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Unity Linux 20.1050a Security Update: kernel (UTSA-2026-100541)
medium Nessus Plugin ID 336775
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-2026-100541 advisory.In the Linux kernel, the following vulnerability has been resolved:
e1000/e1000e: Fix leak in DMA error cleanup
If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb.
Because count is incremented after a successful mapping, it will always match the correct number of unmappings needed when dma_error is reached.
Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping would leak.
In these commits, a faulty while condition caused an infinite loop in dma_error:
Commit 03b1320dfcee (e1000e: remove use of skb_dma_map from e1000e driver) Commit 602c0554d7b0 (e1000: remove use of skb_dma_map from e1000 driver)
Commit c1fa347f20f1 (e1000/e1000e/igb/igbvf/ixgb/ixgbe: Fix tests of unsigned in *_tx_map()) fixed the infinite loop, but introduced the off-by-one error.
This issue may still exist in the igbvf driver, but I did not address it in this patch.
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-2026-43445
Plugin Details
Severity: Medium
ID: 336775
File Name: unity_linux_UTSA-2026-100541.nasl
Version: 1.1
Type: Local
Published: 8/17/2026
Updated: 8/17/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5
Percentile: 93.84
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-2026-43445
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: 8/13/2026
Vulnerability Publication Date: 5/8/2026
Reference Information
CVE: CVE-2026-43445