CVE-2022-25314

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-02-19. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4.8%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In Expat (aka libexpat) before 2.4.5, there is an integer overflow in copyString.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
51
EG Risk 51/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation4.8% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
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
4.8%
EPSS %ILE
91st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
4.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-20). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; 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 (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

February 18, 2022

Last Modified

October 14, 2026

Advisory Details (8)

Auto-updated Oct 14, 2026
Patch available. Sources: github_pr.
Web page

oss-security - Expat 2.4.5 released, includes 5 security fixes

http://www.openwall.com/lists/oss-security/2022/02/19/1
Web page

[SECURITY] [DSA 5085-1] expat security update

https://www.debian.org/security/2022/dsa-5085
Web page

Expat: Multiple Vulnerabilities (GLSA 202209-24) — Gentoo security

https://security.gentoo.org/glsa/202209-24
Web page

[SECURITY] Fedora 35 Update: mingw-expat-2.4.6-1.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y27XO3JMKAOMQZVPS3B4MJGEAHCZF5OM/
Web page

[SECURITY] Fedora 34 Update: mingw-expat-2.4.6-1.fc34 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UFRBA3UQVIQKXTBUQXDWQOVWNBKLERU/
GitHub pull request

[CVE-2022-25314] lib: Prevent integer overflow in copyString

Fix merged in libexpat/libexpat PR #560 on 2022-02-18 — awaiting tagged release

https://github.com/libexpat/libexpat/pull/560

Patch Availability(7)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulib64expat1 (2.1.0-4ubuntu1.4+esm6) @ trusty2026-10-21ubuntu
redhatexpat-0:2.2.10-1.el8_22025-12-09redhat
redhatexpat-0:2.2.10-1.el8_42025-12-04redhat
redhatmingw-expat-0:2.4.8-1.el82022-11-08redhat
redhatexpat2022-10-26redhat
redhatexpat-0:2.2.10-12.el9_0.22022-07-01redhat
redhatexpat-0:2.2.5-8.el8_6.22022-06-30redhat

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

(20 across 18 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
expat2.2.10-2, 2.2.10-2+deb11u1
  • every version up to 2.2.10-2+deb11u2: fixed in 2.2.10-2+deb11u2
—
libxmltok1.2-4, 1.2-4.1, 1.2-4.1~exp1, 1.2-4.2
  • every version on: no fix on record
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-1: fixed in 2.4.5-1
—
libxmltok1.2-4, 1.2-4.1, 1.2-4.1~exp1, 1.2-4.2
  • every version on: no fix on record
—
Alpine:v3.12(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.2.10-r2: fixed in 2.2.10-r2
—
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.2.10-r4: fixed in 2.2.10-r4
—
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-r0: fixed in 2.4.5-r0
—
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
expat2.2.6-2, 2.2.6-2+deb10u1, 2.2.6-2+deb10u2
  • every version up to 2.2.6-2+deb10u3: fixed in 2.2.6-2+deb10u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-1: fixed in 2.4.5-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
expat—
  • every version up to 2.4.5-1: fixed in 2.4.5-1
—

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 / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 96 of 193 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 97 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 16:28 UTCEPSS rescoreEPSS 4.8% · 91st percentile
  2. 2026-10-22 16:30 UTCEPSS rescoreEPSS 4.8% · 91st percentile
  3. 2026-10-21 16:28 UTCEPSS rescoreEPSS 4.8% · 91st percentile
  4. 2026-10-21 08:50 UTCEG score recompute
  5. 2026-10-21 08:50 UTCVendor advisory
  6. 2026-10-21 08:49 UTCGHSA enrichmentGHSA-3qc2-95g6-46cj · GitHub severity HIGH · GitHub CVSS 7.5
  7. 2026-10-20 16:29 UTCEPSS rescoreEPSS 4.8% · 91st percentile
  8. 2026-10-19 16:28 UTCEPSS rescoreEPSS 4.8% · 91st percentile
  9. 2026-10-18 16:28 UTCEPSS rescoreEPSS 4.8% · 91st percentile
  10. 2026-10-18 08:41 UTCEG score recompute
  11. 2026-10-17 16:29 UTCEPSS rescoreEPSS 4.8% · 91st percentile
  12. 2026-10-16 16:34 UTCEPSS rescoreEPSS 4.8% · 91st percentile
  13. 2026-10-15 16:28 UTCEPSS rescoreEPSS 4.8% · 91st percentile
  14. 2026-10-14 17:30 UTCVendor advisory
  15. 2026-10-14 17:30 UTCGHSA enrichmentGHSA-3qc2-95g6-46cj · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-10-14 16:35 UTCEG score recompute
  17. 2026-10-14 16:35 UTCVendor advisory
  18. 2026-10-14 16:35 UTCGHSA enrichmentGHSA-3qc2-95g6-46cj · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-10-14 16:29 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  20. 2026-10-13 16:29 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  21. 2026-10-12 18:58 UTCEG score recompute
  22. 2026-10-12 16:30 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  23. 2026-10-11 23:24 UTCEG score recompute
  24. 2026-10-11 13:44 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  25. 2026-10-10 19:56 UTCEPSS rescoreEPSS 4.7% · 91st percentile
Show 71 more
  1. 2026-10-09 20:04 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  2. 2026-10-08 16:40 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  3. 2026-10-07 23:45 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  4. 2026-10-06 15:14 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  5. 2026-10-05 17:40 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  6. 2026-10-04 23:19 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  7. 2026-10-03 14:22 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  8. 2026-09-30 15:51 UTCEG score recompute
  9. 2026-09-30 15:00 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  10. 2026-09-29 15:15 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  11. 2026-09-28 13:48 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  12. 2026-09-27 13:41 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  13. 2026-09-26 00:22 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  14. 2026-09-25 05:35 UTCOSV refresh
  15. 2026-09-24 14:00 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  16. 2026-09-23 13:45 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  17. 2026-09-20 20:13 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  18. 2026-09-17 19:23 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  19. 2026-09-16 14:05 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  20. 2026-09-15 03:06 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  21. 2026-09-13 16:43 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  22. 2026-09-12 14:57 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  23. 2026-09-11 14:49 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  24. 2026-09-11 09:33 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  25. 2026-09-08 21:57 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  26. 2026-09-07 15:58 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  27. 2026-09-06 13:45 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  28. 2026-09-05 21:00 UTCOSV refresh
  29. 2026-09-05 15:25 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  30. 2026-09-04 13:57 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  31. 2026-09-04 05:04 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  32. 2026-09-02 14:09 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  33. 2026-09-01 13:51 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  34. 2026-08-30 19:14 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  35. 2026-08-30 01:19 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  36. 2026-08-28 21:38 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  37. 2026-08-27 14:22 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  38. 2026-08-26 14:43 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  39. 2026-08-25 13:46 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  40. 2026-08-24 14:13 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  41. 2026-08-21 23:46 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  42. 2026-08-20 22:52 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  43. 2026-08-19 17:01 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  44. 2026-08-19 08:02 UTCOSV refresh
  45. 2026-08-18 13:45 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  46. 2026-08-17 13:44 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  47. 2026-08-16 14:53 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  48. 2026-08-16 02:11 UTCEPSS rescoreEPSS 4.7% · 91st percentile
  49. 2026-08-15 01:27 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  50. 2026-08-13 21:57 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  51. 2026-08-12 13:48 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  52. 2026-08-09 13:44 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  53. 2026-08-08 16:34 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  54. 2026-08-07 16:24 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  55. 2026-08-06 13:44 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  56. 2026-08-05 19:15 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  57. 2026-08-04 10:34 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  58. 2026-08-04 03:57 UTCOSV refresh
  59. 2026-08-03 10:33 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  60. 2026-08-02 02:24 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  61. 2026-08-01 04:13 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  62. 2026-07-30 16:25 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  63. 2026-07-30 01:28 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  64. 2026-07-28 15:33 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  65. 2026-07-26 14:52 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  66. 2026-07-25 14:15 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  67. 2026-07-24 14:15 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  68. 2026-07-23 14:16 UTCEPSS rescoreEPSS 4.7% · 90th percentile
  69. 2026-07-23 02:09 UTCEG score recompute
  70. 2026-07-22 22:56 UTCEG score recompute
  71. 2026-07-22 14:06 UTCEPSS rescoreEPSS 4.7% · 90th percentile

Frequently asked(5)

What is CVE-2022-25314?
CVE-2022-25314 is a high-severity vulnerability; its CVE record was published on February 18, 2022. In Expat (aka libexpat) before 2.4.5, there is an integer overflow in copyString.
When was the CVE record for CVE-2022-25314 published?
The CVE record for CVE-2022-25314 was published on February 18, 2022. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 14, 2026; the record at its source may have been updated since.
Is CVE-2022-25314 actively exploited?
CVE-2022-25314 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4.8% probability of exploitation in the next 30 days (91st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-25314?
CVE-2022-25314 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2022-25314?
A fix for CVE-2022-25314 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-25314 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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