Bug 2134440 (CVE-2022-42719) - CVE-2022-42719 kernel: A use-after-free problem observed in multi-BSSID element when parsing
Summary: CVE-2022-42719 kernel: A use-after-free problem observed in multi-BSSID eleme...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2022-42719
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2134469
Blocks: 2133534
TreeView+ depends on / blocked
 
Reported: 2022-10-13 12:28 UTC by Rohit Keshri
Modified: 2022-11-29 19:27 UTC (History)
53 users (show)

Fixed In Version:
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A use-after-free flaw was found in ieee802_11_parse_elems_full in the net/mac80211/util.c function in the multi-BSSID element. This issue occurs while parsing in the Linux kernel.
Clone Of:
Environment:
Last Closed: 2022-11-29 19:27:26 UTC
Embargoed:

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Description Rohit Keshri 2022-10-13 12:28:51 UTC 
When we parse a multi-BSSID element, we might point some element pointers into the allocated nontransmitted_profile. However, we free this before returning, causing UAF when the relevant pointers in the parsed elements are accessed.
Comment 4 Rohit Keshri 2022-10-13 12:46:25 UTC 
There was no shipped kernel version that was seen affected by this problem.
Comment 5 Marian Rehak 2022-10-13 13:20:48 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2134469]
Comment 6 Product Security DevOps Team 2022-11-29 19:27:23 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2022-42719
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