Bug 2492248 (CVE-2026-58013) - CVE-2026-58013 glib: buffer over-read in glib/giochannel.c via "g_io_channel_read_line_backend"
Summary: CVE-2026-58013 glib: buffer over-read in glib/giochannel.c via "g_io_channel_...
Keywords:
Status: NEW
Alias: CVE-2026-58013
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: 2494876 2494877 2494878
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-24 16:57 UTC by OSIDB Bzimport
Modified: 2026-10-06 07:37 UTC (History)
6 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-2026:57606 0 None None None 2026-08-20 16:35:10 UTC
Red Hat Product Errata RHBA-2026:58991 0 None None None 2026-08-24 12:47:53 UTC
Red Hat Product Errata RHBA-2026:61344 0 None None None 2026-08-31 09:10:09 UTC
Red Hat Product Errata RHBA-2026:61808 0 None None None 2026-09-01 00:25:57 UTC
Red Hat Product Errata RHBA-2026:62574 0 None None None 2026-09-02 10:22:19 UTC
Red Hat Product Errata RHSA-2026:49512 0 None None None 2026-08-03 01:47:16 UTC
Red Hat Product Errata RHSA-2026:55440 0 None None None 2026-08-17 05:48:53 UTC
Red Hat Product Errata RHSA-2026:57015 0 None None None 2026-08-19 16:42:08 UTC
Red Hat Product Errata RHSA-2026:61766 0 None None None 2026-08-31 19:29:26 UTC
Red Hat Product Errata RHSA-2026:65762 0 None None None 2026-09-09 02:27:00 UTC
Red Hat Product Errata RHSA-2026:65763 0 None None None 2026-09-09 03:09:50 UTC
Red Hat Product Errata RHSA-2026:65767 0 None None None 2026-09-09 02:59:47 UTC
Red Hat Product Errata RHSA-2026:65768 0 None None None 2026-09-09 03:27:26 UTC
Red Hat Product Errata RHSA-2026:65769 0 None None None 2026-09-09 03:04:27 UTC
Red Hat Product Errata RHSA-2026:65770 0 None None None 2026-09-09 03:28:31 UTC
Red Hat Product Errata RHSA-2026:65771 0 None None None 2026-09-09 02:59:30 UTC
Red Hat Product Errata RHSA-2026:65773 0 None None None 2026-09-09 03:15:00 UTC

Description OSIDB Bzimport 2026-06-24 16:57:18 UTC 
A heap-buffer-overflow READ occurs in g_io_channel_read_line_backend() at giochannel.c:1831 when a custom line terminator of length > 1 is set via g_io_channel_set_line_term(). The memcmp call reads line_term_len bytes from nextchar, but the loop condition nextchar < lastchar only guarantees 1 byte is available. When nextchar is within line_term_len - 1 bytes of lastchar, memcmp reads past the GString buffer into ASan redzone / unallocated memory.
Comment 3 errata-xmlrpc 2026-08-03 01:47:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:49512 https://access.redhat.com/errata/RHSA-2026:49512
Comment 4 errata-xmlrpc 2026-08-17 05:48:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:55440 https://access.redhat.com/errata/RHSA-2026:55440
Comment 5 errata-xmlrpc 2026-08-19 16:42:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:57015 https://access.redhat.com/errata/RHSA-2026:57015
Comment 6 errata-xmlrpc 2026-08-31 19:29:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:61766 https://access.redhat.com/errata/RHSA-2026:61766
Comment 7 errata-xmlrpc 2026-09-09 02:26:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:65762 https://access.redhat.com/errata/RHSA-2026:65762
Comment 8 errata-xmlrpc 2026-09-09 02:59:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:65771 https://access.redhat.com/errata/RHSA-2026:65771
Comment 9 errata-xmlrpc 2026-09-09 02:59:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:65767 https://access.redhat.com/errata/RHSA-2026:65767
Comment 10 errata-xmlrpc 2026-09-09 03:04:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:65769 https://access.redhat.com/errata/RHSA-2026:65769
Comment 11 errata-xmlrpc 2026-09-09 03:09:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:65763 https://access.redhat.com/errata/RHSA-2026:65763
Comment 12 errata-xmlrpc 2026-09-09 03:14:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:65773 https://access.redhat.com/errata/RHSA-2026:65773
Comment 13 errata-xmlrpc 2026-09-09 03:27:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:65768 https://access.redhat.com/errata/RHSA-2026:65768
Comment 14 errata-xmlrpc 2026-09-09 03:28:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:65770 https://access.redhat.com/errata/RHSA-2026:65770
Note You need to log in before you can comment on or make changes to this bug.