What’s Vulnerable › Vulnerabilities

CVE-2024-0582: Kernel: io_uring: page use-after-free vulnerability via buffer ring mmap

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 12.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-16 · updated 2026-06-17
• Weakness: CWE-416

Description

A memory leak flaw was found in the Linux kernel’s io_uring functionality in how a user registers a buffer ring with IORING_REGISTER_PBUF_RING, mmap() it, and then frees it. This flaw allows a local user to crash or potentially escalate their privileges on the system.

Affected products

• Linux kernel: from 6.4 before 6.6.5; 6.7-rc1, 6.7-rc2, 6.7-rc3 — fixed in 6.6.5

How to fix

Upgrade to a fixed version: Linux kernel 6.6.5. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2024-0582
• https://bugs.chromium.org/p/project-zero/issues/detail?id=2504
• https://bugzilla.redhat.com/show_bug.cgi?id=2254050
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c392cbecd8eca4c53f2bf508731257d9d0a21c2d
• http://www.openwall.com/lists/oss-security/2024/04/24/3
• https://access.redhat.com/security/cve/CVE-2024-0582
• https://bugs.chromium.org/p/project-zero/issues/detail?id=2504
• https://bugzilla.redhat.com/show_bug.cgi?id=2254050
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c392cbecd8eca4c53f2bf508731257d9d0a21c2d

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