CVE-2026-2100

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 1.3% (70th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 5.3 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-03-26) is not newer than that change (2026-10-29), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2026-16336 (ENISA EUVD) · GHSA-hq85-3f6c-jx84 (GitHub Security Advisories)Source: ENISA EUVD

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: 1.3%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in p11-kit. A remote attacker could exploit this vulnerability by calling the C_DeriveKey function on a remote token with specific IBM kyber or IBM btc derive mechanism parameters set to NULL. This could lead to the RPC-client attempting to return an uninitialized value, potentially resulting in a NULL dereference or undefined behavior. This issue may cause an application level denial of service or other unpredictable system states.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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.
Exploitation1.3% × 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
1.3%
EPSS %ILE
70th
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.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
1.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). 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, and whom BOD 26-04 binds: 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.

The score's inputs: 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

March 26, 2026

Last Modified

October 29, 2026

Advisory Details (9)

Auto-updated Jun 22, 2026
Patch available. Sources: redhat, github_pr.
GitHub pull request Patch Available

Fix issues found by static analysis

Patch available: p11-glue/p11-kit 0.26.2 (PR #740 merged 2026-01-27)

https://github.com/p11-glue/p11-kit/pull/740
Red HatMentions a patch (unverified)

2437308 – (CVE-2026-2100) CVE-2026-2100 p11-kit: NULL dereference via C_DeriveKey with specific NULL parameters

Affected: Red Hat Enterprise Linux 10

https://bugzilla.redhat.com/show_bug.cgi?id=2437308
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-2100
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:7065
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:27998
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:22634
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:21275
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:18599
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:18143

Patch Availability(15)

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

(5 across 5 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
p11-kit—
  • every version up to 0.26.2-r0: fixed in 0.26.2-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
p11-kit—
  • every version up to 0.26.2-r0: fixed in 0.26.2-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
p11-kit—
  • every version up to 0.26.2-r0: fixed in 0.26.2-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
p11-kit—
  • every version up to 0.26.2-r0: fixed in 0.26.2-r0
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
p11-kit0.25.10-1, 0.25.5-3, 0.25.9-1, 0.25.9-2, 0.26.2-1
  • every version up to 0.26.2-2: fixed in 0.26.2-2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 54× 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 347 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 251 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:44 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  2. 2026-11-01 16:34 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  3. 2026-10-31 16:32 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  4. 2026-10-30 16:34 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  5. 2026-10-29 16:33 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  6. 2026-10-29 14:26 UTCEG score recompute
  7. 2026-10-29 14:26 UTCVendor advisory
  8. 2026-10-29 14:26 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  9. 2026-10-29 00:22 UTCEG score recompute
  10. 2026-10-29 00:22 UTCVendor advisory
  11. 2026-10-29 00:22 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  12. 2026-10-28 16:32 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  13. 2026-10-27 16:31 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  14. 2026-10-26 16:31 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  15. 2026-10-25 16:32 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  16. 2026-10-25 14:43 UTCEG score recompute
  17. 2026-10-24 16:32 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  18. 2026-10-23 16:31 UTCEPSS rescoreEPSS 1.3% · 70th percentile
  19. 2026-10-22 16:34 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  20. 2026-10-21 19:46 UTCEG score recompute
  21. 2026-10-21 19:46 UTCVendor advisory
  22. 2026-10-21 19:46 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  23. 2026-10-21 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  24. 2026-10-20 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  25. 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.3% · 69th percentile
Show 71 more
  1. 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  2. 2026-10-18 03:56 UTCEG score recompute
  3. 2026-10-17 16:33 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  4. 2026-10-16 16:41 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  5. 2026-10-15 16:31 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  6. 2026-10-14 20:33 UTCVendor advisory
  7. 2026-10-14 20:33 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  8. 2026-10-14 19:38 UTCEG score recompute
  9. 2026-10-14 19:38 UTCVendor advisory
  10. 2026-10-14 19:38 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  11. 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.3% · 69th percentile
  12. 2026-10-14 04:28 UTCVendor advisory
  13. 2026-10-14 04:28 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  14. 2026-10-14 03:37 UTCEG score recompute
  15. 2026-10-14 03:37 UTCVendor advisory
  16. 2026-10-14 03:36 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  17. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  18. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  19. 2026-10-12 16:23 UTCEG score recompute
  20. 2026-10-11 20:05 UTCEG score recompute
  21. 2026-10-11 17:18 UTCEG score recompute
  22. 2026-10-11 14:50 UTCEG score recompute
  23. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  24. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  25. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  26. 2026-10-08 17:12 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  27. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  28. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  29. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  30. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  31. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  32. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  33. 2026-09-29 01:21 UTCVendor advisory
  34. 2026-09-29 01:21 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  35. 2026-09-29 00:57 UTCEG score recompute
  36. 2026-09-29 00:57 UTCVendor advisory
  37. 2026-09-29 00:57 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  38. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  39. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  40. 2026-09-26 00:26 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  41. 2026-09-25 13:45 UTCOSV refresh
  42. 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  43. 2026-09-18 19:27 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  44. 2026-09-17 19:30 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  45. 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  46. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  47. 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  48. 2026-09-12 15:01 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  49. 2026-09-11 14:52 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  50. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  51. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  52. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  53. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  54. 2026-09-06 04:25 UTCVendor advisory
  55. 2026-09-06 04:25 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  56. 2026-09-06 03:25 UTCEG score recompute
  57. 2026-09-06 03:25 UTCVendor advisory
  58. 2026-09-06 03:25 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  59. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  60. 2026-09-02 14:11 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  61. 2026-09-01 13:53 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  62. 2026-09-01 04:39 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  63. 2026-08-31 12:29 UTCVendor advisory
  64. 2026-08-31 12:29 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  65. 2026-08-31 11:40 UTCEG score recompute
  66. 2026-08-31 11:40 UTCVendor advisory
  67. 2026-08-31 11:40 UTCGHSA enrichmentGHSA-hq85-3f6c-jx84 · GitHub CVSS 5.3
  68. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  69. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  70. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.2% · 64th percentile
  71. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.2% · 64th percentile

Frequently asked(5)

What is CVE-2026-2100?
CVE-2026-2100 is a high-severity vulnerability; its CVE record was published on March 26, 2026. A flaw was found in p11-kit. A remote attacker could exploit this vulnerability by calling the C_DeriveKey function on a remote token with specific IBM kyber or IBM btc derive mechanism parameters set to NULL. This could lead to the RPC-client attempting to return an uninitialized value,…
When was CVE-2026-2100 made public?
CVE-2026-2100 was made public on February 6, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on March 26, 2026. EchelonGraph's copy of the record carries a last-modified date of October 29, 2026; the record at its source may have been updated since.
Is CVE-2026-2100 actively exploited?
CVE-2026-2100 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.3% probability of exploitation in the next 30 days (70th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-2100?
CVE-2026-2100 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-2100?
A fix for CVE-2026-2100 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-2100 are linked in the Vendor Advisories panel on this page.

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