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CVE-2026-47271

pam_usb provides hardware authentication for Linux using ordinary removable media. Prior to 0.9.0, src/mem.c implemented out-of-memory guards for xmalloc(), xrealloc(), and xstrdup() using assert(data != NULL). The C standard specifies that all assert() expressions are compiled out when NDEBUG is defined at build time. NDEBUG is commonly defined in release and packaging builds (Debian, Fedora, Arch package flags all define it via -DNDEBUG in CFLAGS). With the guard removed, xmalloc/xrealloc/xstr
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:fcab51d45658e8be36f89ea9828268823c628cb3d32e9f7a82713e634b6bdccd
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:v2:67778f5aaf5ecc567918ce8951cdc1e0ea5dc6c053393b9facac5b9f6e13c9c5 · sha256:23deaadb8dd47bf7… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.1,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:67778f5aaf5ecc567918ce8951cdc1e0ea5dc6c053393b9facac5b9f6e13c9c5 · sha256:23deaadb8dd47bf7… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-476","description":"CWE-476: NULL Pointer Dereference","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:67778f5aaf5ecc567918ce8951cdc1e0ea5dc6c053393b9facac5b9f6e13c9c5 · sha256:23deaadb8dd47bf7… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/mcdope/pam_usb/commit/d003e551b794a9e3774ff4720830fb7aadaa48bd","tags":["x_refsource_MISC"],"url":"https://github.com/mcdope/pam_usb/commit/d003e551b794a9e3774ff4720830fb7aadaa48bd"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:67778f5aaf5ecc567918ce8951cdc1e0ea5dc6c053393b9facac5b9f6e13c9c5 · sha256:23deaadb8dd47bf7… · /containers/cna/references/1
{"name":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-7rvx-jcc6-7hqq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/mcdope/pam_usb/security/advisories/GHSA-7rvx-jcc6-7hqq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:67778f5aaf5ecc567918ce8951cdc1e0ea5dc6c053393b9facac5b9f6e13c9c5 · sha256:23deaadb8dd47bf7… · /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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