CVEvulnerability
CVE-2020-36694
6.7 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2023-05-21
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.7 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 6.7 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-416
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.
Affected configurations
• linux linux kernel (< 5.10)
Related
Weakness · CWE (1)
- CWE-416 Use After Free weakness
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10 Release Notes
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12 Release Notes
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc00bcaa589914096edef7fb87ca5cee4a166b5c Mailing List, Patch
- https://security.netapp.com/advisory/ntap-20230622-0005/ security.netapp.com
- https://syzkaller.appspot.com/bug?id=0c4fd9c6aa04ec116d01e915d3b186f71a212cb2 Exploit, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10 Release Notes
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12 Release Notes
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc00bcaa589914096edef7fb87ca5cee4a166b5c Mailing List, Patch
- https://security.netapp.com/advisory/ntap-20230622-0005/ security.netapp.com
- https://syzkaller.appspot.com/bug?id=0c4fd9c6aa04ec116d01e915d3b186f71a212cb2 Exploit, Third Party Advisory