Bug 2443828 (CVE-2026-3442)

Summary: CVE-2026-3442 binutils: GNU Binutils: Information disclosure or denial of service via out-of-bounds read in bfd linker
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: crizzo, gtanzill, jbuscemi, jmitchel, kshier, pbohmill, teagle
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in GNU Binutils. This vulnerability, a heap-based buffer overflow, specifically an out-of-bounds read, exists in the bfd linker component. An attacker could exploit this by convincing a user to process a specially crafted malicious XCOFF object file. Successful exploitation may lead to the disclosure of sensitive information or cause the application to crash, resulting in an application level denial of service.
 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: 2443830, 2443831, 2443832, 2443834, 2443835, 2443836, 2443837, 2443833    
Bug Blocks:    

Description OSIDB Bzimport 2026-03-02 14:16:00 UTC 
Summary: A separate heap-based buffer overflow (Out-of-Bounds Read) was found in GNU Binutils (bfd linker) in bfd/xcofflink.c. This issue occurs in xcoff_link_add_symbols (approx line 2282) where r_symndx is used to index symbol hashes without sufficient bounds checking.
Requirements to exploit: An attacker needs to trick a user into running the ld linker against a specially crafted malicious XCOFF object file.