CVE-2026-63824

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-19. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-45490 (ENISA EUVD) · GHSA-734m-rp66-35q4 (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

KEYS: fix overflow in keyctl_pkey_params_get_2()

The length for the internal output buffer is calculated incorrectly, which can result overflow when a too small buffer is provided.

Fix the bug by allocating internal output with the size of the maximum length of the cryptographic primitive instead of caller provided size.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

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)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (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.
EPSS PROB
0.2%
EPSS %ILE
6th
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 (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS. 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; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade 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; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (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

July 19, 2026

Last Modified

October 22, 2026

Advisory Details (8)

Auto-updated Jul 21, 2026
Patch available.
Web page

KEYS: fix overflow in keyctl_pkey_params_get_2() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cb481e59ea6cae3b7796ac1d7a22b6b24c3f3c0b
Web page

KEYS: fix overflow in keyctl_pkey_params_get_2() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b1e247338bc71826a2d2def3e0874c34749df69a
Web page

KEYS: fix overflow in keyctl_pkey_params_get_2() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b11c1fa32667692a2c0566e10163758e786e430c
Web page

KEYS: fix overflow in keyctl_pkey_params_get_2() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/670fc6a311ed321522b7fff92cf0fc376b4f6e78
Web page

KEYS: fix overflow in keyctl_pkey_params_get_2() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/622ec2dcd59f21623f2a7ab773c80ceb7d555e3a
Web page

KEYS: fix overflow in keyctl_pkey_params_get_2() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5966e4e2ba213ab7ad559166152eb4f1f170dd2c
Web page

KEYS: fix overflow in keyctl_pkey_params_get_2() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5165f1cc727f1322456735df212d8e26ec237a8d
Web page

KEYS: fix overflow in keyctl_pkey_params_get_2() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0f3058d7d26f81df9b68a18ddbe164bdc3c5eff3

Patch Availability(21)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-tools-ibm-7.0 (7.0.0-1013.13) @ resolute2026-10-22ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2018.18) @ resolute2026-10-22ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1114.120~20.04.1) @ focal2026-10-22ubuntu
ubuntulinux-tools-gcp-lts-22.04 (5.15.0.1118.115) @ jammy2026-10-22ubuntu
ubuntulinux-tools-oracle-edge (7.0.0-1011.11~24.04.1) @ noble2026-10-22ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-10-22ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-10-22ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1011.11) @ resolute2026-10-22ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18) @ resolute2026-10-22ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1080 (5.15.0-1080.84) @ jammy2026-10-22ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1036.39) @ noble2026-10-22ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1112.112) @ jammy2026-10-22ubuntu
ubuntulinux-virtual-6.8 (6.8.0-147.147) @ noble2026-10-22ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1071.79) @ noble2026-10-22ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-10-22ubuntu
ubuntulinux-tools-azure-edge (7.0.0-1014.14~24.04.1) @ noble2026-10-22ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1019.19) @ resolute2026-10-22ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1118.128~20.04.1) @ focal2026-10-22ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-10-22ubuntu
redhatkernel-0:6.12.0-211.51.1.el10_22026-09-04redhat
redhatkernel-0:5.14.0-687.44.1.el9_82026-09-04redhat

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 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (55 versions)
  • every version up to 5.10.262-1: fixed in 5.10.262-1
—
linux-6.16.1.106-3~deb11u1 ... 6.1.176-1~deb11u1 (21 versions)
  • every version up to 6.1.177-1~deb11u1: fixed in 6.1.177-1~deb11u1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (54 versions)
  • every version up to 6.1.177-1: fixed in 6.1.177-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.95-1~bpo12+1 (29 versions)
  • every version up to 6.12.95-1: fixed in 6.12.95-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (157 versions)
  • every version up to 7.1.3-1: fixed in 7.1.3-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(19)

Data Freshness Timeline

(refreshed 10× 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 100 of 409 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. None are among the latest 100 rows. The 309 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-10-25 14:13 UTCEG score recompute
  4. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-22 18:26 UTCEG score recompute
  7. 2026-10-22 18:26 UTCVendor advisory
  8. 2026-10-22 18:26 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  9. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-19 20:20 UTCEG score recompute
  13. 2026-10-19 20:20 UTCVendor advisory
  14. 2026-10-19 20:19 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  15. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-18 03:23 UTCEG score recompute
  18. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-16 17:23 UTCEG score recompute
  20. 2026-10-16 17:23 UTCVendor advisory
  21. 2026-10-16 17:23 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  22. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-10-16 15:56 UTCEG score recompute
  24. 2026-10-16 15:56 UTCVendor advisory
  25. 2026-10-16 15:56 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
Show 75 more
  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-10-13 11:53 UTCEG score recompute
  5. 2026-10-13 11:53 UTCVendor advisory
  6. 2026-10-13 11:52 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  7. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-12 15:48 UTCEG score recompute
  9. 2026-10-11 19:33 UTCEG score recompute
  10. 2026-10-11 16:48 UTCEG score recompute
  11. 2026-10-11 14:09 UTCEG score recompute
  12. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-10-01 09:09 UTCEG score recompute
  23. 2026-10-01 09:09 UTCVendor advisory
  24. 2026-10-01 09:09 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  27. 2026-09-28 07:41 UTCEG score recompute
  28. 2026-09-28 07:41 UTCVendor advisory
  29. 2026-09-28 07:41 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  30. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-09-24 04:18 UTCEG score recompute
  32. 2026-09-24 04:18 UTCVendor advisory
  33. 2026-09-24 04:18 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  34. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  35. 2026-09-23 02:14 UTCEG score recompute
  36. 2026-09-23 02:14 UTCVendor advisory
  37. 2026-09-23 02:14 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  38. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  39. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  40. 2026-09-18 04:26 UTCEG score recompute
  41. 2026-09-18 04:26 UTCVendor advisory
  42. 2026-09-18 04:26 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  43. 2026-09-17 10:05 UTCEG score recompute
  44. 2026-09-17 10:05 UTCVendor advisory
  45. 2026-09-17 10:05 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  46. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  47. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  48. 2026-09-14 03:23 UTCEG score recompute
  49. 2026-09-14 03:23 UTCVendor advisory
  50. 2026-09-14 03:23 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  51. 2026-09-13 16:17 UTCVendor advisory
  52. 2026-09-13 16:17 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  53. 2026-09-13 03:54 UTCEG score recompute
  54. 2026-09-13 03:54 UTCVendor advisory
  55. 2026-09-13 03:54 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  56. 2026-09-12 10:24 UTCVendor advisory
  57. 2026-09-12 10:24 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  58. 2026-09-11 20:32 UTCEG score recompute
  59. 2026-09-11 20:32 UTCVendor advisory
  60. 2026-09-11 20:31 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  61. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  62. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  63. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  64. 2026-09-07 23:44 UTCEG score recompute
  65. 2026-09-07 23:44 UTCVendor advisory
  66. 2026-09-07 23:44 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  67. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  68. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  69. 2026-09-06 13:15 UTCVendor advisory
  70. 2026-09-06 13:15 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  71. 2026-09-05 20:14 UTCEG score recompute
  72. 2026-09-05 20:14 UTCVendor advisory
  73. 2026-09-05 20:14 UTCGHSA enrichmentGHSA-734m-rp66-35q4 · GitHub severity HIGH · GitHub CVSS 7.8
  74. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  75. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile

Frequently asked(5)

What is CVE-2026-63824?
CVE-2026-63824 is a high-severity vulnerability; its CVE record was published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: KEYS: fix overflow in keyctlpkeyparamsget2() The length for the internal output buffer is calculated incorrectly, which can result overflow when a too small buffer is provided. Fix the bug by allocating internal output with the…
When was the CVE record for CVE-2026-63824 published?
The CVE record for CVE-2026-63824 was published on July 19, 2026. 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 22, 2026; the record at its source may have been updated since.
Is CVE-2026-63824 actively exploited?
CVE-2026-63824 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-63824?
CVE-2026-63824 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-63824?
A fix for CVE-2026-63824 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-63824 are linked in the Vendor Advisories panel on this page.

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