UBUNTU-CVE-2026-111280

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Source

https://ubuntu.com/security/CVE-2026-111280

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-111280.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-111280

Upstream

CVE-2026-111280

Published

2026-10-16T00:00:00Z

Modified

2026-10-17T12:58:04Z

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 TSnap7MicroClient::opReadArea() that allows malicious S7 peers to overflow client buffers via an unchecked DataLength field. Rogue or impersonated PLCs can return crafted ReadVar responses causing memcpy of up to 65535 bytes into caller buffers, crashing SCADA, HMI, or gateway processes and corrupting memory.

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-2026-111280.json"

Ubuntu:26.04:LTS / snap7