UBUNTU-CVE-2026-115723

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Source

https://ubuntu.com/security/CVE-2026-115723

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115723.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-115723

Upstream

CVE-2026-115723

Published

2026-10-23T12:18:00Z

Modified

2026-10-28T17:50:38Z

Severity

7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H CVSS Calculator
8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Snap7 through 1.4.3 contains an out-of-bounds write vulnerability in the passive partner that allows a malicious active partner to overflow application buffers by declaring an unvalidated BSend total length. Attackers connecting from the configured peer address can declare up to 65535 bytes and send a short fragment, causing BRecv to memcpy past the buffer and crash or corrupt SCADA, HMI or gateway processes.

References

Affected packages

Ubuntu:26.10 / snap7

Package

Name: snap7
Purl: pkg:deb/ubuntu/snap7?arch=source&distro=stonking

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.4.2+dfsg-1build1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libsnap7-1",
            "binary_version":  "1.4.2+dfsg-1build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115723.json"

Ubuntu:26.04:LTS / snap7