What’s Vulnerable › Vulnerabilities

CVE-2021-29266

• 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: 2021-03-26 · updated 2026-06-17
• Weakness: CWE-416

Description

An issue was discovered in the Linux kernel before 5.11.9. drivers/vhost/vdpa.c has a use-after-free because v->config_ctx has an invalid value upon re-opening a character device, aka CID-f6bbf0010ba0.

Affected products

• Linux kernel: from 5.8 before 5.10.26; from 5.11 before 5.11.9 — fixed in 5.10.26, 5.11.9

How to fix

Upgrade to a fixed version: Linux kernel 5.10.26, 5.11.9. Check the vendor advisory for mitigations.

References

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.9
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f6bbf0010ba004f5e90c7aefdebc0ee4bd3283b9
• https://security.netapp.com/advisory/ntap-20210513-0005/
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.9
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f6bbf0010ba004f5e90c7aefdebc0ee4bd3283b9
• https://security.netapp.com/advisory/ntap-20210513-0005/

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