What is CVE-2015-1340?

CVE-2015-1340 is a high-severity vulnerability in Linuxcontainers Lxd, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.0/10. Published 2019-04-22.

How severe is CVE-2015-1340?

High severity. CVSS v3 base score is 7.0 out of 10.

Vulnerability in Linuxcontainers Lxd

CVE-2015-1340

LXD before version 0.19-0ubuntu5 doUidshiftIntoContainer() has an unsafe Chmod() call that races against the stat in the Filepath.Walk() function. A symbolic link created in that window could cause any file on the system to have any mode of the attacker's choice.

Vulnerability class: Race Condition

Published 2019-04-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.0/AV:P/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Linuxcontainers Lxd
Ubuntu Lxd — versions unspecified

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

github.com/lxc/lxd/commit/19c6961cc1012c8a529f20807328a9357f5034f4 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2015-1340?: CVE-2015-1340 is a high-severity vulnerability in Linuxcontainers Lxd, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.0/10. Published 2019-04-22.
How severe is CVE-2015-1340?: High severity. CVSS v3 base score is 7.0 out of 10.