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VulnerabilityPublished Updated

CVE-2026-96280: Red Hat Enterprise Linux 10 · Numeric Truncation Error

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 7.5 High.

Data as of 10 Nov 2026, 13:57 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.17.5
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:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
Red Hat Enterprise Linux 10flatpakAffected–Fixed in–
Red Hat Enterprise Linux 10.0 Extended Update SupportflatpakAffected–Fixed in–
Red Hat Enterprise Linux 8flatpakAffected–Fixed in–
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportflatpakAffected–Fixed in–
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnflatpakAffected–Fixed in–
Red Hat Enterprise Linux 9flatpakAffected–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

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