What is CVE-2023-26605?

CVE-2023-26605 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2023-02-26.

How severe is CVE-2023-26605?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2023-26605 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Use After Free in Linux Kernel

CVE-2023-26605

In the Linux kernel 6.0.8, there is a use-after-free in inode_cgwb_move_to_attached in fs/fs-writeback.c, related to __list_del_entry_valid.

Vulnerability class: Use-After-Free

Published 2023-02-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.7th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 28.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Linux Kernel

Weakness classification (CWE)

CWE-416 — Use After Free

Public proof-of-concept exploits

References

lkml.org/lkml/2023/2/22/3 (Exploit)
security.netapp.com/advisory/ntap-20230316-0010/ (Third Party Advisory)
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/

Frequently asked questions

What is CVE-2023-26605?: CVE-2023-26605 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2023-02-26.
How severe is CVE-2023-26605?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2023-26605 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.