CVE-2023-53786
Published Dec 9, 2025
Modified Apr 15, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: dm flakey: fix a crash with invalid table line This command will crash with NULL pointer dereference: dmsetup create flakey --table \ "0 `blockdev --getsize /dev/ram0` flakey /dev/ram0 0 0 1 2 corrupt_bio_byte 512" Fix the crash by checking if arg_name is non-NULL before comparing it.
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References
Other References
https://git.kernel.org/stable/c/12849ed107c0b2869fb775c81208050899006f07
https://git.kernel.org/stable/c/337b7af273562b73c46ef77a724604ad139ca762
https://git.kernel.org/stable/c/8258d84a7917aeece773716518deadb7ad776cb7
https://git.kernel.org/stable/c/83b4e3d878ea6be9aec1d5a1ab177c766c64d1a0
https://git.kernel.org/stable/c/98dba02d9a93eec11bffbb93c7c51624290702d2
https://git.kernel.org/stable/c/a1e3fffe02e05c05357af91364ac0fc1ed425b5b
https://git.kernel.org/stable/c/cb874a190f3f7c3c3fa5b979bee7a3b8cc3a19cc
https://git.kernel.org/stable/c/f76fcb9d43ec014ac4a1bb983768696d5b032df9
https://git.kernel.org/stable/c/f95cb1526669ccdf7eb12eefd57a893953e3595f
Frequently Asked Questions
What is CVE-2023-53786? +
In the Linux kernel, the following vulnerability has been resolved:
dm flakey: fix a crash with invalid table line
This command will crash with NULL pointer dereference:
dmsetup create flakey --table \
"0 `blockdev --getsize /dev/ram0` flakey /dev/ram0 0 0 1 2 corrupt_bio_byte 512"
Fix the crash by checking if arg_name is non-NULL before comparing it.
How do I check if I'm vulnerable to CVE-2023-53786? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.