CVE-2022-24884

CRITICALNVD 10.010.0
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 10.0 under NVD CVSS v3. EPSS exploit probability: 1.0% (63rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this week
10.0EG
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: 1.0%CVSS: 10.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

ecdsautils is a tiny collection of programs used for ECDSA (keygen, sign, verify). ecdsa_verify_[prepare_]legacy() does not check whether the signature values r and s are non-zero. A signature consisting only of zeroes is always considered valid, making it trivial to forge signatures. Requiring multiple signatures from different public keys does not mitigate the issue: ecdsa_verify_list_legacy() will accept an arbitrary number of such forged signatures. Both the ecdsautil verify CLI command and the libecdsautil library are affected. The issue has been fixed in ecdsautils 0.4.1. All older versions of ecdsautils (including versions before the split into a library and a CLI utility) are vulnerable.

CVSS v3
10.0
EG Score
10.0CRITICALmedium confidence
EG Risk
60
EG Risk 60/100

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)
Severity100% × 45%
Impact severity (EG Severity): CVSS 10.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.0% × 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 total (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
1.0%
EPSS %ILE
63rd
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 (10.0): severity, escalated by confirmed exploitation. This CVE's 10.0 is its impact severity (EG Severity), not escalated.

EG Severity
10.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
1.0% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-23). 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: 3 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 total (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)3 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 total (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

May 6, 2022

Last Modified

November 21, 2024

Advisory Details (8)

Auto-updated Oct 17, 2026
Patch available. Sources: github_commit, github.
GitHub commit

commit 39b6d0a77414 (freifunk-gluon/ecdsautils)

Fix landed in freifunk-gluon/ecdsautils commit 39b6d0a77414 — awaiting tagged release

https://github.com/freifunk-gluon/ecdsautils/commit/39b6d0a77414fd41614953a0e185c4eefa2f88ad
GitHub commit

commit 1d4b091abdf1 (freifunk-gluon/ecdsautils)

Fix landed in freifunk-gluon/ecdsautils commit 1d4b091abdf1 — awaiting tagged release

https://github.com/freifunk-gluon/ecdsautils/commit/1d4b091abdf15ad7b2312535b5b95ad70f6dbd08
Web page

[SECURITY] [DSA 5132-1] ecdsautils security update

https://www.debian.org/security/2022/dsa-5132
Web page

[SECURITY] Fedora 34 Update: ecdsautils-0.4.1-1.fc34 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7UBR3M4U3LA46BHXYSH7EN5GDG44GK7/
Web page

[SECURITY] Fedora 36 Update: ecdsautils-0.4.1-1.fc36 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G2JT57AAFIEL7JDO2ZBV25JKYME5NU54/
Web page

[SECURITY] Fedora 35 Update: ecdsautils-0.4.1-1.fc35 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4AKQH5WCBMJA3ODCSNERY6HVX4BX3ITG/
Web pageMentions a patch (unverified)

[SECURITY] [DLA 2997-1] ecdsautils security update

https://lists.debian.org/debian-lts-announce/2022/05/msg00007.html
GitHub advisoryMentions a patch (unverified)

Improper Verification of ECDSA Signatures · Advisory · freifunk-gluon/ecdsautils · GitHub

https://github.com/freifunk-gluon/ecdsautils/security/advisories/GHSA-qhcg-9ffp-78pw

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuecdsautils (0.3.2+git20151018-2+deb10u1build0.20.04.1) @ focal2026-10-23ubuntu

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

(6 across 6 ecosystems)
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils0.3.2+git20151018-2
  • every version up to 0.3.2+git20151018-2+deb10u1: fixed in 0.3.2+git20151018-2+deb10u1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils0.3.2+git20151018-2
  • every version up to 0.3.2+git20151018-2+deb11u1: fixed in 0.3.2+git20151018-2+deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils—
  • every version up to 0.4.1-1: fixed in 0.4.1-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils—
  • every version up to 0.4.1-1: fixed in 0.4.1-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils—
  • every version up to 0.4.1-1: fixed in 0.4.1-1
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
ecdsautils0.3.2+git20151018-2
  • every version up to 0.3.2+git20151018-2+deb9u1: fixed in 0.3.2+git20151018-2+deb9u1
—

Weakness Classification(1)

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

All Vendor Advisories

(1)

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 18× in last 7d / 45× 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 97 of 199 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 102 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-23 19:53 UTCEG score recompute
  2. 2026-10-23 19:53 UTCVendor advisory
  3. 2026-10-23 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  4. 2026-10-22 17:44 UTCEG score recompute
  5. 2026-10-22 16:30 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  6. 2026-10-21 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  7. 2026-10-21 15:34 UTCEG score recompute
  8. 2026-10-21 15:34 UTCVendor advisory
  9. 2026-10-20 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  10. 2026-10-20 13:22 UTCEG score recompute
  11. 2026-10-20 13:22 UTCVendor advisory
  12. 2026-10-19 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  13. 2026-10-19 11:12 UTCEG score recompute
  14. 2026-10-19 11:12 UTCVendor advisory
  15. 2026-10-18 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  16. 2026-10-18 08:24 UTCEG score recompute
  17. 2026-10-17 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  18. 2026-10-17 06:14 UTCEG score recompute
  19. 2026-10-16 16:34 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  20. 2026-10-16 04:03 UTCEG score recompute
  21. 2026-10-15 16:28 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  22. 2026-10-15 00:59 UTCEG score recompute
  23. 2026-10-14 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  24. 2026-10-13 22:13 UTCEG score recompute
  25. 2026-10-13 16:29 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
Show 72 more
  1. 2026-10-12 18:56 UTCEG score recompute
  2. 2026-10-12 16:30 UTCEPSS rescoreEPSS 1.0% · 63rd percentile
  3. 2026-10-11 23:24 UTCEG score recompute
  4. 2026-10-11 13:44 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  5. 2026-10-10 19:56 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  6. 2026-10-09 20:04 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  7. 2026-10-08 16:40 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  8. 2026-10-07 23:45 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  9. 2026-10-06 15:14 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  10. 2026-10-05 17:40 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  11. 2026-10-04 23:19 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  12. 2026-10-03 14:22 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  13. 2026-09-30 15:51 UTCEG score recompute
  14. 2026-09-30 15:00 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  15. 2026-09-29 15:15 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  16. 2026-09-28 13:48 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  17. 2026-09-27 13:41 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  18. 2026-09-26 00:22 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  19. 2026-09-24 23:14 UTCOSV refresh
  20. 2026-09-24 14:00 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  21. 2026-09-23 13:45 UTCEPSS rescoreEPSS 1.0% · 62nd percentile
  22. 2026-09-20 20:13 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  23. 2026-09-17 19:23 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  24. 2026-09-16 14:05 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  25. 2026-09-15 03:06 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  26. 2026-09-12 14:57 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  27. 2026-09-11 14:49 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  28. 2026-09-11 09:33 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  29. 2026-09-08 21:57 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  30. 2026-09-07 15:58 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  31. 2026-09-06 13:45 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  32. 2026-09-05 15:25 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  33. 2026-09-05 14:56 UTCOSV refresh
  34. 2026-09-04 13:57 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  35. 2026-09-04 05:04 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  36. 2026-09-02 14:09 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  37. 2026-09-01 13:51 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  38. 2026-08-30 19:14 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  39. 2026-08-30 01:19 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  40. 2026-08-28 21:38 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  41. 2026-08-27 14:22 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  42. 2026-08-26 14:43 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  43. 2026-08-25 13:46 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  44. 2026-08-24 14:13 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  45. 2026-08-21 23:46 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  46. 2026-08-20 22:52 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  47. 2026-08-19 17:01 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  48. 2026-08-19 01:59 UTCOSV refresh
  49. 2026-08-18 13:45 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  50. 2026-08-16 14:53 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  51. 2026-08-16 02:11 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  52. 2026-08-15 01:27 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  53. 2026-08-13 21:57 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  54. 2026-08-12 13:48 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  55. 2026-08-09 13:44 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  56. 2026-08-08 16:34 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  57. 2026-08-07 16:24 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  58. 2026-08-06 13:44 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  59. 2026-08-05 19:15 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  60. 2026-08-04 10:34 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  61. 2026-08-03 21:27 UTCOSV refresh
  62. 2026-08-03 10:33 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  63. 2026-08-02 02:24 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  64. 2026-08-01 04:13 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  65. 2026-07-30 16:25 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  66. 2026-07-30 01:28 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  67. 2026-07-28 15:33 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  68. 2026-07-26 14:52 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  69. 2026-07-25 14:15 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  70. 2026-07-24 14:15 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  71. 2026-07-23 14:16 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  72. 2026-07-23 02:09 UTCEG score recompute

Frequently asked(5)

What is CVE-2022-24884?
CVE-2022-24884 is a critical-severity vulnerability; its CVE record was published on May 6, 2022. ecdsautils is a tiny collection of programs used for ECDSA (keygen, sign, verify). ecdsaverify[prepare]legacy() does not check whether the signature values r and s are non-zero. A signature consisting only of zeroes is always considered valid, making it trivial to forge signatures. Requiring…
When was the CVE record for CVE-2022-24884 published?
The CVE record for CVE-2022-24884 was published on May 6, 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 November 21, 2024; the record at its source may have been updated since.
Is CVE-2022-24884 actively exploited?
CVE-2022-24884 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (63rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2022-24884?
CVE-2022-24884 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2022-24884?
A fix for CVE-2022-24884 is available: update to the fixed version the vendor names in its advisory.

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