krealloc moves its allocation and the following private-data krealloc fails, meson_card_reallocate_links leaves card->dai_link pointing to freed memory; cleanup dereferences and frees it again. The path requires an Amlogic device tree with an AXG sound card and TDM playback link plus the two-step allocation outcome; no OS account or user interaction is required.

CVSS severity7.4
High
EPSS probability0.16%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in affected Linux 4.19 and later kernels allows attackers to read or corrupt kernel memory during Meson ASoC probing. If the first DAI-link krealloc moves its allocation and the following private-data krealloc fails, meson_card_reallocate_links leaves card->dai_link pointing to freed memory; cleanup dereferences and frees it again. The path requires an Amlogic device tree with an AXG sound card and TDM playback link plus the two-step allocation outcome; no OS account or user interaction is required.

The record

CVE
CVE-2026-93039
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=4.19
  2. Affected versionversion=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <0b30fbe6bf7cf6499b19dd886f466e7c9e820089
  3. Affected versionversion=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642
  4. Affected versionversion=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <2aaa41cf974f83a6fb105422bac4e2f107150774
  5. Affected versionversion=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab
  6. Affected versionversion=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe
  7. Affected versionversion=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <8db0a0fc84e80aa9924e0833aef6cc95df94e5a7
  8. Affected versionversion=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d
  9. Affected versionversion=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <de33afc57f24538186bccf4c4f6c65dd38634fd8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <0b30fbe6bf7cf6499b19dd886f466e7c9e820089; version=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642; version=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <2aaa41cf974f83a6fb105422bac4e2f107150774; version=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab; version=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe; version=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <8db0a0fc84e80aa9924e0833aef6cc95df94e5a7; version=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d; version=7864a79f37b55769b817d5e6c5ae0ca4bfdba93b <de33afc57f24538186bccf4c4f6c65dd38634fd8

Published CVSS scores

7.4Linux CNACVSS:3.1/AV:L/AC:H/PR:N/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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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