Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV L L L N U H H H 7.8 .0034 26.9 —
AFFECTED Product Versions Fixed Linux b21d18b51b31a24d17f883b678432fbdee3d5675 – — Linux 2.6.37 – 4.4.295
TIMELINE May 24 Reserved by Linux May 24 Published (CNA: Linux) Aug 4 RESCORED — CVE-2021-47520 (Linux). CVSS 8.8 → 7.8 (NVD).
In the Linux kernel, the following vulnerability has been resolved: can: pch_can: pch_can_rx_normal: fix use after free After calling netif_receive_skb(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is dereferenced just after the call netif_receive_skb(skb). Reordering the lines solves the issue.
| Date | Event | Detail |
|---|---|---|
| May 24, 2024 | Reserved | Reserved by Linux |
| May 24, 2024 | Published | Published (CNA: Linux) |
| August 4, 2026 | RESCORED | RESCORED — CVE-2021-47520 (Linux). CVSS 8.8 → 7.8 (NVD). |
Authoritative record: CVE-2021-47520 at cve.org
Vendors: linux
Weaknesses: CWE-416
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-47520 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.