Bug 2360787 (CVE-2021-47669) - CVE-2021-47669 kernel: can: vxcan: vxcan_xmit: fix use after free bug
Summary: CVE-2021-47669 kernel: can: vxcan: vxcan_xmit: fix use after free bug
Keywords:
Status: NEW
Alias: CVE-2021-47669
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-04-17 19:01 UTC by OSIDB Bzimport
Modified: 2025-04-18 14:38 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2025-04-17 19:01:53 UTC 
In the Linux kernel, the following vulnerability has been resolved:

can: vxcan: vxcan_xmit: fix use after free bug

After calling netif_rx_ni(skb), dereferencing skb is unsafe.
Especially, the canfd_frame cfd which aliases skb memory is accessed
after the netif_rx_ni().
Comment 1 Avinash Hanwate 2025-04-18 03:43:29 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025041734-CVE-2021-47669-f268@gregkh/T
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