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Fencer Intel
medium 6.5

CVE-2015-1822 json

chrony before 1.31.1 does not initialize the last "next" pointer when saving unacknowledged replies to command requests, which allows remot…

published 2015-04-16 11 y ago modified 2026-06-17 4 mo ago also EUVD-2015-1942

cvss
6.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

chrony before 1.31.1 does not initialize the last "next" pointer when saving unacknowledged replies to command requests, which allows remote authenticated users to cause a denial of service (uninitialized pointer dereference and daemon crash) or possibly execute arbitrary code via a large number of command requests.

Patch / fix

  • chrony Debian 14, Debian 13, Debian 12 1.30-2

debian advisories DEBIAN-CVE-2015-1822

  • chrony Ubuntu 14.04 LTS 1.29-1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2015-1822

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • chrony RHEL 7 2.1.1-1.el7

red hat advisories RHSA-2015:2241

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-1822 updated cvss 6.0

chrony: uninitialized pointer in cmdmon reply slots

  • Red Hat Enterprise Linux Client (v. 7) chrony 2.1.1-1.el7 Red Hat Enterprise Linux ComputeNode (v. 7) chrony 2.1.1-1.el7 Red Hat Enterprise Linux Server (v. 7) chrony 2.1.1-1.el7 Red Hat Enterprise Linux Workstation (v. 7) chrony 2.1.1-1.el7
    fixed: vendor fix RHSA-2015:2241

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.94% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.