CVE-2026-63824 (GCVE-0-2026-63824)

Vulnerability from cvelistv5 – Published: 2026-07-19 12:02 – Updated: 2026-07-20 13:40
VLAI
Title
KEYS: fix overflow in keyctl_pkey_params_get_2()
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 00d60fd3b93219ea854220f0fd264b86398cbc53 , < 622ec2dcd59f21623f2a7ab773c80ceb7d555e3a (git)
Affected: 00d60fd3b93219ea854220f0fd264b86398cbc53 , < b1e247338bc71826a2d2def3e0874c34749df69a (git)
Affected: 00d60fd3b93219ea854220f0fd264b86398cbc53 , < 0f3058d7d26f81df9b68a18ddbe164bdc3c5eff3 (git)
Affected: 00d60fd3b93219ea854220f0fd264b86398cbc53 , < 5966e4e2ba213ab7ad559166152eb4f1f170dd2c (git)
Affected: 00d60fd3b93219ea854220f0fd264b86398cbc53 , < 5165f1cc727f1322456735df212d8e26ec237a8d (git)
Affected: 00d60fd3b93219ea854220f0fd264b86398cbc53 , < b11c1fa32667692a2c0566e10163758e786e430c (git)
Affected: 00d60fd3b93219ea854220f0fd264b86398cbc53 , < 670fc6a311ed321522b7fff92cf0fc376b4f6e78 (git)
Affected: 00d60fd3b93219ea854220f0fd264b86398cbc53 , < cb481e59ea6cae3b7796ac1d7a22b6b24c3f3c0b (git)
Create a notification for this product.
Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.10.260 , ≤ 5.10.* (semver)
Unaffected: 5.15.211 , ≤ 5.15.* (semver)
Unaffected: 6.1.177 , ≤ 6.1.* (semver)
Unaffected: 6.6.144 , ≤ 6.6.* (semver)
Unaffected: 6.12.95 , ≤ 6.12.* (semver)
Unaffected: 6.18.38 , ≤ 6.18.* (semver)
Unaffected: 7.1.3 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)
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    "dateReserved": "2026-07-19T07:54:57.014Z",
    "dateUpdated": "2026-07-20T13:40:28.600Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-20T17:23:48+00:00",
      "cve": "CVE-2026-63824",
      "id": "CVE-2026-63824",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: KEYS: fix overflow in keyctl_pkey_params_get_2()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63824.json",
      "version": "3"
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.