Bug 2463465 (CVE-2026-5435) - CVE-2026-5435 glibc: glibc: Out-of-bounds write via TSIG record processing
Summary: CVE-2026-5435 glibc: glibc: Out-of-bounds write via TSIG record processing
Keywords:
Status: NEW
Alias: CVE-2026-5435
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-28 14:02 UTC by OSIDB Bzimport
Modified: 2026-07-28 16:55 UTC (History)
7 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2026:47045 0 None None None 2026-07-28 11:24:09 UTC
Red Hat Product Errata RHSA-2026:42694 0 None None None 2026-07-21 11:58:18 UTC
Red Hat Product Errata RHSA-2026:42733 0 None None None 2026-07-21 14:23:33 UTC
Red Hat Product Errata RHSA-2026:42952 0 None None None 2026-07-22 02:46:26 UTC

Description OSIDB Bzimport 2026-04-28 14:02:07 UTC 
The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records.
Comment 3 errata-xmlrpc 2026-07-21 11:58:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:42694 https://access.redhat.com/errata/RHSA-2026:42694
Comment 4 errata-xmlrpc 2026-07-21 14:23:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:42733 https://access.redhat.com/errata/RHSA-2026:42733
Comment 5 errata-xmlrpc 2026-07-22 02:46:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:42952 https://access.redhat.com/errata/RHSA-2026:42952
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