What is CVE-2023-53783?

CVE-2023-53783 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 5.4 onward and patched in 5.4.235, 5.10.173, 5.15.99 and others. CVE-2023-53783 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-53783?

CVE-2023-53783 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2023-53783?

Yes, CVE-2023-53783 has been patched. Fixed versions include 5.4.235, 5.10.173, 5.15.99 and others. If you are running Linux kernel 5.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-53783 actively exploited?

CVE-2023-53783 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-53783

In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calc_lcoefs() echo max of u64 to cost.model can cause divide by 0 error. # echo 8:0 rbps=18446744073709551615 > /sys/fs/cgroup/io.cost.model divide error: 0000 [#1] PREEMPT SMP RIP: 0010:calc_lcoefs+0x4c/0xc0 Call Trace: <TASK> ioc_refresh_params+0x2b3/0x4f0 ioc_cost_model_write+0x3cb/0x4c0 ? _copy_from_iter+0x6d/0x6c0 ? kernfs_fop_write_iter+0xfc/0x270 cgroup_file_write+0xa0/0x200 kernfs_fop_write_iter+0x17d/0x270 vfs_write+0x414/0x620 ksys_write+0x73/0x160 __x64_sys_write+0x1e/0x30 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd calc_lcoefs() uses the input value of cost.model in DIV_ROUND_UP_ULL, overflow would happen if bps plus IOC_PAGE_SIZE is greater than ULLONG_MAX, it can cause divide by 0 error. Fix the problem by setting basecost

Package Linux Kernel

Published 2025-12-09

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 5.4 and later are affected. Fixed in 5.4.235, 5.10.173, 5.15.99, 6.1.16, 6.2.3, 6.3 and their respective stable series.

Affected from

≥ 5.4

Fixed in

✓ 5.4.235 5.4.x ✓ 5.10.173 5.10.x ✓ 5.15.99 5.15.x ✓ 6.1.16 6.1.x ✓ 6.2.3 6.2.x ✓ 6.3

References

The following references provide additional information about CVE-2023-53783 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/3538ade9d8c2ba41088e395de916f2599fadba8f
Patch
Kernel patch commit
https://git.kernel.org/stable/c/6e291810fe83a384700eb24a1f714966391ed562
Patch
Kernel patch commit
https://git.kernel.org/stable/c/984af1e66b4126cf145153661cc24c213e2ec231
Patch

6 patch commits total View all on NVD

Frequently asked questions

What is CVE-2023-53783?

CVE-2023-53783 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.4 onward and has been patched in 5.4.235, 5.10.173, 5.15.99 and others. CVE-2023-53783 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2023-53783?

Yes — CVE-2023-53783 has been patched. Fixed versions include 5.4.235, 5.10.173, 5.15.99 and others. If you are running Linux kernel 5.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-53783 actively exploited?

No — CVE-2023-53783 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.