PT-2020-1812 · Linux+5 · Linux Kernel+5
Jordy Zomer
·
Published
2020-02-24
·
Updated
2022-10-29
·
CVE-2020-9383
CVSS v3.1
7.1
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions 3.16 through 5.5.6
Description
An issue in the Linux kernel leads to an out-of-bounds read because the FDC index is not checked for errors before assigning it. This issue is related to the
set fdc function in drivers/block/floppy.c. Additionally, there is a buffer overflow issue in the rwsem down write slowpath function in kernel/locking/rwsem.c, which can allow an attacker to disclose protected information or cause a denial of service.Recommendations
For Linux kernel versions 3.16 through 5.5.6, consider disabling the
set fdc function in drivers/block/floppy.c as a temporary workaround until a patch is available. Restrict access to the rwsem down write slowpath function in kernel/locking/rwsem.c to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Linux Kernel
Red Hat
Suse
Ubuntu