What’s Vulnerable › Vulnerabilities

CVE-2020-25211

• Severity: medium (CVSS 6.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-09-09 · updated 2026-06-17
• Weakness: CWE-120

Description

In the Linux kernel through 5.8.7, local attackers able to inject conntrack netlink configuration could overflow a local buffer, causing crashes or triggering use of incorrect protocol numbers in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c, aka CID-1cc5ef91d2ff.

Affected products

• Debian Linux: 9.0, 10.0
• Fedoraproject Fedora: 31, 32
• Linux kernel: through 5.8.7

References

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1cc5ef91d2ff94d2bf2de3b3585423e8a1051cb6
• https://lists.debian.org/debian-lts-announce/2020/10/msg00028.html
• https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html
• https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BL2O4JAMPJG4YMLLJ7JFDHDJRXN4RKTC/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OLDYVOM4OS55HA45Y3UEVLDHYGFXPZUX/
• https://security.netapp.com/advisory/ntap-20201009-0001/
• https://twitter.com/grsecurity/status/1303646421158109185
• https://www.debian.org/security/2020/dsa-4774
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1cc5ef91d2ff94d2bf2de3b3585423e8a1051cb6
• https://lists.debian.org/debian-lts-announce/2020/10/msg00028.html
• https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html

Get alerted when CVE-2020-25211 or the next vulnerability affects your stack