What is CVE-2023-45863?

CVE-2023-45863 is a medium-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 6.4/10. Published 2023-10-14.

How severe is CVE-2023-45863?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Buffer overflow in Linux Kernel

CVE-2023-45863

An issue was discovered in lib/kobject.c in the Linux kernel before 6.2.3. With root access, an attacker can trigger a race condition that results in a fill_kobj_path out-of-bounds write.

Vulnerability class: Buffer Overflow

Published 2023-10-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (18.7th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000

Affected products

Linux Kernel

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mailing List)
cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.3 (Release Notes)
lists.debian.org/debian-lts-announce/2024/01/msg00004.html (mailing-list)
lists.debian.org/debian-lts-announce/2024/01/msg00005.html (mailing-list)

Frequently asked questions

What is CVE-2023-45863?: CVE-2023-45863 is a medium-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 6.4/10. Published 2023-10-14.
How severe is CVE-2023-45863?: Medium severity. CVSS v3 base score is 6.4 out of 10.