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CVE-2026-48066

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b033a5b8ef62c2fab26811cf6e9021ca97bc095529d3d81eca599085f9968e62
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-362","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:35f9723950074e584c094d8fc3b1e1a8210521875401f58849cdb83f1a2d406b · sha256:292723e27351c30b… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-476","description":"CWE-476: NULL Pointer Dereference","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:35f9723950074e584c094d8fc3b1e1a8210521875401f58849cdb83f1a2d406b · sha256:292723e27351c30b… · /containers/cna/problemTypes/1/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:v2:35f9723950074e584c094d8fc3b1e1a8210521875401f58849cdb83f1a2d406b · sha256:292723e27351c30b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.7,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:35f9723950074e584c094d8fc3b1e1a8210521875401f58849cdb83f1a2d406b · sha256:292723e27351c30b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-362","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:35f9723950074e584c094d8fc3b1e1a8210521875401f58849cdb83f1a2d406b · sha256:292723e27351c30b… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-476","description":"CWE-476: NULL Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:35f9723950074e584c094d8fc3b1e1a8210521875401f58849cdb83f1a2d406b · sha256:292723e27351c30b… · /containers/cna/problemTypes/1/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/mcdope/pam_usb/issues/350","tags":["x_refsource_MISC"],"url":"https://github.com/mcdope/pam_usb/issues/350"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:35f9723950074e584c094d8fc3b1e1a8210521875401f58849cdb83f1a2d406b · sha256:292723e27351c30b… · /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:v2:35f9723950074e584c094d8fc3b1e1a8210521875401f58849cdb83f1a2d406b · sha256:292723e27351c30b… · /containers/cna/references/2
{"name":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-qg76-57wq-mpv6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-qg76-57wq-mpv6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:35f9723950074e584c094d8fc3b1e1a8210521875401f58849cdb83f1a2d406b · sha256:292723e27351c30b… · /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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