Read the docs
TI-2015-01639 Aliases CVE-2015-1822GHSA-rchf-p2rm-hg6h

chrony before 1.31.1 does not initialize the last "next" pointer when saving…

Priority LOW 34CWE-17Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.

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.

Why it matters now

EPSS 0.02936 87th percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
cpe:2.3:a:tuxfamily:chrony:*:*:*:*:*:*:*:*up to 1.31VulnerableTuxfamily
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
  • cpe:2.3:a:tuxfamily:chrony:*:*:*:*:*:*:*:* Versions up to 1.31 Vulnerable ·Tuxfamily

Remediation

Red Hat 1 advisory

  • RHSA-2015:2241 Released 2015-11-19 · Red Hat rating Moderate
    chrony security, bug fix, and enhancement update
    • 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

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2015:2241
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2015:2241
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2015:2241
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2015:2241

Timeline

  1. 2026-10-02 Threatist record created from CVE-2015-1822
  2. 2026-10-03 Alias added: GHSA-rchf-p2rm-hg6h

References

Patch 1

Advisory 2

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences