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Unity Linux 20.1020e / 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-142510)
high Nessus Plugin ID 370591
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-2026-142510 advisory.In the Linux kernel, the following vulnerability has been resolved:
xfrm: ah6: validate routing header segments_left
AH6 rearranges routing-header addresses before computing or verifying the ICV. ipv6_rearrange_rthdr() assumes that segments_left is not larger than the number of addresses described by the routing header's hdrlen field.
That assumption does not hold for raw IPv6 HDRINCL packets. A packet with hdrlen equal to 2 describes one address, but can carry an arbitrary segments_left value. With segments_left equal to 255, the function moves its address pointer 4,064 bytes backwards and passes a 4,064-byte length to memmove(), resulting in an out-of-bounds access.
Validate the invariant locally before modifying the routing header or performing any address-pointer arithmetic, and propagate malformed-header errors to the existing AH6 input and output error paths.
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://atomgit.com/src-openeuler/kernel/issues/18687
https://nvd.nist.gov/vuln/detail/CVE-2026-80844
Plugin Details
Severity: High
ID: 370591
File Name: unity_linux_UTSA-2026-142510.nasl
Version: 1.1
Type: Local
Published: 10/22/2026
Updated: 10/22/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.5
Percentile: 98.19
CVSS v2
Risk Factor: High
Base Score: 8.7
Temporal Score: 6.8
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:P/A:C
CVSS Score Source: CVE-2026-80844
CVSS v3
Risk Factor: High
Base Score: 8.3
Temporal Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
Temporal Vector: CVSS:3.0/E:P/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 Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 10/22/2026
Vulnerability Publication Date: 9/4/2026
Reference Information
CVE: CVE-2026-80844