Bug 2560137

Summary: CVE-2026-115504 mingw-cfitsio: cfitsio: arbitrary code execution via crafted FITS file [fedora-43]
Product: [Fedora] Fedora Reporter: Ronit Dey <rdey>
Component: mingw-cfitsioAssignee: Sandro Mani <manisandro>
Status: ON_QA --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: high    
Version: 43CC: manisandro
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["2acbf4c7-6e89-4e07-9d3e-ee182cc25053"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2559307    

Description Ronit Dey 2026-10-23 17:54:47 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

CFITSIO through 4.7.0 contains an out-of-bounds write vulnerability in ffgcls2() in getcols.c that trusts attacker-controlled heap descriptor lengths for variable-length string columns. Attackers can supply a crafted FITS file that overflows a fixed 28,800-byte stack buffer and the caller's string array, enabling arbitrary code execution.
Comment 1 Fedora Update System 2026-10-31 16:29:34 UTC 
FEDORA-2026-043f4fc6f5 (mingw-cfitsio-4.6.4-3.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-043f4fc6f5
Comment 2 Fedora Update System 2026-11-01 03:18:03 UTC 
FEDORA-2026-043f4fc6f5 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-043f4fc6f5`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-043f4fc6f5

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.