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Bug 719472 (CVE-2019-6488) - <sys-libs/glibc-2.29: Possible denial of service (CVE-2019-6488)
Summary: <sys-libs/glibc-2.29: Possible denial of service (CVE-2019-6488)
Alias: CVE-2019-6488
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
Whiteboard: A3 [glsa+ cve]
Depends on:
Reported: 2020-04-26 01:17 UTC by GLSAMaker/CVETool Bot
Modified: 2020-06-13 01:05 UTC (History)
1 user (show)

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


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Description GLSAMaker/CVETool Bot gentoo-dev 2020-04-26 01:17:23 UTC
CVE-2019-6488 (
  The string component in the GNU C Library (aka glibc or libc6) through 2.28,
  when running on the x32 architecture, incorrectly attempts to use a 64-bit
  register for size_t in assembly codes, which can lead to a segmentation
  fault or possibly unspecified other impact, as demonstrated by a crash in
  __memmove_avx_unaligned_erms in
  sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S during a memcpy.
Comment 1 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-04-26 01:19:58 UTC
@maintainer(s), please let us know what patchset this was fixed in (if at all) for 2.28.
Comment 2 Sergei Trofimovich (RETIRED) gentoo-dev 2020-04-26 08:56:53 UTC
That is a I don't think gentoo has a fix in 2.28.

Does it matter? 2.28 is masked in gentoo.
Comment 3 Yury German Gentoo Infrastructure gentoo-dev 2020-05-22 00:59:22 UTC
As per upstream:


H.J. Lu 2019-01-22 03:52:25 UTC
Fixed for 2.29:

commit 5165de69c0908e28a380cbd4bb054e55ea4abc95
Author: H.J. Lu <>
Date:   Mon Jan 21 11:36:36 2019 -0800

    x86-64 strnlen/wcsnlen: Properly handle the length parameter [BZ# 24097]


2.29 has been masked in tree.
Added to an existing GLSA Request.
Comment 4 GLSAMaker/CVETool Bot gentoo-dev 2020-06-13 01:05:28 UTC
This issue was resolved and addressed in
 GLSA 202006-04 at
by GLSA coordinator Aaron Bauman (b-man).