cve.bz

CVE-2021-36357

9.8 criticalEPSS 1.2%

Critical (9.8) in openpowerfoundation skiboot. EPSS 1.2% chance of exploitation in the next 30 days.

An issue was discovered in OpenPOWER 2.6 firmware. unpack_timestamp() calls le32_to_cpu() for endian conversion of a uint16_t "year" value, resulting in a type mismatch that can truncate a higher integer value to a smaller one, and bypass a timestamp check. The fix is to use the right endian conversion function.

Severity

CVSS 3.1

9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
1.2% chance of exploitation in the next 30 days; higher than 67% of CVEs (scores of 2026-10-31)
CWE
CWE-681
Published
Modified
Record from
the NVD, synced

Affected

References

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