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CVE-2023-5156

Published: 25 September 2023

A flaw was found in the GNU C Library. A recent fix for CVE-2023-4806 introduced the potential for a memory leak, which may result in an application crash.

Notes

AuthorNote
ccdm94
as of 2023-10-19, no releases are vulnerable to this CVE, as
the fix for CVE-2023-4806 has not yet been applied to glibc
in any of these releases. Whenever CVE-2023-4806 is patched,
the patch for CVE-2023-5156 must be included as well in order
to avoid regressions and the inclusion of a new vulnerability
in glibc.

the backports used to patch xenial, bionic and focal for
CVE-2023-4806 do not introduce this vulnerability.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
glibc
Launchpad, Ubuntu, Debian
trusty Ignored
(end of standard support)
upstream Needs triage

bionic Not vulnerable
(code not present)
focal Not vulnerable
(code not present)
jammy
Released (2.35-0ubuntu3.5)
lunar
Released (2.37-0ubuntu2.2)
mantic
Released (2.38-1ubuntu5)
xenial Not vulnerable
(code not present)
Patches:
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ec6b95c3303c700eb89eebeda2d7264cc184a796 (2.39)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5ee59ca371b99984232d7584fe2b1a758b4421d3 (2.38)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=4473d1b87d04b25cdd0e0354814eeaa421328268 (2.37)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=856bac55f98dc840e7c27cfa82262b933385de90 (2.36)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=17092c0311f954e6f3c010f73ce3a78c24ac279a (2.35)
upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=8006457ab7e1cd556b919f477348a96fe88f2e49 (2.34)
eglibc
Launchpad, Ubuntu, Debian
trusty Deferred

xenial Does not exist

bionic Does not exist

focal Does not exist

jammy Does not exist

lunar Does not exist

upstream Needs triage

mantic Does not exist

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H