What’s Vulnerable › Vulnerabilities

CVE-2023-45898

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-10-16 · updated 2026-10-15
• Weakness: CWE-416

Description

The Linux kernel before 6.5.4 has an es1 use-after-free in fs/ext4/extents_status.c, related to ext4_es_insert_extent.

Affected products

• Linux kernel: from 6.5 before 6.5.4 — fixed in 6.5.4

How to fix

Upgrade to a fixed version: Linux kernel 6.5.4. Check the vendor advisory for mitigations.

References

• https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.4
• https://github.com/torvalds/linux/commit/768d612f79822d30a1e7d132a4d4b05337ce42ec
• https://lkml.org/lkml/2023/8/13/477
• https://lore.kernel.org/lkml/aa03f191-445c-0d2e-d6d7-0a3208d7df7a%40huawei.com/T/
• https://www.spinics.net/lists/stable-commits/msg317086.html
• https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.4
• https://github.com/torvalds/linux/commit/768d612f79822d30a1e7d132a4d4b05337ce42ec
• https://lkml.org/lkml/2023/8/13/477
• https://lore.kernel.org/lkml/aa03f191-445c-0d2e-d6d7-0a3208d7df7a%40huawei.com/T/
• https://www.spinics.net/lists/stable-commits/msg317086.html
• https://cert-portal.siemens.com/productcert/html/ssa-265688.html
• https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Get alerted when CVE-2023-45898 or the next vulnerability affects your stack