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Bug 472384 (CVE-2013-2141) - Kernel : signal: information leak in tkill/tgkill (CVE-2013-2141)
Summary: Kernel : signal: information leak in tkill/tgkill (CVE-2013-2141)
Alias: CVE-2013-2141
Product: Gentoo Security
Classification: Unclassified
Component: Kernel (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Kernel Security
Depends on:
Reported: 2013-06-05 08:45 UTC by Agostino Sarubbo
Modified: 2016-12-07 04:17 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2013-06-05 08:45:35 UTC
From ${URL} :

Linux kernel which supports tkill/tgkill routines is vulnerable to an
information leakage flaw. It occurs when routine tkill(2) or tgkill(2) is used
send signal to thread.

A user/program could use this flaw to leak kernel memory bytes.

Upstream fix:

Comment 1 GLSAMaker/CVETool Bot gentoo-dev 2013-08-30 01:03:34 UTC
CVE-2013-2141 (
  The do_tkill function in kernel/signal.c in the Linux kernel before 3.8.9
  does not initialize a certain data structure, which allows local users to
  obtain sensitive information from kernel memory via a crafted application
  that makes a (1) tkill or (2) tgkill system call.