Race Condition Affecting kernel-debug-modules package, versions <0:4.18.0-372.9.1.el8
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Test your applications- Snyk ID SNYK-ROCKY8-KERNELDEBUGMODULES-3193979
- published 5 Jan 2023
- disclosed 25 Mar 2022
Introduced: 25 Mar 2022
CVE-2021-4203 Open this link in a new tabHow to fix?
Upgrade Rocky-Linux:8 kernel-debug-modules to version 0:4.18.0-372.9.1.el8 or higher.
This issue was patched in RLSA-2022:1988.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules package and not the kernel-debug-modules package as distributed by Rocky-Linux.
See How to fix? for Rocky-Linux:8 relevant fixed versions and status.
A use-after-free read flaw was found in sock_getsockopt() in net/core/sock.c due to SO_PEERCRED and SO_PEERGROUPS race with listen() (and connect()) in the Linux kernel. In this flaw, an attacker with a user privileges may crash the system or leak internal kernel information.
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4203
- https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-4203.json
- https://bugs.chromium.org/p/project-zero/issues/detail?id=2230&can=7&q=modified-after%3Atoday-30&sort=-modified&colspec=ID%20Type%20Status%20Priority%20Milestone%20Owner%20Summary%20Modified%20Cve&cells=tiles&redir=1
- https://bugzilla.redhat.com/show_bug.cgi?id=2036934
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=35306eb23814
- https://lore.kernel.org/netdev/20210929225750.2548112-1-eric.dumazet@gmail.com/T/
- https://security.netapp.com/advisory/ntap-20221111-0003/
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://lore.kernel.org/netdev/20210929225750.2548112-1-eric.dumazet%40gmail.com/T/