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8.8
HIGH CVSS 3.1
CVE-2026-68125
mac802154: llsec: reject frames shorter than the authentication tag
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: mac802154: llsec: reject frames shorter than the authentication tag llsec_do_decrypt_auth() computes the associated-data length for the AEAD request as assoclen += datalen - authlen; where datalen is the number of bytes after the MAC header and authlen (4, 8 or 16) is the length of the authentication tag. Nothing verifies that the frame actually carries at least authlen payload bytes. A secured frame whose payload is shorter than the tag makes datalen - authlen negative; assoclen is then passed to aead_request_set_ad() as an unsigned value close to 4 GiB, so crypto_aead_decrypt() walks far off the end of the scatterlist that only spans the real frame. The frame is fully attacker-controlled and reaches this path from any IEEE 802.15.4 peer in radio range. Reject frames whose payload is shorter than the authentication tag before the subtraction. Dynamically reproduced on a KASAN kernel as a general-protection-fault in the AEAD scatterwalk, and the fix confirmed.

Details
INFO

Published Date :

Aug. 10, 2026, 1:19 p.m.

Last Modified :

Aug. 17, 2026, 5:18 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-68125 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Reject frames shorter than the authentication tag to prevent out-of-bounds memory access.
  • Update the Linux kernel to the latest stable version.
  • Apply the security patch for the llsec module.
  • Ensure frames have sufficient payload length.
  • Validate frame length before processing.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-68125.

URL Resource
https://git.kernel.org/stable/c/5bbf0cd9b6a7076af86c75e87e180099be2e11ae
https://git.kernel.org/stable/c/de80808f37d99c6dc67bb6f97eea00c8f57a8821
https://git.kernel.org/stable/c/e09e0301d616c1ef38a5e64e8e4326fd39df13cc
https://git.kernel.org/stable/c/f20dedce0429b293d4bad604e0d3f65d8ac96c83
https://git.kernel.org/stable/c/fd3a3f28ed60c6af4b2a39933b151d6b27842c3b
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-68125 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-68125 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-68125 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-68125 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': '5bbf0cd9b6a7076af86c75e87e180099be2e11ae', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'de80808f37d99c6dc67bb6f97eea00c8f57a8821', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'f20dedce0429b293d4bad604e0d3f65d8ac96c83', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'e09e0301d616c1ef38a5e64e8e4326fd39df13cc', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'fd3a3f28ed60c6af4b2a39933b151d6b27842c3b', 'versionType': 'git'}], 'programFiles': ['net/mac802154/llsec.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/mac802154/llsec.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': '5bbf0cd9b6a7076af86c75e87e180099be2e11ae', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'de80808f37d99c6dc67bb6f97eea00c8f57a8821', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'f20dedce0429b293d4bad604e0d3f65d8ac96c83', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'e09e0301d616c1ef38a5e64e8e4326fd39df13cc', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'fd3a3f28ed60c6af4b2a39933b151d6b27842c3b', 'versionType': 'git'}], 'programFiles': ['net/mac802154/llsec.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/mac802154/llsec.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 13, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 10, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': '5bbf0cd9b6a7076af86c75e87e180099be2e11ae', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'de80808f37d99c6dc67bb6f97eea00c8f57a8821', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'f20dedce0429b293d4bad604e0d3f65d8ac96c83', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'e09e0301d616c1ef38a5e64e8e4326fd39df13cc', 'versionType': 'git'}, {'status': 'affected', 'version': '4c14a2fb5d143e4ed94143be2b8c1961b47df9af', 'lessThan': 'fd3a3f28ed60c6af4b2a39933b151d6b27842c3b', 'versionType': 'git'}], 'programFiles': ['net/mac802154/llsec.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.16'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.16', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.42', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.6', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc5', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/mac802154/llsec.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: mac802154: llsec: reject frames shorter than the authentication tag llsec_do_decrypt_auth() computes the associated-data length for the AEAD request as assoclen += datalen - authlen; where datalen is the number of bytes after the MAC header and authlen (4, 8 or 16) is the length of the authentication tag. Nothing verifies that the frame actually carries at least authlen payload bytes. A secured frame whose payload is shorter than the tag makes datalen - authlen negative; assoclen is then passed to aead_request_set_ad() as an unsigned value close to 4 GiB, so crypto_aead_decrypt() walks far off the end of the scatterlist that only spans the real frame. The frame is fully attacker-controlled and reaches this path from any IEEE 802.15.4 peer in radio range. Reject frames whose payload is shorter than the authentication tag before the subtraction. Dynamically reproduced on a KASAN kernel as a general-protection-fault in the AEAD scatterwalk, and the fix confirmed.
    Added Reference https://git.kernel.org/stable/c/5bbf0cd9b6a7076af86c75e87e180099be2e11ae
    Added Reference https://git.kernel.org/stable/c/de80808f37d99c6dc67bb6f97eea00c8f57a8821
    Added Reference https://git.kernel.org/stable/c/e09e0301d616c1ef38a5e64e8e4326fd39df13cc
    Added Reference https://git.kernel.org/stable/c/f20dedce0429b293d4bad604e0d3f65d8ac96c83
    Added Reference https://git.kernel.org/stable/c/fd3a3f28ed60c6af4b2a39933b151d6b27842c3b
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 8.8
Attack Vector
Attack Complexity
Privileges Required
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Scope
Confidentiality Impact
Integrity Impact
Availability Impact