Bug 1973436 (CVE-2021-32078) - CVE-2021-32078 kernel: out-of-bounds read in arch/arm/mach-footbridge/personal-pci.c due to improper input validation
Summary: CVE-2021-32078 kernel: out-of-bounds read in arch/arm/mach-footbridge/persona...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2021-32078
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1973437
Blocks: Embargoed1973438
TreeView+ depends on / blocked
 
Reported: 2021-06-17 20:05 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-06-18 14:57 UTC (History)
45 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel. An out-of-bounds read was discovered due to the lack of a check for a value that shouldn't be negative in arch/arm/mach-footbridge/personal-pci.c. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2021-06-18 05:48:17 UTC

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Description Guilherme de Almeida Suckevicz 2021-06-17 20:05:41 UTC 
An Out-of-Bounds Read was discovered in arch/arm/mach-footbridge/personal-pci.c in the Linux kernel through 5.12.11 because of the lack of a check for a value that shouldn't be negative, e.g., access to element -2 of an array.

Reference:
https://kirtikumarar.com/CVE-2021-32078.txt

Upstream patch:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=298a58e165e447ccfaae35fe9f651f9d7e15166f
Comment 1 Guilherme de Almeida Suckevicz 2021-06-17 20:06:16 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1973437]
Comment 2 Justin M. Forbes 2021-06-18 13:31:04 UTC 
Fedora does not enable ARCH_FOOTBRIDGE.
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