CVE-2021-38208 : net/nfc/llcp_sock.c in the Linux kernel before 5.12.10 allows local unprivileged

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.

Published 2021-08-08 20:15:07

Updated 2021-09-21 18:23:57

Source MITRE

View at NVD, CVE.org

Vulnerability category: Memory CorruptionDenial of service

Products affected by CVE-2021-38208

Linux » Linux Kernel
Versions before (<) 5.12.10
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-38208

EPSS FAQ

0.06%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 26 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-38208

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
2.1	LOW	AV:L/AC:L/Au:N/C:N/I:N/A:P	3.9	2.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-38208

CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-38208

http://www.openwall.com/lists/oss-security/2021/08/17/2

oss-security - Re: Linux kernel: nfc: null ptr dereference in llcp_sock_getname
Mailing List;Third Party Advisory
https://github.com/torvalds/linux/commit/4ac06a1e013cf5fdd963317ffd3b968560f33bba

nfc: fix NULL ptr dereference in llcp_sock_getname() after failed con… · torvalds/linux@4ac06a1 · GitHub
Exploit;Patch;Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/17/1

oss-security - Re: Linux kernel: nfc: null ptr dereference in llcp_sock_getname
Mailing List;Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/24/2

oss-security - Re: Linux kernel: nfc: null ptr dereference in llcp_sock_getname
Mailing List;Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10

Mailing List;Patch;Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1992810

1992810 – (CVE-2021-38208) CVE-2021-38208 kernel: NULL pointer dereference in net/nfc/llcp_sock.c by making a getsockname call after a certain type of failure of a bind call
Issue Tracking;Patch;Third Party Advisory

Jump to

Vulnerability Details : CVE-2021-38208

Products affected by CVE-2021-38208

Exploit prediction scoring system (EPSS) score for CVE-2021-38208

CVSS scores for CVE-2021-38208

CWE ids for CVE-2021-38208

References for CVE-2021-38208