Bug 1992774 (CVE-2021-38205) - CVE-2021-38205 kernel: drivers/net/ethernet/xilinx/xilinx_emaclite.c prints the real IOMEM pointer
Summary: CVE-2021-38205 kernel: drivers/net/ethernet/xilinx/xilinx_emaclite.c prints t...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2021-38205
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: 1992776
Blocks: 1992775
TreeView+ depends on / blocked
 
Reported: 2021-08-11 17:52 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-08-16 13:28 UTC (History)
44 users (show)

Fixed In Version: kernel 5.14-rc1
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel that allows attackers to defeat an ASLR protection mechanism because it prints a kernel pointer (i.e., the real IOMEM pointer). The highest threat from this vulnerability is to confidentiality.
Clone Of:
Environment:
Last Closed: 2021-08-16 13:28:45 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2021-08-11 17:52:02 UTC 
A flaw in the Linux kernels XILINX driver leaked a kernel pointer to userspace allowing an attacker to use this a part of reconnaissance to defeat kernel level protections.

Reference and upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d0d62baa7f505bd4c59cd169692ff07ec49dde37
Comment 1 Guilherme de Almeida Suckevicz 2021-08-11 17:53:08 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1992776]
Comment 2 Justin M. Forbes 2021-08-12 13:27:26 UTC 
This was fixed for Fedora with the 5.13.4 stable kernel updates.
Comment 6 juneau 2021-08-16 12:44:43 UTC 
Marking services notaffected per kernel analysis.
Comment 7 Product Security DevOps Team 2021-08-16 13:28:45 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-2021-38205
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