UBUNTU-CVE-2021-20177

Details

A flaw was found in the Linux kernel's implementation of string matching within a packet. A privileged user (with root or CAP_NET_ADMIN) when inserting iptables rules could insert a rule which can panic the system. Kernel before kernel 5.5-rc1 is affected.

Affected Packages(204 packages)

linux

Ubuntu 25.04

Fixed in:

6.11.0-8.8

linux

Ubuntu 18.04 LTS

Fixed in:

4.13.0-16.19

linux

Ubuntu 24.04 LTS

Fixed in:

6.5.0-9.9

linux

Ubuntu 20.04 LTS

Affected versions:

5.3.0-18.195.3.0-24.265.4.0-18.225.4.0-21.255.4.0-24.285.4.0-25.295.4.0-26.305.4.0-28.325.4.0-29.335.4.0-31.35+20 more

Fixed in:

5.4.0-66.74

linux

Ubuntu 16.04 LTS

Affected versions:

4.2.0-16.194.2.0-17.214.2.0-19.234.3.0-1.104.3.0-2.114.3.0-5.164.3.0-6.174.3.0-7.18

Fixed in:

4.4.0-2.16

linux

Ubuntu 22.04 LTS

Fixed in:

5.13.0-19.19

linux

Ubuntu 14.04 LTS

Fixed in:

3.11.0-12.19

linux-aws

Ubuntu 22.04 LTS

Fixed in:

5.13.0-1005.6

linux-aws

Ubuntu 16.04 LTS

Fixed in:

4.4.0-1001.10

linux-aws

Ubuntu 14.04 LTS

Fixed in:

4.4.0-1002.2

References

REPORThttps://bugzilla.kernel.org/show_bug.cgi?id=209823 REPORThttps://ubuntu.com/security/CVE-2021-20177 ADVISORYhttps://ubuntu.com/security/notices/USN-4750-1 REPORThttps://www.cve.org/CVERecord?id=CVE-2021-20177

UBUNTU-CVE-2021-20177

Details

Affected Packages(204 packages)

References

CVSS Analysis

Upstream

Related

Ecosystems(29)

Timeline