CVE-2018-19115

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

keepalived before 2.0.7 has a heap-based buffer overflow when parsing HTTP status codes resulting in DoS or possibly unspecified other impact, because extract_status_code in lib/html.c has no validation of the status code and instead writes an unlimited amount of data to the heap.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation4% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
4%
EPSS %ILE
89%
KEV
Not listed

Published

November 8, 2018

Last Modified

November 21, 2024

Advisory Details (8)

Auto-updated Sep 3, 2026
Patch available. Sources: redhat, github_pr.
generic

Keepalived: Multiple vulnerabilities (GLSA 201903-01) — Gentoo security

https://security.gentoo.org/glsa/201903-01
generic Patch Available

[SECURITY] [DLA-1589-1] keepalived security update

https://lists.debian.org/debian-lts-announce/2018/11/msg00034.html
github_pr

Fix buffer overflow in extract_status_code()

Fix merged in acassen/keepalived PR #961 on 2018-07-24 — awaiting tagged release

https://github.com/acassen/keepalived/pull/961/commits/f28015671a4b04785859d1b4b1327b367b6a10e9
github_pr

Fix buffer overflow in extract_status_code()

Fix merged in acassen/keepalived PR #961 on 2018-07-24 — awaiting tagged release

https://github.com/acassen/keepalived/pull/961
generic

Making sure you're not a bot!

https://bugzilla.suse.com/show_bug.cgi?id=1015141
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.4 Extended Update Support.

https://access.redhat.com/errata/RHSA-2019:1945
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.5 Extended Update Support.

https://access.redhat.com/errata/RHSA-2019:1792
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2019:0022

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntukeepalived (1:1.3.9-1ubuntu1.1) @ cosmic2026-05-28ubuntu
ubuntukeepalived (1:1.2.7-1ubuntu1+esm1) @ trusty2026-05-28ubuntu
redhatkeepalived-0:1.3.5-1.el7_4.12019-07-30redhat
redhatkeepalived-0:1.3.5-7.el7_5.22019-07-16redhat
redhatkeepalived-0:1.3.5-8.el7_62019-01-03redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
keepalived—1:2.0.10-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
keepalived—1:2.0.10-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
keepalived—1:2.0.10-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
keepalived—1:2.0.10-1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
keepalived1:1.2.13-11:1.2.13-1+deb8u1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 24× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 137 total refreshes for this CVE.

  1. 2026-09-07 15:57 UTCEPSS rescore
  2. 2026-09-06 13:43 UTCEPSS rescore
  3. 2026-09-05 15:24 UTCEPSS rescore
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  13. 2026-08-22 06:37 UTCOSV refresh
  14. 2026-08-21 23:45 UTCEPSS rescore
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  1. 2026-08-07 16:23 UTCEPSS rescore
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  3. 2026-08-06 09:45 UTCOSV refresh
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  5. 2026-08-04 15:05 UTCEPSS rescore
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  8. 2026-07-30 16:24 UTCEPSS rescore
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  10. 2026-07-28 15:32 UTCEPSS rescore
  11. 2026-07-26 14:51 UTCEPSS rescore
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  17. 2026-07-23 01:35 UTCEG score recompute
  18. 2026-07-22 22:15 UTCEG score recompute
  19. 2026-07-22 14:05 UTCEPSS rescore
  20. 2026-07-21 15:22 UTCEPSS rescore
  21. 2026-07-21 03:11 UTCOSV refresh
  22. 2026-07-20 17:04 UTCEPSS rescore
  23. 2026-07-20 17:04 UTCEPSS rescore
  24. 2026-07-19 14:28 UTCEPSS rescore
  25. 2026-07-19 02:26 UTCEPSS rescore
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  27. 2026-07-16 16:59 UTCEPSS rescore
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  38. 2026-07-09 19:06 UTCEPSS rescore
  39. 2026-07-08 15:11 UTCEPSS rescore
  40. 2026-07-07 13:42 UTCEPSS rescore
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  42. 2026-07-06 16:24 UTCEPSS rescore
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  44. 2026-07-06 02:20 UTCEPSS rescore
  45. 2026-07-05 02:27 UTCEPSS rescore
  46. 2026-07-04 06:28 UTCEPSS rescore
  47. 2026-07-04 06:28 UTCEPSS rescore
  48. 2026-07-03 22:26 UTCOSV refresh
  49. 2026-07-02 16:54 UTCEPSS rescore
  50. 2026-07-01 15:03 UTCEPSS rescore
  51. 2026-07-01 15:03 UTCEPSS rescore
  52. 2026-06-30 23:20 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2018-19115?
CVE-2018-19115 is a critical vulnerability published on November 8, 2018. keepalived before 2.0.7 has a heap-based buffer overflow when parsing HTTP status codes resulting in DoS or possibly unspecified other impact, because extractstatuscode in lib/html.c has no validation of the status code and instead writes an unlimited amount of data to the heap.
When was CVE-2018-19115 disclosed?
CVE-2018-19115 was first published in the National Vulnerability Database on November 8, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-19115 actively exploited?
CVE-2018-19115 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4% probability of exploitation in the next 30 days, which ranks it in the top 10.9% of all scored CVEs.
What is the CVSS score of CVE-2018-19115?
CVE-2018-19115 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2018-19115?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-19115, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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