CVE-2023-53257

Kernel crash via truncated S1G action frame

Published Sep 15, 2025 · Updated Sep 15, 2025

Out-of-bounds read in mac80211 in affected Linux kernels allows physically proximate attackers to crash the kernel via a truncated S1G action frame. ieee80211_rx_h_action() reads s1g.action_code after checking only the minimum action-frame size, so a category-only frame lacks the byte consumed by the switch. The attacker must reach the victim's Wi-Fi radio; the bounded read can expose one adjacent byte or trigger a kernel oops or panic, with no write primitive reported.

CVSS severity7.1
High
EPSS probability0.21%
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 read in mac80211 in affected Linux kernels allows physically proximate attackers to crash the kernel via a truncated S1G action frame. ieee80211_rx_h_action() reads s1g.action_code after checking only the minimum action-frame size, so a category-only frame lacks the byte consumed by the switch. The attacker must reach the victim's Wi-Fi radio; the bounded read can expose one adjacent byte or trigger a kernel oops or panic, with no write primitive reported.

The record

CVE
CVE-2023-53257
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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 <19e4a47ee74718a22e963e8a647c8c3bfe8bb05c
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5e030a2509be72b452b6f4a800786d43229414db
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7ae7a1378a119780c8c17a6b5fc03011c3bb7029
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fedd9377dd9c71a950d432fbe1628eebfbed70a1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <19e4a47ee74718a22e963e8a647c8c3bfe8bb05c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5e030a2509be72b452b6f4a800786d43229414db; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7ae7a1378a119780c8c17a6b5fc03011c3bb7029; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fedd9377dd9c71a950d432fbe1628eebfbed70a1

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.1LinuxCVSS: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

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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

T1499Endpoint Denial of Service

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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