CVE Explorer

CVE-2026-44713

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.8.7, src/tmux.c reads the user's $TMUX environment variable, splits it on commas, and interpolates the socket-path component directly into a shell command passed to popen(). Because the value is placed inside double-quotes without sanitisation, any value containing " terminates the quoted string and injects arbitrary shell syntax. popen() runs as root inside the PAM stack. This vulnerability is fixed in

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c6936a7c596849ff317fc039ce74e79376fdb1ecda38e584353052d63ce3eec8

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-78","description":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:53134a851889ad1467b37f096310753be97689bd438f87884a65a8e2d673e08b · sha256:eb7217986392478c… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:53134a851889ad1467b37f096310753be97689bd438f87884a65a8e2d673e08b · sha256:eb7217986392478c… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"pam_usb","vendor":"mcdope","versions":[{"status":"affected","version":"< 0.8.7"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:53134a851889ad1467b37f096310753be97689bd438f87884a65a8e2d673e08b · sha256:eb7217986392478c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:53134a851889ad1467b37f096310753be97689bd438f87884a65a8e2d673e08b · sha256:eb7217986392478c… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-78","description":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:53134a851889ad1467b37f096310753be97689bd438f87884a65a8e2d673e08b · sha256:eb7217986392478c… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-116","description":"CWE-116: Improper Encoding or Escaping of Output","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:53134a851889ad1467b37f096310753be97689bd438f87884a65a8e2d673e08b · sha256:eb7217986392478c… · /containers/cna/problemTypes/1/descriptions/0

Source references

1 source assertion

{"name":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-822m-whrh-vrj8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-822m-whrh-vrj8"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:53134a851889ad1467b37f096310753be97689bd438f87884a65a8e2d673e08b · sha256:eb7217986392478c… · /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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