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CVE-2021-47668

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CVE-2021-47668

Published: Apr 17, 2025

Modified: May 11, 2026

PUBLISHED

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.

VendorProductVersions

Linux

Linux

affected
39549eef3587f1c1e8c65c88a2400d10fd30ea17 - < 260925a0b7d2da5449f8ecfd02c1405e0c8a45b8
affected
39549eef3587f1c1e8c65c88a2400d10fd30ea17 - < bbc6847b9b8978b520f62fbc7c68c54ef0f8d282
affected
39549eef3587f1c1e8c65c88a2400d10fd30ea17 - < 92668d28c7e6a7a2ba07df287669ffcdf650c421
affected
39549eef3587f1c1e8c65c88a2400d10fd30ea17 - < 08ab951787098ae0b6c0364aeea7a8138226f234
affected
39549eef3587f1c1e8c65c88a2400d10fd30ea17 - < ac48ef15826e83f4206c47add61072e8fc76d328

+2 more versions

Linux

Linux

affected
2.6.31
unaffected
0 - < 2.6.31
unaffected
4.4.254 - <= 4.4.*
unaffected
4.9.254 - <= 4.9.*
unaffected
4.14.218 - <= 4.14.*

+4 more versions

References

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