CVE-2023-53040

Service interruption via unchecked negative header length

Published May 2, 2025 · Updated May 11, 2026

Out-of-bounds access in the Linux kernel ca8210 driver allows local users to interrupt service during IEEE 802.15.4 packet transmission. When ieee802154_hdr_peek_addrs fails, ca8210_skb_tx retains its negative return value in mac_len and continues to access skb data outside its valid bounds. Reachability requires the ca8210 transmit path and a packet buffer whose header parsing fails; published sources do not specify whether interruption ends in a crash or hang.

CVSS severity5.5
Medium
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 access in the Linux kernel ca8210 driver allows local users to interrupt service during IEEE 802.15.4 packet transmission. When ieee802154_hdr_peek_addrs fails, ca8210_skb_tx retains its negative return value in mac_len and continues to access skb data outside its valid bounds. Reachability requires the ca8210 transmit path and a packet buffer whose header parsing fails; published sources do not specify whether interruption ends in a crash or hang.

The record

CVE
CVE-2023-53040
Published
May 2, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.12
  2. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <55d836f75778d2e2cafe37e023f9c106400bad4b
  3. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <5da4469a7aa011de614c3e2ae383c35a353a382e
  4. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <6c993779ea1d0cccdb3a5d7d45446dd229e610a3
  5. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <7df72bedbdd1d02bb216e1f6eca0a16900238c4e
  6. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <918944526a386f186dd818ea6b0bcbed75d8c16b
  7. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <d143e327c97241599c958d1ba9fbaa88c37db721
  8. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <d2b3bd0d4cadfdb7f3454d2aef9d5d9e8b48aae4
  9. Affected versionversion=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <fd176a18db96d574d8c4763708abcec4444a08b6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <55d836f75778d2e2cafe37e023f9c106400bad4b; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <5da4469a7aa011de614c3e2ae383c35a353a382e; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <6c993779ea1d0cccdb3a5d7d45446dd229e610a3; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <7df72bedbdd1d02bb216e1f6eca0a16900238c4e; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <918944526a386f186dd818ea6b0bcbed75d8c16b; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <d143e327c97241599c958d1ba9fbaa88c37db721; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <d2b3bd0d4cadfdb7f3454d2aef9d5d9e8b48aae4; version=ded845a781a578dfb0b5b2c138e5a067aa3b1242 <fd176a18db96d574d8c4763708abcec4444a08b6

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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