UBUNTU-CVE-2026-110714

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Source
https://ubuntu.com/security/CVE-2026-110714
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-110714.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-110714
Upstream
Published
2026-10-15T00:00:00Z
Modified
2026-10-17T12:58:03Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

libsmb2 through 6.2 contains an integer underflow vulnerability in decode_acl that allows malicious SMB servers to trigger heap out-of-bounds reads via crafted security descriptors. Attackers controlling a server or intercepting unsigned sessions can send an AclSize below 8 in a QUERY_INFO reply, bypassing ACE bounds checks and crashing the client.

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-2026-110714.json"

Ubuntu:26.04:LTS / libsmb2

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

6.*
6.2+dfsg-2
6.2+dfsg-3

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libsmb2-6",
            "binary_version":  "6.2+dfsg-3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-110714.json"