KEYS: fix overflow in keyctl_pkey_params_get_2()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63824
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 12:16:55 UTC
Updated2026-07-20 15:16:49 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001650000 probability, percentile 0.060810000 (date 2026-07-20)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 00d60fd3b93219ea854220f0fd264b86398cbc53 622ec2dcd59f21623f2a7ab773c80ceb7d555e3a git Not specified
CNA Linux Linux affected 00d60fd3b93219ea854220f0fd264b86398cbc53 b1e247338bc71826a2d2def3e0874c34749df69a git Not specified
CNA Linux Linux affected 00d60fd3b93219ea854220f0fd264b86398cbc53 0f3058d7d26f81df9b68a18ddbe164bdc3c5eff3 git Not specified
CNA Linux Linux affected 00d60fd3b93219ea854220f0fd264b86398cbc53 5966e4e2ba213ab7ad559166152eb4f1f170dd2c git Not specified
CNA Linux Linux affected 00d60fd3b93219ea854220f0fd264b86398cbc53 5165f1cc727f1322456735df212d8e26ec237a8d git Not specified
CNA Linux Linux affected 00d60fd3b93219ea854220f0fd264b86398cbc53 b11c1fa32667692a2c0566e10163758e786e430c git Not specified
CNA Linux Linux affected 00d60fd3b93219ea854220f0fd264b86398cbc53 670fc6a311ed321522b7fff92cf0fc376b4f6e78 git Not specified
CNA Linux Linux affected 00d60fd3b93219ea854220f0fd264b86398cbc53 cb481e59ea6cae3b7796ac1d7a22b6b24c3f3c0b git Not specified
CNA Linux Linux affected 4.20 Not specified
CNA Linux Linux unaffected 4.20 semver Not specified
CNA Linux Linux unaffected 5.10.260 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.211 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.177 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.144 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.95 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.38 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.3 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/670fc6a311ed321522b7fff92cf0fc376b4f6e78 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b11c1fa32667692a2c0566e10163758e786e430c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cb481e59ea6cae3b7796ac1d7a22b6b24c3f3c0b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5165f1cc727f1322456735df212d8e26ec237a8d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5966e4e2ba213ab7ad559166152eb4f1f170dd2c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0f3058d7d26f81df9b68a18ddbe164bdc3c5eff3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/622ec2dcd59f21623f2a7ab773c80ceb7d555e3a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b1e247338bc71826a2d2def3e0874c34749df69a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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