CVE-2020-29573

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a \x00\x04\x00\x00\x00\x00\x00\x00\x00\x04 value to sprintf. NOTE: the issue does not affect glibc by default in 2016 or later (i.e., 2.23 or later) because of commits made in 2015 for inlining of C99 math functions through use of GCC built-ins. In other words, the reference to 2.23 is intentional despite the mention of "Fixed for glibc 2.33" in the 26649 reference.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
84.8%
KEV
Not listed

Published

December 6, 2020

Last Modified

November 21, 2024

References (8)

Vendor Advisories for CVE-2020-29573(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatglibc-0:2.17-260.el7_6.92021-08-31redhat
redhatglibc-0:2.17-292.el7_7.22021-08-03redhat
redhatglibc-0:2.17-196.el7_4.42021-07-20redhat
redhatopenshiftdo/odo-init-image-rhel7:1.1.3-22021-03-22redhat
redhatglibc-0:2.17-322.el7_92021-02-02redhat

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.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 44× 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. 2026-07-22 22:39 UTCEG score recompute
  2. 2026-07-22 14:05 UTCEPSS rescore
  3. 2026-07-21 15:22 UTCEPSS rescore
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  19. 2026-07-12 22:37 UTCOSV refresh
  20. 2026-07-12 05:44 UTCEPSS rescore
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  1. 2026-07-06 16:25 UTCEPSS rescore
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  17. 2026-06-24 08:20 UTCOSV refresh
  18. 2026-06-23 21:31 UTCEPSS rescore
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  42. 2026-06-07 11:59 UTCOSV refresh
  43. 2026-06-06 13:46 UTCEPSS rescore
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  45. 2026-06-05 22:45 UTCEPSS rescore
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  65. 2026-05-26 07:17 UTCEPSS rescore
  66. 2026-05-26 07:17 UTCEPSS rescore
  67. 2026-05-23 04:39 UTCEG score recompute
  68. 2026-05-23 04:39 UTCVendor advisory
  69. 2026-05-23 04:39 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2020-29573?
CVE-2020-29573 is a high vulnerability published on December 6, 2020. sysdeps/i386/ldbl2mpn.c in the GNU C Library (aka glibc or libc6) before 2.23 on x86 targets has a stack-based buffer overflow if the input to any of the printf family of functions is an 80-bit long double with a non-canonical bit pattern, as seen when passing a…
When was CVE-2020-29573 disclosed?
CVE-2020-29573 was first published in the National Vulnerability Database on December 6, 2020, 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-2020-29573 actively exploited?
CVE-2020-29573 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-29573?
CVE-2020-29573 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2020-29573?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-29573, 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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