CVE-2018-12896

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2022-05-14. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.5Exploit: NoneExposed: 0

A fix is available — apply it.

An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity55% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
46.9%
KEV
Not listed

Published

July 2, 2018

Last Modified

November 21, 2024

References (26)

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-unsigned-4.15.0-1036-azure (4.15.0-1036.38~14.04.2) @ trusty2026-05-28ubuntu
ubuntulinux-image-unsigned-4.15.0-43-lowlatency (4.15.0-43.46~16.04.1) @ xenial2026-05-28ubuntu
ubuntulinux-image-unsigned-4.15.0-43-lowlatency (4.15.0-43.46) @ bionic2026-05-28ubuntu
ubuntulinux-image-extra-3.13.0-164-generic (3.13.0-164.214) @ trusty2026-05-28ubuntu
ubuntulinux-image-extra-4.4.0-141-generic (4.4.0-141.167) @ xenial2026-05-28ubuntu
ubuntulinux-image-generic-lts-trusty (3.13.0.164.154) @ precise2026-05-28ubuntu
ubuntulinux-image-extra-4.4.0-141-generic (4.4.0-141.167~14.04.1) @ trusty2026-05-28ubuntu

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.

Weakness Classification(1)

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

All Vendor Advisories

(7)

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 12× in last 7d / 45× 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.

  1. 2026-07-23 14:15 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:33 UTCEG score recompute
  4. 2026-07-22 22:13 UTCEG score recompute
  5. 2026-07-22 14:04 UTCEPSS rescore
  6. 2026-07-21 15:21 UTCEPSS rescore
  7. 2026-07-21 10:17 UTCOSV refresh
  8. 2026-07-20 17:04 UTCEPSS rescore
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  1. 2026-07-06 16:24 UTCEPSS rescore
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  3. 2026-07-05 02:27 UTCEPSS rescore
  4. 2026-07-04 06:28 UTCEPSS rescore
  5. 2026-07-04 05:26 UTCOSV refresh
  6. 2026-07-02 16:54 UTCEPSS rescore
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  9. 2026-06-30 23:19 UTCEPSS rescore
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  18. 2026-06-24 14:02 UTCEPSS rescore
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  34. 2026-06-15 17:43 UTCOSV refresh
  35. 2026-06-14 23:14 UTCEPSS rescore
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  37. 2026-06-13 22:58 UTCEPSS rescore
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  39. 2026-06-12 23:09 UTCEPSS rescore
  40. 2026-06-11 13:57 UTCEPSS rescore
  41. 2026-06-10 22:16 UTCEPSS rescore
  42. 2026-06-10 13:19 UTCEPSS rescore
  43. 2026-06-08 14:14 UTCEPSS rescore
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  45. 2026-06-07 15:22 UTCEPSS rescore
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  47. 2026-06-06 13:45 UTCEPSS rescore
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  64. 2026-05-28 13:42 UTCEPSS rescore
  65. 2026-05-28 06:09 UTCEG score recompute
  66. 2026-05-28 06:09 UTCVendor advisory
  67. 2026-05-28 06:08 UTCGHSA enrichment
  68. 2026-05-27 13:38 UTCEPSS rescore
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  72. 2026-05-26 07:17 UTCEPSS rescore
  73. 2026-05-26 07:17 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2018-12896?
CVE-2018-12896 is a medium vulnerability published on July 2, 2018. An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INTMAX, but the accounting is int…
When was CVE-2018-12896 disclosed?
CVE-2018-12896 was first published in the National Vulnerability Database on July 2, 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-2018-12896 actively exploited?
CVE-2018-12896 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2018-12896?
CVE-2018-12896 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2018-12896?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-12896, 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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