CVE-2026-45986: crypto: ccree - fix a memory leak in cc_mac_digest()
Published May 27, 2026
·Updated
crypto: ccree - fix a memory leak in ccmacdigest()
Affected Software
9 affected componentsFixes available
Linux Linux kernel
Linux Linux kernel>=4.17<5.10.258
Linux Linux kernel>=5.11<5.15.209
Linux Linux kernel>=5.16<6.1.175
Linux Linux kernel>=6.2<6.6.140
Linux Linux kernel>=6.7<6.12.86
Linux Linux kernel>=6.13<6.18.27
Linux Linux kernel>=6.19<7.0.4
Microsoft azl3 kernel 6.6.139.1-1<6.6.141.1-1
6.6.141.1-1
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.141.1-1
Event History
May 27, 2026
CVE Published
via MITRE·12:55 PM
Data Sourced
via MITRE·12:55 PM
Description
Data Sourced
via NVD·02:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
May 28, 2026
Data Sourced
via Microsoft·08:07 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·08:07 AM
Affected Software
Updated
via Microsoft·08:07 AM
DescriptionSeverity
Frequently Asked Questions
1
Which systems are affected?
Systems using the Linux kernel ccree crypto driver are the relevant exposure set. The issue is also identified for Microsoft azl3 kernel 6.6.139.1-1.
2
What level of access does an attacker need?
Exploitation requires local access and low privileges; no user interaction is required. The reported impact is limited confidentiality loss and availability loss.
3
How can the vulnerable condition be triggered?
The leak occurs when cc_map_hash_request_final() fails during cc_mac_digest() processing, because the result mapping was not unmapped. The fix adds cc_unmap_result() on that failure path.