CVE-2021-22555
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
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EPSS — probability of exploitation (30 days)
78.7%
99.6th percentile
CISA KEV
Listed
Added 2025-10-06 · patch by 2025-10-27
Weakness / dates
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Published — · modified —
Timeline
- 2025-10-06 — Added to CISA KEV (actively exploited)
- 2025-10-27 — CISA patch-by deadline
Description
Linux Kernel contains a heap out-of-bounds write vulnerability that could allow an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space.