Vulnerability Description
An issue was discovered in netfilter in the Linux kernel before 5.10. There can be a use-after-free in the packet processing context, because the per-CPU sequence count is mishandled during concurrent iptables rules replacement. This could be exploited with the CAP_NET_ADMIN capability in an unprivileged namespace. NOTE: cc00bca was reverted in 5.12.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.10 |
Related Weaknesses (CWE)
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10Release Notes
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12Release Notes
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ccMailing ListPatch
- https://security.netapp.com/advisory/ntap-20230622-0005/
- https://syzkaller.appspot.com/bug?id=0c4fd9c6aa04ec116d01e915d3b186f71a212cb2ExploitThird Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10Release Notes
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12Release Notes
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ccMailing ListPatch
- https://security.netapp.com/advisory/ntap-20230622-0005/
- https://syzkaller.appspot.com/bug?id=0c4fd9c6aa04ec116d01e915d3b186f71a212cb2ExploitThird Party Advisory
FAQ
What is CVE-2020-36694?
CVE-2020-36694 is a vulnerability with a CVSS score of 6.7 (MEDIUM). An issue was discovered in netfilter in the Linux kernel before 5.10. There can be a use-after-free in the packet processing context, because the per-CPU sequence count is mishandled during concurrent...
How severe is CVE-2020-36694?
CVE-2020-36694 has been rated MEDIUM with a CVSS base score of 6.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-36694?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.