CVE-2026-49426 (GCVE-0-2026-49426)

Vulnerability from cvelistv5 – Published: 2026-08-19 06:04 – Updated: 2026-08-19 06:04
VLAI
Title
Incorrect audit records for ptrace(2) syscall requests
Summary
When auditing a system call executed via ptrace(PT_SC_REMOTE), the kernel passed the return value of an internal setup function to AUDIT_SYSCALL_EXIT() rather than the actual result of the executed system call. As a result, committed audit records for system calls which returned an error do not reflect the true outcome of the operation. That is, they indicate that the operation succeeded when it in fact failed. Audit records for system calls executed via ptrace(PT_SC_REMOTE) may show an incorrect error status. An attacker with the ability to debug a process could use this to produce misleading audit trails, potentially undermining audit-based Intrusion Detection Systems (IDS).
Severity
No CVSS data available.
CWE
  • CWE-223 - Omission of Security-relevant Information
  • CWE-224 - Obscured Security-relevant Information by Alternate Name
Assigner
References
Impacted products
Vendor Product Version CPE status
FreeBSD FreeBSD Affected: 15.1-RELEASE , < p1 (release)
Affected: 15.0-RELEASE , < p11 (release)
Affected: 14.4-RELEASE , < p7 (release)
Affected: 14.3-RELEASE , < p16 (release)
guessed Create a notification for this product.
Date Public
2026-06-30 20:00
Credits
Kyle Evans
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "audit"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
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              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
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              "status": "affected",
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            }
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          "type": "finder",
          "value": "Kyle Evans"
        }
      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "When auditing a system call executed via ptrace(PT_SC_REMOTE), the kernel passed the return value of an internal setup function to AUDIT_SYSCALL_EXIT() rather than the actual result of the executed system call.  As a result, committed audit records for system calls which returned an error do not reflect the true outcome of the operation.  That is, they indicate that the operation succeeded when it in fact failed.\n\nAudit records for system calls executed via ptrace(PT_SC_REMOTE) may show an incorrect error status.  An attacker with the ability to debug a process could use this to produce misleading audit trails, potentially undermining audit-based Intrusion Detection Systems (IDS)."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-223",
              "description": "CWE-223: Omission of Security-relevant Information",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-224",
              "description": "CWE-224: Obscured Security-relevant Information by Alternate Name",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T06:04:36.581Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:45.audit.asc"
        }
      ],
      "title": "Incorrect audit records for ptrace(2) syscall requests",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-49426",
    "datePublished": "2026-08-19T06:04:36.581Z",
    "dateReserved": "2026-05-29T20:24:28.616Z",
    "dateUpdated": "2026-08-19T06:04:36.581Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-49426",
      "date": "2026-08-25",
      "epss": "0.00149",
      "percentile": "0.04392"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-49426\",\"sourceIdentifier\":\"secteam@freebsd.org\",\"published\":\"2026-08-19T06:17:41.720\",\"lastModified\":\"2026-08-19T06:17:41.720\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"When auditing a system call executed via ptrace(PT_SC_REMOTE), the kernel passed the return value of an internal setup function to AUDIT_SYSCALL_EXIT() rather than the actual result of the executed system call.  As a result, committed audit records for system calls which returned an error do not reflect the true outcome of the operation.  That is, they indicate that the operation succeeded when it in fact failed.\\n\\nAudit records for system calls executed via ptrace(PT_SC_REMOTE) may show an incorrect error status.  An attacker with the ability to debug a process could use this to produce misleading audit trails, potentially undermining audit-based Intrusion Detection Systems (IDS).\"}],\"affected\":[{\"source\":\"secteam@freebsd.org\",\"affectedData\":[{\"vendor\":\"FreeBSD\",\"product\":\"FreeBSD\",\"defaultStatus\":\"unknown\",\"modules\":[\"audit\"],\"versions\":[{\"version\":\"15.1-RELEASE\",\"lessThan\":\"p1\",\"versionType\":\"release\",\"status\":\"affected\"},{\"version\":\"15.0-RELEASE\",\"lessThan\":\"p11\",\"versionType\":\"release\",\"status\":\"affected\"},{\"version\":\"14.4-RELEASE\",\"lessThan\":\"p7\",\"versionType\":\"release\",\"status\":\"affected\"},{\"version\":\"14.3-RELEASE\",\"lessThan\":\"p16\",\"versionType\":\"release\",\"status\":\"affected\"}]}]}],\"metrics\":{},\"weaknesses\":[{\"source\":\"secteam@freebsd.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-223\"},{\"lang\":\"en\",\"value\":\"CWE-224\"}]}],\"references\":[{\"url\":\"https://security.freebsd.org/advisories/FreeBSD-SA-26:45.audit.asc\",\"source\":\"secteam@freebsd.org\"}]}}"
  }
}



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