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Unity Linux 20.1070a Security Update: kernel (UTSA-2026-146268)
high Nessus Plugin ID 372537
Synopsis
The Unity Linux host is missing one or more security updates.Description
The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-146268 advisory.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.
Tenable has extracted the preceding description block directly from the Unity Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected kernel package.See Also
https://nvd.nist.gov/vuln/detail/CVE-2026-68125
Plugin Details
Severity: High
ID: 372537
File Name: unity_linux_UTSA-2026-146268.nasl
Version: 1.1
Type: Local
Published: 10/27/2026
Updated: 10/27/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.9
Percentile: 99.36
CVSS v2
Risk Factor: High
Base Score: 8.3
Temporal Score: 6.1
Vector: CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-68125
CVSS v3
Risk Factor: High
Base Score: 8.8
Temporal Score: 7.7
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/UOS-Server/release, Host/UOS-Server/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 10/28/2026
Vulnerability Publication Date: 8/10/2026
Reference Information
CVE: CVE-2026-68125