Bug 2450768 (CVE-2026-4775)

Summary: CVE-2026-4775 libtiff: libtiff: Arbitrary code execution or denial of service via signed integer overflow in TIFF file processing
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the libtiff library. A remote attacker could exploit a signed integer overflow vulnerability in the putcontig8bitYCbCr44tile function by providing a specially crafted TIFF file. This flaw can lead to an out-of-bounds heap write due to incorrect memory pointer calculations, potentially causing a denial of service (application crash) or arbitrary code execution.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2450769, 2450770, 2450771, 2450772, 2450773    
Bug Blocks:    

Description OSIDB Bzimport 2026-03-24 14:34:15 UTC
A flaw was found in the libtiff library. A signed integer overflow exists in the putcontig8bitYCbCr44tile function (and potentially similar functions like putcontig8bitYCbCr42tile, putcontig8bitYCbCr22tile, and putcontig8bitYCbCr12tile) within tif_getimage.c. When processing a specially crafted TIFF file with an extremely large width and specific YCbCr subsampling, the calculation for the pointer progression variable (incr) can overflow the 32-bit signed integer boundary. This results in an incorrect negative progression of memory pointers, leading to an out-of-bounds heap write. An attacker could exploit this to cause a denial of service (application crash) or potentially execute arbitrary code.

Comment 2 errata-xmlrpc 2026-04-30 12:19:45 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:12265 https://access.redhat.com/errata/RHSA-2026:12265

Comment 3 errata-xmlrpc 2026-04-30 14:13:07 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:12271 https://access.redhat.com/errata/RHSA-2026:12271

Comment 4 errata-xmlrpc 2026-05-07 20:58:36 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:14929 https://access.redhat.com/errata/RHSA-2026:14929

Comment 5 errata-xmlrpc 2026-05-11 20:37:20 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:16055 https://access.redhat.com/errata/RHSA-2026:16055

Comment 6 errata-xmlrpc 2026-05-19 16:09:51 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:19150 https://access.redhat.com/errata/RHSA-2026:19150

Comment 7 errata-xmlrpc 2026-05-19 21:40:37 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:19363 https://access.redhat.com/errata/RHSA-2026:19363

Comment 8 errata-xmlrpc 2026-05-20 11:21:31 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:19586 https://access.redhat.com/errata/RHSA-2026:19586

Comment 9 errata-xmlrpc 2026-05-20 11:43:37 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:19585 https://access.redhat.com/errata/RHSA-2026:19585

Comment 10 errata-xmlrpc 2026-05-20 12:05:45 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-2026:19604 https://access.redhat.com/errata/RHSA-2026:19604

Comment 11 errata-xmlrpc 2026-05-20 12:06:51 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:19608 https://access.redhat.com/errata/RHSA-2026:19608

Comment 12 errata-xmlrpc 2026-05-20 12:11:01 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:19609 https://access.redhat.com/errata/RHSA-2026:19609

Comment 13 errata-xmlrpc 2026-05-20 13:18:19 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-2026:19659 https://access.redhat.com/errata/RHSA-2026:19659

Comment 14 errata-xmlrpc 2026-05-20 13:24:18 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-2026:19657 https://access.redhat.com/errata/RHSA-2026:19657

Comment 15 errata-xmlrpc 2026-05-20 14:04:07 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:19702 https://access.redhat.com/errata/RHSA-2026:19702

Comment 16 errata-xmlrpc 2026-05-26 03:52:20 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-2026:20583 https://access.redhat.com/errata/RHSA-2026:20583

Comment 17 errata-xmlrpc 2026-05-26 04:36:10 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-2026:20591 https://access.redhat.com/errata/RHSA-2026:20591

Comment 18 errata-xmlrpc 2026-05-26 04:42:18 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-2026:20592 https://access.redhat.com/errata/RHSA-2026:20592

Comment 19 errata-xmlrpc 2026-05-26 04:47:28 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:20585 https://access.redhat.com/errata/RHSA-2026:20585