net/packet/af_packet.c in the Linux kernel before 2.6.39.3 does not properly restrict user-space access to certain packet data structures associated with VLAN Tag Control Information, which allows local users to obtain potentially sensitive information via a crafted application.
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.3
http://www.openwall.com/lists/oss-security/2011/08/03/7
https://bugzilla.redhat.com/show_bug.cgi?id=728023
https://github.com/torvalds/linux/commit/13fcb7bd322164c67926ffe272846d4860196dc6
Source: MITRE
Published: 2012-05-24
Updated: 2020-07-29
Type: CWE-200
Base Score: 1.9
Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 3.4
Severity: LOW
Base Score: 5.5
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Impact Score: 3.6
Exploitability Score: 1.8
Severity: MEDIUM