A vulnerability has been found in osrg GoBGP up to 4.3.0. This impacts the function SRv6L3ServiceAttribute.DecodeFromBytes of the file pkg/packet/bgp/prefix_sid.go of the component SRv6 L3 Service. Such manipulation of the argument data leads to denial of service. The attack may be performed from remote. Upgrading to version 4.4.0 will fix this issue. The name of the patch is f9f7b55ec258e514be0264871fa645a2c3edad11. You should upgrade the affected component.

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8348-1 advisory.

    It was discovered that GoBGP incorrectly handled certain specially crafted BGP UPDATE messages. A remote     attacker could possibly use this issue to cause GoBGP to crash, resulting in a denial of service.
    (CVE-2026-37461)

    Yanlei Wang discovered that GoBGP incorrectly handled certain malformed BGP UPDATE messages containing     4-byte AS attributes. A remote attacker could possibly use this issue to cause GoBGP to crash, resulting     in a denial of service. (CVE-2026-41643)

    It was discovered that GoBGP incorrectly handled certain malformed BGP UPDATE messages containing SRv6 L3     Service attributes. A remote attacker could possibly use this issue to cause GoBGP to crash, resulting in     a denial of service. (CVE-2026-7734)

    It was discovered that GoBGP incorrectly handled certain malformed BGP UPDATE messages containing     Accumulated IGP (AIGP) attributes. A remote attacker could possibly use this issue to cause GoBGP to     crash, resulting in a denial of service. (CVE-2026-7735)

    It was discovered that GoBGP incorrectly handled certain malformed Multi- threaded Routing Toolkit (MRT)     routing information entries. A remote attacker could possibly use this issue to cause GoBGP to crash,     resulting in a denial of service. (CVE-2026-7736)

    It was discovered that GoBGP incorrectly handled certain malformed Multi- threaded Routing Toolkit (MRT)     headers. A remote attacker could possibly use this issue to cause GoBGP to crash, resulting in a denial of     service. (CVE-2026-7737)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A vulnerability has been found in osrg GoBGP up to 4.3.0. This impacts the function
    SRv6L3ServiceAttribute.DecodeFromBytes of the file pkg/packet/bgp/prefix_sid.go of the component SRv6 L3
    Service. Such manipulation of the argument data leads to denial of service. The attack may be performed
    from remote. Upgrading to version 4.4.0 will fix this issue. The name of the patch is
    f9f7b55ec258e514be0264871fa645a2c3edad11. You should upgrade the affected component. (CVE-2026-7734)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A vulnerability has been found in osrg GoBGP up to 4.3.0. This impacts the function     SRv6L3ServiceAttribute.DecodeFromBytes of the file pkg/packet/bgp/prefix_sid.go of the component SRv6 L3     Service. Such manipulation of the argument data leads to denial of service. The attack may be performed     from remote. Upgrading to version 4.4.0 will fix this issue. The name of the patch is     f9f7b55ec258e514be0264871fa645a2c3edad11. You should upgrade the affected component. (CVE-2026-7734)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
318621	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : GoBGP vulnerabilities (USN-8348-1)	Nessus	Ubuntu Local Security Checks	Local	medium
441565	SCA: security update for github.com/osrg/gobgp/v4 (GHSA-vm3g-8xwv-mxfp)	Tenable Cloud Security	SCA Checks	Local	medium
441565	SCA: security update for github.com/osrg/gobgp/v4 (GHSA-vm3g-8xwv-mxfp)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
312047	Linux Distros Unpatched Vulnerability : CVE-2026-7734	Nessus	Misc.	Local	medium

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CVE-2026-7734

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