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CVE Vulnerability Details :
CVE-2026-48066
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-27 May, 2026 | 19:57
Updated At-28 May, 2026 | 12:54
Rejected At-
▼CVE Numbering Authority (CNA)
pam_usb: Thread-unsafe static pointer in log.c causes data race under concurrent PAM authentication

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.1, src/log.c contains a process-wide static pointer that is written on every PAM invocation with the address of a stack-local variable. This violates the PAM re-entrancy requirement and creates a data race when the PAM stack is invoked concurrently from multiple threads. This vulnerability is fixed in 0.9.1.

Affected Products
Vendor
mcdope
Product
pam_usb
Versions
Affected
  • < 0.9.1
Problem Types
TypeCWE IDDescription
CWECWE-362CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWECWE-476CWE-476: NULL Pointer Dereference
Type: CWE
CWE ID: CWE-362
Description: CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Type: CWE
CWE ID: CWE-476
Description: CWE-476: NULL Pointer Dereference
Metrics
VersionBase scoreBase severityVector
3.15.7MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Version: 3.1
Base score: 5.7
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/mcdope/pam_usb/security/advisories/GHSA-qg76-57wq-mpv6
x_refsource_CONFIRM
https://github.com/mcdope/pam_usb/issues/350
x_refsource_MISC
https://github.com/mcdope/pam_usb/issues/55
x_refsource_MISC
Hyperlink: https://github.com/mcdope/pam_usb/security/advisories/GHSA-qg76-57wq-mpv6
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/mcdope/pam_usb/issues/350
Resource:
x_refsource_MISC
Hyperlink: https://github.com/mcdope/pam_usb/issues/55
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Details not found