What’s Vulnerable › Vulnerabilities

CVE-2021-38208

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-08 · updated 2026-06-17
• Weakness: CWE-476

Description

net/nfc/llcp_sock.c in the Linux kernel before 5.12.10 allows local unprivileged users to cause a denial of service (NULL pointer dereference and BUG) by making a getsockname call after a certain type of failure of a bind call.

Affected products

• Linux kernel: before 5.12.10 — fixed in 5.12.10

How to fix

Upgrade to a fixed version: Linux kernel 5.12.10. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2021/08/17/1
• http://www.openwall.com/lists/oss-security/2021/08/17/2
• http://www.openwall.com/lists/oss-security/2021/08/24/2
• https://bugzilla.redhat.com/show_bug.cgi?id=1992810
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
• https://github.com/torvalds/linux/commit/4ac06a1e013cf5fdd963317ffd3b968560f33bba
• http://www.openwall.com/lists/oss-security/2021/08/17/1
• http://www.openwall.com/lists/oss-security/2021/08/17/2
• http://www.openwall.com/lists/oss-security/2021/08/24/2
• https://bugzilla.redhat.com/show_bug.cgi?id=1992810
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
• https://github.com/torvalds/linux/commit/4ac06a1e013cf5fdd963317ffd3b968560f33bba

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