Bug 2266501 (CVE-2021-46954) - CVE-2021-46954 kernel: net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets
Summary: CVE-2021-46954 kernel: net/sched: sch_frag: fix stack OOB read while fragment...
Keywords:
Status: NEW
Alias: CVE-2021-46954
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: 2266502
Blocks: 2266459
TreeView+ depends on / blocked
 
Reported: 2024-02-27 23:50 UTC by Nick Tait
Modified: 2025-09-06 08:34 UTC (History)
47 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description Nick Tait 2024-02-27 23:50:29 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets

The Linux kernel CVE team has assigned CVE-2021-46954 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024022715-CVE-2021-46954-b856@gregkh/T/#u
Comment 1 Nick Tait 2024-02-27 23:51:08 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2266502]
Comment 6 Justin M. Forbes 2024-02-28 18:54:14 UTC 
This was fixed for Fedora with the 5.12.3 stable kernel update.
Comment 8 Alex 2024-06-09 16:16:46 UTC 
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-46954 is: CHECK	Maybe valid. Check manually. with impact LOW (that is an approximation based on flags REMOTE READ KASAN OOB INIT NETWORK SKB  ; 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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