Research / Finding
upb: add bounds check to LocalizeRadix()
F-PROTOBUF-UPB-STRTOF-LOCALE-OVERFLOW-001
Public snapshot: 26 Sep 2026. Status, releases and attribution belong to each source below; none is inferred from another record.
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Recorded evidence
—score not recorded
upb: add bounds check to LocalizeRadix()
fixed publicly
details
- Finding IDs
- F-PROTOBUF-UPB-STRTOF-LOCALE-OVERFLOW-001
- Status
- fixed publicly
- Reported via
- security contact
- Note
- public fix commit 880f66e17234 on 2026-03-23. commit message states: closes a memory corruption vulnerability. release v34.1 from 2026-03-19 still predates the fix.
F-PROTOBUF-UPB-STRTOF-LOCALE-OVERFLOW-001: Memory safety. Locale-dependent numeric conversion overflows its destination buffer. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.
Mechanism source for F-PROTOBUF-UPB-STRTOF-LOCALE-OVERFLOW-001
Security area (1seal assessment): Memory safety. Locale radix conversion receives explicit output-buffer bounds instead of unchecked copying. Reviewed 21 Sep 2026.
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