Bug 2451805 (CVE-2026-33416) - CVE-2026-33416 libpng: libpng: Arbitrary code execution due to use-after-free vulnerability
Summary: CVE-2026-33416 libpng: libpng: Arbitrary code execution due to use-after-free...
Keywords:
Status: NEW
Alias: CVE-2026-33416
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2452135 2452136 2452137 2452138 2452139 2452140 2452141 2452142 2452143 2452145 2452146 2452148 2452149 2452150 2452151 2452152 2452153 2452154 2452156 2452157 2452159 2452144 2452147 2452155 2452158
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-26 18:02 UTC by OSIDB Bzimport
Modified: 2026-05-11 01:32 UTC (History)
18 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 RHSA-2026:11805 0 None None None 2026-04-29 15:42:40 UTC
Red Hat Product Errata RHSA-2026:11813 0 None None None 2026-04-29 16:09:02 UTC
Red Hat Product Errata RHSA-2026:12264 0 None None None 2026-04-30 11:49:03 UTC
Red Hat Product Errata RHSA-2026:13342 0 None None None 2026-05-04 06:02:51 UTC
Red Hat Product Errata RHSA-2026:13412 0 None None None 2026-05-04 12:04:23 UTC
Red Hat Product Errata RHSA-2026:13533 0 None None None 2026-05-04 15:51:37 UTC
Red Hat Product Errata RHSA-2026:13582 0 None None None 2026-05-05 06:32:52 UTC
Red Hat Product Errata RHSA-2026:13583 0 None None None 2026-05-05 06:38:50 UTC
Red Hat Product Errata RHSA-2026:13596 0 None None None 2026-05-05 06:30:25 UTC
Red Hat Product Errata RHSA-2026:13600 0 None None None 2026-05-05 06:48:43 UTC
Red Hat Product Errata RHSA-2026:13665 0 None None None 2026-05-05 09:25:47 UTC
Red Hat Product Errata RHSA-2026:13682 0 None None None 2026-05-05 10:14:43 UTC
Red Hat Product Errata RHSA-2026:13683 0 None None None 2026-05-05 10:20:57 UTC
Red Hat Product Errata RHSA-2026:13922 0 None None None 2026-05-06 07:07:26 UTC
Red Hat Product Errata RHSA-2026:13977 0 None None None 2026-05-06 11:36:11 UTC
Red Hat Product Errata RHSA-2026:14223 0 None None None 2026-05-06 16:54:54 UTC
Red Hat Product Errata RHSA-2026:14303 0 None None None 2026-05-06 19:18:00 UTC
Red Hat Product Errata RHSA-2026:15889 0 None None None 2026-05-11 01:32:57 UTC
Red Hat Product Errata RHSA-2026:7671 0 None None None 2026-04-13 02:23:51 UTC
Red Hat Product Errata RHSA-2026:7672 0 None None None 2026-04-13 02:19:47 UTC
Red Hat Product Errata RHSA-2026:8052 0 None None None 2026-04-14 11:32:47 UTC
Red Hat Product Errata RHSA-2026:8459 0 None None None 2026-04-16 12:51:33 UTC
Red Hat Product Errata RHSA-2026:9345 0 None None None 2026-04-21 15:02:22 UTC
Red Hat Product Errata RHSA-2026:9638 0 None None None 2026-04-22 07:35:50 UTC

Description OSIDB Bzimport 2026-03-26 18:02:19 UTC 
LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. In versions 1.2.1 through 1.6.55, `png_set_tRNS` and `png_set_PLTE` each alias a heap-allocated buffer between `png_struct` and `png_info`, sharing a single allocation across two structs with independent lifetimes. The `trans_alpha` aliasing has been present since at least libpng 1.0, and the `palette` aliasing since at least 1.2.1. Both affect all prior release lines `png_set_tRNS` sets `png_ptr->trans_alpha = info_ptr->trans_alpha` (256-byte buffer) and `png_set_PLTE` sets `info_ptr->palette = png_ptr->palette` (768-byte buffer). In both cases, calling `png_free_data` (with `PNG_FREE_TRNS` or `PNG_FREE_PLTE`) frees the buffer through `info_ptr` while the corresponding `png_ptr` pointer remains dangling. Subsequent row-transform functions dereference and, in some code paths, write to the freed memory. A second call to `png_set_tRNS` or `png_set_PLTE` has the same effect, because both functions call `png_free_data` internally before reallocating the `info_ptr` buffer. Version 1.6.56 fixes the issue.
Comment 2 errata-xmlrpc 2026-04-13 02:19:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:7672 https://access.redhat.com/errata/RHSA-2026:7672
Comment 3 errata-xmlrpc 2026-04-13 02:23:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:7671 https://access.redhat.com/errata/RHSA-2026:7671
Comment 4 errata-xmlrpc 2026-04-14 11:32:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:8052 https://access.redhat.com/errata/RHSA-2026:8052
Comment 5 errata-xmlrpc 2026-04-16 12:51:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:8459 https://access.redhat.com/errata/RHSA-2026:8459
Comment 6 errata-xmlrpc 2026-04-21 15:02:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:9345 https://access.redhat.com/errata/RHSA-2026:9345
Comment 7 errata-xmlrpc 2026-04-22 07:35:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:9638 https://access.redhat.com/errata/RHSA-2026:9638
Comment 8 errata-xmlrpc 2026-04-29 15:42:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2026:11805 https://access.redhat.com/errata/RHSA-2026:11805
Comment 9 errata-xmlrpc 2026-04-29 16:08:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:11813 https://access.redhat.com/errata/RHSA-2026:11813
Comment 10 errata-xmlrpc 2026-04-30 11:49:00 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:12264 https://access.redhat.com/errata/RHSA-2026:12264
Comment 11 errata-xmlrpc 2026-05-04 06:02:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:13342 https://access.redhat.com/errata/RHSA-2026:13342
Comment 12 errata-xmlrpc 2026-05-04 12:04:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:13412 https://access.redhat.com/errata/RHSA-2026:13412
Comment 13 errata-xmlrpc 2026-05-04 15:51:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:13533 https://access.redhat.com/errata/RHSA-2026:13533
Comment 14 errata-xmlrpc 2026-05-05 06:30:23 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:13596 https://access.redhat.com/errata/RHSA-2026:13596
Comment 15 errata-xmlrpc 2026-05-05 06:32:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:13582 https://access.redhat.com/errata/RHSA-2026:13582
Comment 16 errata-xmlrpc 2026-05-05 06:38:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:13583 https://access.redhat.com/errata/RHSA-2026:13583
Comment 17 errata-xmlrpc 2026-05-05 06:48:41 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-2026:13600 https://access.redhat.com/errata/RHSA-2026:13600
Comment 18 errata-xmlrpc 2026-05-05 09:25:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:13665 https://access.redhat.com/errata/RHSA-2026:13665
Comment 19 errata-xmlrpc 2026-05-05 10:14:40 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-2026:13682 https://access.redhat.com/errata/RHSA-2026:13682
Comment 20 errata-xmlrpc 2026-05-05 10:20:55 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 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:13683 https://access.redhat.com/errata/RHSA-2026:13683
Comment 21 errata-xmlrpc 2026-05-06 07:07:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:13922 https://access.redhat.com/errata/RHSA-2026:13922
Comment 22 errata-xmlrpc 2026-05-06 11:36:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:13977 https://access.redhat.com/errata/RHSA-2026:13977
Comment 23 errata-xmlrpc 2026-05-06 16:54:51 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-2026:14223 https://access.redhat.com/errata/RHSA-2026:14223
Comment 24 errata-xmlrpc 2026-05-06 19:17:58 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-2026:14303 https://access.redhat.com/errata/RHSA-2026:14303
Comment 25 errata-xmlrpc 2026-05-11 01:32:55 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 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:15889 https://access.redhat.com/errata/RHSA-2026:15889
Note You need to log in before you can comment on or make changes to this bug.