MEDIUM
CVE-2026-9639
CWE-476Published: June 26, 2026· Updated: Jul 2, 2026
6.5
CVSS v3.1
EPSS:0.38%probability of exploitation in 30 daysPercentile:29.4th
Official Description
Nil-pointer dereference in CreateCustomVolumeFromBackup in LXD up to version 6.8 and 5.21 on Linux allows an authenticated user with can_create_storage_volumes permissions to cause a denial of service via a specially crafted custom-volume backup tarball that omits the expires_at snapshot field.
Technical Analysis
CVE-2026-9639 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Canonical1 product
lxd
Linux1 product
linux kernel
Source: NVD CPE · 2 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (4)
→
https://github.com/canonical/lxd/pull/18320Issue Tracking · Patch
→
https://github.com/canonical/lxd/pull/18390Issue Tracking · Patch
→
https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8Exploit · Patch · Vendor Advisory
→
https://github.com/canonical/lxd/security/advisories/GHSA-j93m-3j9p-m5m8Exploit · Patch · Vendor Advisory
Quick Facts
CVE IDCVE-2026-9639
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-476
CISA KEVNo
EPSS (30d)0.38%
Affected2 vendors
PublishedJun 26, 2026
Related CVEs (CWE-476)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-9639 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.