CVE-2026-18839 (GCVE-0-2026-18839)

Vulnerability from cvelistv5 – Published: 2026-08-05 20:45 – Updated: 2026-10-16 11:28
VLAI
Title
Popt-devel: popt-static: size_t underflow in singleoptionhelp
Summary
An integer underflow was found in the popt library when formatting help text for option tables that exceed the terminal width. A local user who can cause an application to print help under those conditions may cause that application to crash or fail to display help, resulting in a denial of service of the affected application.
Severity
2.2 (Low)
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 13:33 UTC
CWE
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1062 records in the last 180 days details
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:77932 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-18839 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2511010 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-08-05 18:56
Credits
Red Hat would like to thank Matanya Moses (Checkpoint) for reporting this issue.
Show details on NVD website
To clipboard 

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            {
              "name": "RHBZ#2511010",
              "tags": [
                "issue-tracking",
                "x_refsource_REDHAT"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511010"
            }
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2026-08-04T14:14:22.907Z",
              "value": "Reported to Red Hat."
            },
            {
              "lang": "en",
              "time": "2026-08-05T18:56:50.736Z",
              "value": "Made public."
            }
          ],
          "title": "Popt-devel: popt-static: size_t underflow in singleoptionhelp",
          "workarounds": [
            {
              "lang": "en",
              "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."
            }
          ],
          "x_generator": {
            "engine": "cvelib 1.8.0"
          },
          "x_redhatCweChain": "CWE-191: Integer Underflow (Wrap or Wraparound)"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "assignerShortName": "redhat",
        "cveId": "CVE-2026-18839",
        "datePublished": "2026-08-05T20:45:17.163Z",
        "dateReserved": "2026-08-04T14:41:25.490Z",
        "dateUpdated": "2026-10-16T11:28:40.962Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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