CVE-2026-96280: Red Hat Enterprise Linux 10 · Numeric Truncation Error
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 7.5 High.
Data as of 10 Nov 2026, 13:57 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 7.5 |
|---|
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 27 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10flatpak | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10.0 Extended Update Supportflatpak | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8flatpak | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportflatpak | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onflatpak | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9flatpak | Affected– | Fixed in– |
AI-suggested
Red Hat advises installing applications only from trusted OCI registries. Flatpak remotes using the default OSTree transport are not affected. Users should avoid untrusted OCI registries and monitor Red Hat advisories for any forthcoming patches or updates addressing this issue.
Description
CVE-2026-96280 is a numeric truncation error vulnerability in the OCI delta stream parser used by Flatpak on Red Hat Enterprise Linux 10 32-bit systems. The parser reads sizes as 64-bit values but passes them to functions expecting 32-bit sizes, causing undersized allocations and subsequent heap buffer overflows. An attacker controlling an OCI registry can craft malicious delta streams to trigger this during Flatpak install or update, potentially achieving code execution. This vulnerability requires user interaction and affects only 32-bit systems due to the size truncation. The flaw leads to a full compromise of the Flatpak client process privileges if exploited.
References
- access.redhat.com/security/cve/CVE-2026-96280 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2539419 (opens in a new tab)
- github.com/flatpak/flatpak/security/advisories/GHSA-jr92-2v97-wgvc (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:80498 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:80497 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:80687 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:89733 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:90364 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:92369 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:92221 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:95493 (opens in a new tab)