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Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: kernel (UTSA-2025-410269)

medium Nessus Plugin ID 267730

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-2025-410269 advisory.

 In the Linux kernel, the following vulnerability has been resolved:

 net: add more sanity checks to qdisc_pkt_len_init()

 One path takes care of SKB_GSO_DODGY, assuming skb->len is bigger than hdr_len.

 virtio_net_hdr_to_skb() does not fully dissect TCP headers, it only make sure it is at least 20 bytes.

 It is possible for an user to provide a malicious 'GSO' packet, total length of 80 bytes.

 - 20 bytes of IPv4 header
 - 60 bytes TCP header
 - a small gso_size like 8

 virtio_net_hdr_to_skb() would declare this packet as a normal GSO packet, because it would see 40 bytes of payload, bigger than gso_size.

 We need to make detect this case to not underflow qdisc_skb_cb(skb)->pkt_len.

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

http://www.nessus.org/u?d14d77e4

https://nvd.nist.gov/vuln/detail/CVE-2024-49948

Plugin Details

Severity: Medium

ID: 267730

File Name: unity_linux_UTSA-2025-410269.nasl

Version: 1.2

Type: local

Published: 10/7/2025

Updated: 10/15/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2024-49948

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: 7/8/2025

Vulnerability Publication Date: 12/12/2023

Reference Information

CVE: CVE-2024-49948