Race Condition Affecting kernel package, versions <0:4.14.219-161.340.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNEL-1694469
- published 27 Sep 2021
- disclosed 1 Feb 2021
How to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.219-161.340.amzn2 or higher.
This issue was patched in ALAS2-2021-1600.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
nbd_add_socket in drivers/block/nbd.c in the Linux kernel through 5.10.12 has an ndb_queue_rq use-after-free that could be triggered by local attackers (with access to the nbd device) via an I/O request at a certain point during device setup, aka CID-b98e762e3d71.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3348
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b98e762e3d71e893b221f871825dc64694cfb258
- https://www.openwall.com/lists/oss-security/2021/01/28/3
- https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html
- http://www.openwall.com/lists/oss-security/2021/02/01/1