CVE-2026-43113

Kernel memory corruption via unchecked completion ID

Published May 6, 2026 · Updated May 6, 2026

Out-of-bounds access in the Linux Kernel wl1251 Wi-Fi driver allows physically proximate attackers to corrupt kernel memory. The wl1251_tx_packet_cb() callback uses a raw u8 completion ID from firmware to index the fixed 16-entry wl->tx_frames[] array without validating the index before dereferencing it. Reachability requires an affected wl1251 driver and attacker influence over firmware transmit-completion records; no credentials or user interaction are required, and exploitation can crash the system or corrupt kernel data.

CVSS severity8.8
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

Out-of-bounds access in the Linux Kernel wl1251 Wi-Fi driver allows physically proximate attackers to corrupt kernel memory. The wl1251_tx_packet_cb() callback uses a raw u8 completion ID from firmware to index the fixed 16-entry wl->tx_frames[] array without validating the index before dereferencing it. Reachability requires an affected wl1251 driver and attacker influence over firmware transmit-completion records; no credentials or user interaction are required, and exploitation can crash the system or corrupt kernel data.

The record

CVE
CVE-2026-43113
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0fd56fad9c56356e7fa7a7c52e7ecbf807a44eb0
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <26ee518695c484f75e3606d631278e84bd24ae02
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8d7465be5163a923ee5d7459719ef5a021c1584a
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b6ba1eacf276063ebeefbbae8056043c24f2efaf
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <df15adc692a802636dd3f258fc7cca8bf7a0ed9a

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0fd56fad9c56356e7fa7a7c52e7ecbf807a44eb0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <26ee518695c484f75e3606d631278e84bd24ae02; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8d7465be5163a923ee5d7459719ef5a021c1584a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b6ba1eacf276063ebeefbbae8056043c24f2efaf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <df15adc692a802636dd3f258fc7cca8bf7a0ed9a

Published CVSS scores

8.8Linux kernel CNACVSS:3.1/AV:A/AC:L/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.

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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