CVE-2026-74488

Adjacent kernel memory corruption via subframe length mismatch

Published Aug 15, 2026 · Updated Aug 15, 2026

Memory corruption in Linux 4.5 and later allows physically proximate attackers to corrupt kernel memory via crafted TDLS frames. mwifiex_11n_dispatch_amsdu_pkt passes a subframe pointer with the parent skb length, causing a use-after-free or an oversized element walk beyond the subframe. TDLS-capable mwifiex firmware and a TDLS-ethertype subframe are required; the overrun can disclose or corrupt kernel memory or panic the host.

CVSS severity8.8
High
EPSS probability0.26%
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 Linux 4.5 and later allows physically proximate attackers to corrupt kernel memory via crafted TDLS frames. mwifiex_11n_dispatch_amsdu_pkt passes a subframe pointer with the parent skb length, causing a use-after-free or an oversized element walk beyond the subframe. TDLS-capable mwifiex firmware and a TDLS-ethertype subframe are required; the overrun can disclose or corrupt kernel memory or panic the host.

The record

CVE
CVE-2026-74488
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1203
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=4.5
  2. Affected versionversion=776f742040ca5eb6242c60f29ac73d5752a5b621 <25e5a3fe4f15e30f74eca42cbf3bcc3a3fbeda79
  3. Affected versionversion=776f742040ca5eb6242c60f29ac73d5752a5b621 <5a21ab03829cb6d2682c127f22e2b9cd63b4393f
  4. Affected versionversion=776f742040ca5eb6242c60f29ac73d5752a5b621 <99a948382af8a225e2d5e54a7052158cd6281cc6
  5. Affected versionversion=776f742040ca5eb6242c60f29ac73d5752a5b621 <c9dcfe6b8b71369e1d732e2ff622c3696a2f032c
  6. Affected versionversion=776f742040ca5eb6242c60f29ac73d5752a5b621 <ece2ebb34247d573142617dfc534a9dc11ba59be

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.5; version=776f742040ca5eb6242c60f29ac73d5752a5b621 <25e5a3fe4f15e30f74eca42cbf3bcc3a3fbeda79; version=776f742040ca5eb6242c60f29ac73d5752a5b621 <5a21ab03829cb6d2682c127f22e2b9cd63b4393f; version=776f742040ca5eb6242c60f29ac73d5752a5b621 <99a948382af8a225e2d5e54a7052158cd6281cc6; version=776f742040ca5eb6242c60f29ac73d5752a5b621 <c9dcfe6b8b71369e1d732e2ff622c3696a2f032c; version=776f742040ca5eb6242c60f29ac73d5752a5b621 <ece2ebb34247d573142617dfc534a9dc11ba59be

Published CVSS scores

8.8LinuxCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.1Amazon LinuxCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/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.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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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