CVE-2026-96280Flatpak: flatpak: buffer overflow in oci delta stream path names on 32-bit systems
Updated under an hour ago ()
Does this affect you?
It affects Red Hat Enterprise Linux 10. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.60%, higher than 47% of scored CVEs.
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The OCI delta stream parser read sizes as guint64 but passed them to GLib I/O and allocation functions expecting gsize (32 bits on 32-bit systems), causing undersized allocations while subsequent operations use the original 64-bit size, leading to heap buffer overflows. An attacker controlling an OCI registry can craft a delta stream that triggers this during flatpak install/update, potentially achieving code execution on 32-bit systems.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-197
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.60% (percentile 47)
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 0:1.16.0-9.el10_2.4 not affected | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:80497vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:80498vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:80687vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-96280vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2539419issue-tracking, x-refsource-redhat
- https://github.com/flatpak/flatpak/security/advisories/GHSA-jr92-2v97-wgvc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.