CVEvulnerability

CVE-2021-47668

8.8 HIGH Published 2025-04-17 Modified 2026-08-04 Official page ↗
Status
Modified
Published
2025-04-17
Last modified
2026-08-04
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
8.8 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: can: dev: can_restart: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the netif_rx_ni() in: stats->rx_bytes += cf->len; Reordering the lines solves the issue.

Affected configurations

• linux linux kernel (>= 2.6.31 < 4.4.254) • linux linux kernel (>= 4.5 < 4.9.254) • linux linux kernel (>= 4.10 < 4.14.218) • linux linux kernel (>= 4.15 < 4.19.171) • linux linux kernel (>= 4.20 < 5.4.93) • linux linux kernel (>= 5.5 < 5.10.11) • linux linux kernel 5.11

Related

Weakness · CWE (1)

References