vulnerability
Ubuntu: (CVE-2021-47668): linux vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:L/AC:L/Au:S/C:C/I:C/A:C) | Apr 17, 2025 | May 6, 2025 | Jun 12, 2025 |
Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
Apr 17, 2025
Added
May 6, 2025
Modified
Jun 12, 2025
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.
Solution(s)
ubuntu-upgrade-linuxubuntu-upgrade-linux-awsubuntu-upgrade-linux-aws-5-4ubuntu-upgrade-linux-aws-fipsubuntu-upgrade-linux-aws-hweubuntu-upgrade-linux-azureubuntu-upgrade-linux-azure-4-15ubuntu-upgrade-linux-azure-5-4ubuntu-upgrade-linux-azure-fipsubuntu-upgrade-linux-fipsubuntu-upgrade-linux-gcpubuntu-upgrade-linux-gcp-4-15ubuntu-upgrade-linux-gcp-5-4ubuntu-upgrade-linux-gcp-fipsubuntu-upgrade-linux-hweubuntu-upgrade-linux-hwe-5-4ubuntu-upgrade-linux-kvmubuntu-upgrade-linux-lts-xenialubuntu-upgrade-linux-oracleubuntu-upgrade-linux-oracle-5-4ubuntu-upgrade-linux-raspiubuntu-upgrade-linux-raspi-5-4
References
- CVE-2021-47668
- https://attackerkb.com/topics/CVE-2021-47668
- URL-https://git.kernel.org/linus/03f16c5075b22c8902d2af739969e878b0879c94
- URL-https://git.kernel.org/stable/c/03f16c5075b22c8902d2af739969e878b0879c94
- URL-https://git.kernel.org/stable/c/08ab951787098ae0b6c0364aeea7a8138226f234
- URL-https://git.kernel.org/stable/c/260925a0b7d2da5449f8ecfd02c1405e0c8a45b8
- URL-https://git.kernel.org/stable/c/593c072b7b3c4d7044416eb039d9ad706bedd67a
- URL-https://git.kernel.org/stable/c/92668d28c7e6a7a2ba07df287669ffcdf650c421
- URL-https://git.kernel.org/stable/c/ac48ef15826e83f4206c47add61072e8fc76d328
- URL-https://git.kernel.org/stable/c/bbc6847b9b8978b520f62fbc7c68c54ef0f8d282
- URL-https://www.cve.org/CVERecord?id=CVE-2021-47668
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