What’s Vulnerable › Vulnerabilities

CVE-2021-28950

• Severity: medium (CVSS 5.5 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: none known
• Published: 2021-03-20 · updated 2026-06-17
• Weakness: CWE-834

Description

An issue was discovered in fs/fuse/fuse_i.h in the Linux kernel before 5.11.8. A "stall on CPU" can occur because a retry loop continually finds the same bad inode, aka CID-775c5033a0d1.

Affected products

• Debian Linux: 9.0
• Fedoraproject Fedora: 33, 34
• Linux kernel: before 5.11.8 — fixed in 5.11.8

How to fix

Upgrade to a fixed version: Linux kernel 5.11.8. Check the vendor advisory for mitigations.

References

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.8
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=775c5033a0d164622d9d10dd0f0a5531639ed3ed
• https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
• https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FB6LUXPEIRLZH32YXWZVEZAD4ZL6SDK2/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRTPQE73ANG7D6M4L4PK5ZQDPO4Y2FVD/
• https://www.debian.org/security/2022/dsa-5096
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.8
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=775c5033a0d164622d9d10dd0f0a5531639ed3ed
• https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
• https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FB6LUXPEIRLZH32YXWZVEZAD4ZL6SDK2/

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