Bug 1992779 (CVE-2021-38206) - CVE-2021-38206 kernel: NULL pointer dereference in the radiotap parser by injecting a frame with 802.11a rates in mac80211 subsystem
Summary: CVE-2021-38206 kernel: NULL pointer dereference in the radiotap parser by inj...
Keywords:
Status: NEW
Alias: CVE-2021-38206
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
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Depends On: 1992781 Red Hat1993201 Red Hat1993202 Red Hat1993203
Blocks: Embargoed1992782
TreeView+ depends on / blocked
 
Reported: 2021-08-11 18:03 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-04-01 08:44 UTC (History)
35 users (show)

Fixed In Version: Linux kernel 5.13-rc7
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found on the Linux kernel. A NULL pointer dereference in the radiotap parser, leading to a denial of service, can occur in the mac80211 subsystem when a device supports only 5 GHz is used and frames with 802.11a rates are injected. The highest threat from this vulnerability is to system availability.
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Description Guilherme de Almeida Suckevicz 2021-08-11 18:03:34 UTC 
The mac80211 subsystem in the Linux kernel before 5.12.13, when a device supporting only 5 GHz is used, allows attackers to cause a denial of service (NULL pointer dereference in the radiotap parser) by injecting a frame with 802.11a rates.

Reference and upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bddc0c411a45d3718ac535a070f349be8eca8d48
Comment 1 Guilherme de Almeida Suckevicz 2021-08-11 18:04:02 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1992781]
Comment 2 Justin M. Forbes 2021-08-12 13:29:40 UTC 
This was fixed for Fedora with the 5.12.13 stable kernel updates.
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