UBUNTU-CVE-2026-115505

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Source

https://ubuntu.com/security/CVE-2026-115505

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115505.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-115505

Upstream

CVE-2026-115505

Published

2026-10-26T00:00:00Z

Modified

2026-10-27T04:17:48Z

Severity

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

Summary

[none]

Details

libsmb2 before 6.3 contains integer overflow vulnerabilities in the DCE/RPC NDR decoder in lib/dcerpc.c that allow heap out-of-bounds reads and writes. A malicious SMB server or machine-in-the-middle on unsigned connections can send crafted NetrShareEnum replies with wrapping actual_count or max_count values when clients call smb2_share_enum_async(), corrupting heap memory.

References

Affected packages

Ubuntu:26.10 / libsmb2

Package

Name: libsmb2
Purl: pkg:deb/ubuntu/libsmb2?arch=source&distro=stonking

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

6.*

6.2+dfsg-3

6.2+dfsg-4

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libsmb2-6",
            "binary_version":  "6.2+dfsg-4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-115505.json"

Ubuntu:26.04:LTS / libsmb2