Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 2.1 Low.
Data as of 8 Nov 2026, 23:24 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/SI:L/SA:LExploitation evidence
Disclosed: evidence found.
CVE published 22 Jul 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 9 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| GNUdiffutils | Affected
| Fixed in– |
AI-suggested
Red Hat has released an update for diffutils-3.12-6.1.hum1 in Red Hat Hardened Images that addresses this vulnerability. Users should apply this update to remediate the issue. Additionally, avoid running diff3 with untrusted input for the --diff-program argument or processing untrusted diff output to mitigate risk.
Description
A heap-based buffer overflow vulnerability (CVE-2026-53910) exists in the diff3 program of the diffutils package included in Red Hat Hardened Images. This flaw arises from multiple signed integer overflows in line-mapping calculations when processing specially crafted diff output, potentially causing denial of service or memory corruption. Exploitation requires control over the diff output used by diff3 or convincing a user to run diff3 with malicious input, often requiring prior execution privileges. The vulnerability is rated as low severity by Red Hat.
References
- access.redhat.com/errata/RHSA-2026:45327 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-53910 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- images.redhat.com (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_45327.json (opens in a new tab)