CVE-2021-47520
can: pch_can: pch_can_rx_normal: fix use after free
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
24 May 2024Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aahttps://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612ehttps://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458dbhttps://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d