CVE-2021-27219

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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 3.0%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

An issue was discovered in GNOME GLib before 2.66.6 and 2.67.x before 2.67.3. The function g_bytes_new has an integer overflow on 64-bit platforms due to an implicit cast from 64 bits to 32 bits. The overflow could potentially lead to memory corruption.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
39
EG Risk 39/100CISA SSVC

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
Severity75% × 45%
Exploitation3% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
3.0%
EPSS %ILE
86th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

February 15, 2021

Last Modified

November 21, 2024

References (14)

Vendor Advisories for CVE-2021-27219(4)

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

Patch Availability(15)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibglib2.0-udeb (2.64.6-1~ubuntu20.04.2) @ focal2026-05-26ubuntu
redhatmingw-glib2-0:2.66.7-2.el82021-11-09redhat
redhatrhmtc/openshift-velero-plugin-rhel8:v1.4.6-42021-07-21redhat
redhatredhat-virtualization-host-0:4.4.6-20210615.0.el8_42021-06-22redhat
redhatredhat-virtualization-host-0:4.3.16-20210615.0.el7_92021-06-22redhat
redhatglib2-0:2.28.8-11.el6_102021-06-17redhat
redhatglib2-0:2.42.2-6.el7_22021-06-02redhat
redhatglib2-0:2.56.1-5.el7_62021-06-02redhat
redhatglib2-0:2.56.1-6.el7_72021-06-01redhat
redhatglib2-0:2.56.4-8.el8_12021-06-01redhat
redhatglib2-0:2.56.4-10.el8_42021-06-01redhat
redhatglib2-0:2.46.2-5.el7_32021-06-01redhat
redhatglib2-0:2.50.3-4.el7_42021-06-01redhat
redhatglib2-0:2.56.4-8.el8_2.12021-06-01redhat
redhatglib2-0:2.56.1-9.el7_92021-05-31redhat

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

(17 across 17 ecosystems)
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
glib—
  • 2.67.0 up to 2.66.6-r0: fixed in 2.66.6-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
glib2.0—
  • every version up to 2.66.6-1: fixed in 2.66.6-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
glib2.0—
  • every version up to 2.66.6-1: fixed in 2.66.6-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
glib2.0—
  • every version up to 2.66.6-1: fixed in 2.66.6-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
glib2.0—
  • every version up to 2.66.6-1: fixed in 2.66.6-1
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
glib2.02.50.3-2, 2.50.3-2+deb9u1, 2.50.3-2+deb9u2
  • every version up to 2.50.3-2+deb9u3: fixed in 2.50.3-2+deb9u3
—

Weakness Classification(1)

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

Additional Vendor Advisories

(12)

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 7× in last 7d / 31× 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 183 total refreshes for this CVE.

  1. 2026-10-09 20:04 UTCEPSS rescore
  2. 2026-10-08 16:39 UTCEPSS rescore
  3. 2026-10-07 23:44 UTCEPSS rescore
  4. 2026-10-06 15:14 UTCEPSS rescore
  5. 2026-10-05 17:40 UTCEPSS rescore
  6. 2026-10-03 14:22 UTCEPSS rescore
  7. 2026-10-03 14:22 UTCEPSS rescore
  8. 2026-10-02 16:22 UTCEPSS rescore
  9. 2026-10-01 19:46 UTCEPSS rescore
  10. 2026-09-30 15:33 UTCEG score recompute
  11. 2026-09-30 15:00 UTCEPSS rescore
  12. 2026-09-29 15:15 UTCEPSS rescore
  13. 2026-09-28 13:47 UTCEPSS rescore
  14. 2026-09-26 15:54 UTCEPSS rescore
  15. 2026-09-26 15:54 UTCEPSS rescore
  16. 2026-09-26 09:25 UTCOSV refresh
  17. 2026-09-26 00:21 UTCEPSS rescore
  18. 2026-09-24 14:00 UTCEPSS rescore
  19. 2026-09-23 13:44 UTCEPSS rescore
  20. 2026-09-21 20:28 UTCEPSS rescore
  21. 2026-09-19 15:37 UTCEPSS rescore
  22. 2026-09-18 19:23 UTCEPSS rescore
  23. 2026-09-17 19:23 UTCEPSS rescore
  24. 2026-09-17 19:23 UTCEPSS rescore
  25. 2026-09-16 14:05 UTCEPSS rescore
Show 75 more
  1. 2026-09-15 03:06 UTCEPSS rescore
  2. 2026-09-15 03:06 UTCEPSS rescore
  3. 2026-09-13 16:43 UTCEPSS rescore
  4. 2026-09-12 14:57 UTCEPSS rescore
  5. 2026-09-11 14:49 UTCEPSS rescore
  6. 2026-09-11 09:33 UTCEPSS rescore
  7. 2026-09-08 21:56 UTCEPSS rescore
  8. 2026-09-07 15:58 UTCEPSS rescore
  9. 2026-09-06 22:13 UTCOSV refresh
  10. 2026-09-06 13:44 UTCEPSS rescore
  11. 2026-09-05 15:25 UTCEPSS rescore
  12. 2026-09-04 13:57 UTCEPSS rescore
  13. 2026-09-04 05:03 UTCEPSS rescore
  14. 2026-09-04 05:03 UTCEPSS rescore
  15. 2026-09-02 14:08 UTCEPSS rescore
  16. 2026-09-01 13:50 UTCEPSS rescore
  17. 2026-09-01 03:32 UTCEPSS rescore
  18. 2026-08-30 19:14 UTCEPSS rescore
  19. 2026-08-30 01:19 UTCEPSS rescore
  20. 2026-08-28 21:37 UTCEPSS rescore
  21. 2026-08-27 14:22 UTCEPSS rescore
  22. 2026-08-26 14:42 UTCEPSS rescore
  23. 2026-08-25 13:45 UTCEPSS rescore
  24. 2026-08-24 14:12 UTCEPSS rescore
  25. 2026-08-23 00:16 UTCEPSS rescore
  26. 2026-08-21 23:46 UTCEPSS rescore
  27. 2026-08-20 22:52 UTCEPSS rescore
  28. 2026-08-20 08:31 UTCOSV refresh
  29. 2026-08-19 17:01 UTCEPSS rescore
  30. 2026-08-18 13:45 UTCEPSS rescore
  31. 2026-08-17 13:44 UTCEPSS rescore
  32. 2026-08-16 14:53 UTCEPSS rescore
  33. 2026-08-16 02:11 UTCEPSS rescore
  34. 2026-08-16 02:11 UTCEPSS rescore
  35. 2026-08-15 01:27 UTCEPSS rescore
  36. 2026-08-13 21:57 UTCEPSS rescore
  37. 2026-08-12 13:47 UTCEPSS rescore
  38. 2026-08-11 13:38 UTCEPSS rescore
  39. 2026-08-09 13:43 UTCEPSS rescore
  40. 2026-08-08 16:33 UTCEPSS rescore
  41. 2026-08-07 16:23 UTCEPSS rescore
  42. 2026-08-06 13:43 UTCEPSS rescore
  43. 2026-08-05 19:14 UTCEPSS rescore
  44. 2026-08-05 03:41 UTCOSV refresh
  45. 2026-08-04 15:06 UTCEPSS rescore
  46. 2026-08-04 10:34 UTCEPSS rescore
  47. 2026-08-03 10:33 UTCEPSS rescore
  48. 2026-08-02 02:24 UTCEPSS rescore
  49. 2026-08-01 04:13 UTCEPSS rescore
  50. 2026-07-30 16:25 UTCEPSS rescore
  51. 2026-07-30 16:25 UTCEPSS rescore
  52. 2026-07-30 01:28 UTCEPSS rescore
  53. 2026-07-30 01:27 UTCEPSS rescore
  54. 2026-07-28 15:33 UTCEPSS rescore
  55. 2026-07-26 14:52 UTCEPSS rescore
  56. 2026-07-26 14:52 UTCEPSS rescore
  57. 2026-07-25 14:15 UTCEPSS rescore
  58. 2026-07-24 14:15 UTCEPSS rescore
  59. 2026-07-23 14:16 UTCEPSS rescore
  60. 2026-07-23 01:59 UTCEG score recompute
  61. 2026-07-22 22:45 UTCEG score recompute
  62. 2026-07-22 14:06 UTCEPSS rescore
  63. 2026-07-22 14:06 UTCEPSS rescore
  64. 2026-07-21 15:22 UTCEPSS rescore
  65. 2026-07-21 15:22 UTCEPSS rescore
  66. 2026-07-20 17:05 UTCEPSS rescore
  67. 2026-07-19 14:28 UTCEPSS rescore
  68. 2026-07-19 02:27 UTCEPSS rescore
  69. 2026-07-19 02:27 UTCEPSS rescore
  70. 2026-07-19 01:59 UTCOSV refresh
  71. 2026-07-18 10:02 UTCEPSS rescore
  72. 2026-07-18 10:02 UTCEPSS rescore
  73. 2026-07-16 17:00 UTCEPSS rescore
  74. 2026-07-15 16:55 UTCEPSS rescore
  75. 2026-07-15 16:55 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2021-27219?
CVE-2021-27219 is a high vulnerability published on February 15, 2021. An issue was discovered in GNOME GLib before 2.66.6 and 2.67.x before 2.67.3. The function gbytesnew has an integer overflow on 64-bit platforms due to an implicit cast from 64 bits to 32 bits. The overflow could potentially lead to memory corruption.
When was CVE-2021-27219 disclosed?
CVE-2021-27219 was first published on February 15, 2021, 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-2021-27219 actively exploited?
CVE-2021-27219 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.0% probability of exploitation in the next 30 days (86th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2021-27219?
CVE-2021-27219 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2021-27219?
A fix for CVE-2021-27219 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2021-27219 are linked in the Vendor Advisories panel on this page.

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