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CVE-2026-48792

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.1, src/evdev.c silently ignores EACCES errors when opening /dev/input/event* nodes, causing pusb_has_virtual_input_device() to return 0 (no virtual devices found) even when every open() call failed due to insufficient permissions. The caller in src/local.c cannot distinguish a clean absence of virtual devices from a permission-denied scan, and acts on the false negative by continuing authentication wi
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7b4ede227a37f568cd7b373a049d25ace1f900520fdbb06c29416c512efd3301
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-693","description":"CWE-693: Protection Mechanism Failure","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0f46b4fc97e4c20b8ffacb6c5c6e889fbb88211c66bd7f2065fe8531a1cc1eaa · sha256:2f4fc25426edfb36… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-390","description":"CWE-390: Detection of Error Condition Without Action","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0f46b4fc97e4c20b8ffacb6c5c6e889fbb88211c66bd7f2065fe8531a1cc1eaa · sha256:2f4fc25426edfb36… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"pam_usb","vendor":"mcdope","versions":[{"status":"affected","version":"< 0.9.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0f46b4fc97e4c20b8ffacb6c5c6e889fbb88211c66bd7f2065fe8531a1cc1eaa · sha256:2f4fc25426edfb36… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":4.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0f46b4fc97e4c20b8ffacb6c5c6e889fbb88211c66bd7f2065fe8531a1cc1eaa · sha256:2f4fc25426edfb36… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-693","description":"CWE-693: Protection Mechanism Failure","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0f46b4fc97e4c20b8ffacb6c5c6e889fbb88211c66bd7f2065fe8531a1cc1eaa · sha256:2f4fc25426edfb36… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-390","description":"CWE-390: Detection of Error Condition Without Action","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0f46b4fc97e4c20b8ffacb6c5c6e889fbb88211c66bd7f2065fe8531a1cc1eaa · sha256:2f4fc25426edfb36… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/mcdope/pam_usb/issues/351","tags":["x_refsource_MISC"],"url":"https://github.com/mcdope/pam_usb/issues/351"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0f46b4fc97e4c20b8ffacb6c5c6e889fbb88211c66bd7f2065fe8531a1cc1eaa · sha256:2f4fc25426edfb36… · /containers/cna/references/1
{"name":"https://github.com/mcdope/pam_usb/issues/55","tags":["x_refsource_MISC"],"url":"https://github.com/mcdope/pam_usb/issues/55"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0f46b4fc97e4c20b8ffacb6c5c6e889fbb88211c66bd7f2065fe8531a1cc1eaa · sha256:2f4fc25426edfb36… · /containers/cna/references/2
{"name":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-pvrg-chgw-x42c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-pvrg-chgw-x42c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0f46b4fc97e4c20b8ffacb6c5c6e889fbb88211c66bd7f2065fe8531a1cc1eaa · sha256:2f4fc25426edfb36… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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