Bug 2267943 (CVE-2021-47082) - CVE-2021-47082 kernel: tun: avoid double free in tun_free_netdev
Summary: CVE-2021-47082 kernel: tun: avoid double free in tun_free_netdev
Keywords:
Status: NEW
Alias: CVE-2021-47082
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2268185
Blocks: 2268181
TreeView+ depends on / blocked
 
Reported: 2024-03-05 16:14 UTC by Zack Miele
Modified: 2024-06-28 12:29 UTC (History)
50 users (show)

Fixed In Version: kernel 4.19.280, kernel 5.4.240, kernel 5.10.136, kernel 5.15.12, kernel 5.16
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description Zack Miele 2024-03-05 16:14:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

tun: avoid double free in tun_free_netdev

The Linux kernel CVE team has assigned CVE-2021-47082 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024030451-CVE-2021-47082-b12c@gregkh/T
Comment 1 Zack Miele 2024-03-06 14:28:11 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2268185]
Comment 3 Justin M. Forbes 2024-03-06 14:40:39 UTC 
This was fixed for Fedora with the 5.15.12 stable kernel updates.
Comment 5 Alex 2024-06-09 16:47:52 UTC 
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47082 is: CHECK	Maybe valid. Check manually. with impact LOW (that is an approximation based on flags KASAN LOCK DANGER INIT NOMEMCHK RACE  ; these flags parsed automatically based on patch data). Such automatic check happens only for Low/Moderates (and only when not from reporter, but parsing already existing CVE). Highs always checked manually (I check it myself and then we check it again in Remediation team). In rare cases some of the Moderates could be increased to High later.
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