CVE-2026-54411
6.9
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/AU:N/V:D
Summary
Linux-PAM through 1.7.2 contains an observable timing discrepancy (CWE-208) in the pam_userdb module's plaintext-password comparison path in modules/pam_userdb/pam_userdb.c that allows a local or network-adjacent attacker able to repeatedly drive authentication through a calling service to recover the plaintext password of a target account by measuring response-timing differences.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux-PAM | Linux-PAM | 0 <= 1.7.2 | affected |
Weaknesses
- CWE-208: CWE-208 Observable Timing Discrepancy
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://github.com/linux-pam/linux-pam
- https://github.com/linux-pam/linux-pam/blob/master/modules/pam_userdb/pam_userdb.c#L327
- https://github.com/linux-pam/linux-pam/blob/master/libpam/include/pam_inline.h
- https://cwe.mitre.org/data/definitions/208.html
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.