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CVE-2026-47269

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, pam_usb's deny_remote feature checks utmpx ut_addr_v6 to detect whether an authentication request originates from a remote session. The outer guard was if (utent->ut_addr_v6[0] != 0), which only tests the first 32-bit word of the 128-bit address field. IPv4-mapped IPv6 addresses (::ffff:x.x.x.x) store the IPv4 address in ut_addr_v6[3] with ut_addr_v6[0] == 0. On systems where the SSH daemon listen
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2e45effa5acbb9bd87f9a92b1c870c7363b9f531c33ecc4ca9b10b631cd48fa3
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"pam_usb","vendor":"mcdope","versions":[{"status":"affected","version":"< 0.9.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c387d208205de5261f3e7e45a2fbc0819130d5d79d75f716f6f4b89284c6027c · sha256:ff2c6573d38cfacc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c387d208205de5261f3e7e45a2fbc0819130d5d79d75f716f6f4b89284c6027c · sha256:ff2c6573d38cfacc… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c387d208205de5261f3e7e45a2fbc0819130d5d79d75f716f6f4b89284c6027c · sha256:ff2c6573d38cfacc… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/mcdope/pam_usb/commit/804fe24eae3d742d8be05fd015e36abc3c7d94e5","tags":["x_refsource_MISC"],"url":"https://github.com/mcdope/pam_usb/commit/804fe24eae3d742d8be05fd015e36abc3c7d94e5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c387d208205de5261f3e7e45a2fbc0819130d5d79d75f716f6f4b89284c6027c · sha256:ff2c6573d38cfacc… · /containers/cna/references/1
{"name":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-jmmj-qhrq-w45g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-jmmj-qhrq-w45g"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c387d208205de5261f3e7e45a2fbc0819130d5d79d75f716f6f4b89284c6027c · sha256:ff2c6573d38cfacc… · /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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