What’s Vulnerable › Vulnerabilities

CVE-2020-29372

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-11-28 · updated 2026-06-17
• Weakness: CWE-362

Description

An issue was discovered in do_madvise in mm/madvise.c in the Linux kernel before 5.6.8. There is a race condition between coredump operations and the IORING_OP_MADVISE implementation, aka CID-bc0c4d1e176e.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04, 20.04
• Linux kernel: before 5.6.8 — fixed in 5.6.8

How to fix

Upgrade to a fixed version: Linux kernel 5.6.8. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
• https://bugs.chromium.org/p/project-zero/issues/detail?id=2029
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.8
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0c4d1e176eeb614dc8734fc3ace34292771f11
• http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
• https://bugs.chromium.org/p/project-zero/issues/detail?id=2029
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.6.8
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bc0c4d1e176eeb614dc8734fc3ace34292771f11
• https://project-zero.issues.chromium.org/issues/42451131

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