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 .0078 53.2 —
AFFECTED Product Versions Fixed Linux b9b17debc69d27cd55e21ee51a5ba7fc50a426cf – — Linux 4.9 – 4.9.269
TIMELINE Feb 27 Reserved by Linux Feb 28 Published (CNA: Linux) Aug 4 RESCORED — CVE-2021-47013 (Linux). CVSS 9.8 → 7.8 (NVD).
In the Linux kernel, the following vulnerability has been resolved: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..). If some error happens in emac_tx_fill_tpd(), the skb will be freed via dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd(). But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len). As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len, thus my patch assigns skb->len to 'len' before the possible free and use 'len' instead of skb->len later.
| Date | Event | Detail |
|---|---|---|
| February 27, 2024 | Reserved | Reserved by Linux |
| February 28, 2024 | Published | Published (CNA: Linux) |
| August 4, 2026 | RESCORED | RESCORED — CVE-2021-47013 (Linux). CVSS 9.8 → 7.8 (NVD). |
Authoritative record: CVE-2021-47013 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-2021-47013 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.