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CVE-2026-53910VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-53910· Low 2.1

Not known to be exploited · CVSS 2.1 Low.

Data as of 8 Nov 2026, 23:24 UTC

CVSS 4.0 base score
2.1Low
How severe the flaw is on the 0–10 CVSS scale.
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:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Jul 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 9 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
GNUdiffutilsAffected
  • <=3.12
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

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