SUSE-SU-2026:21243-1

Vulnerability from csaf_suse - Published: 2026-04-20 12:43 - Updated: 2026-04-20 12:43
Summary
Security update for libcap
Severity
Important
Notes
Title of the patch: Security update for libcap
Description of the patch: This update for libcap fixes the following issues: - CVE-2026-4878: local privilege escalation through file capability injection due to TOCTOU race condition in `cap_set_file()` (bsc#1261809).
Patchnames: SUSE-SLE-Micro-6.0-675
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2026-4878
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Linux Micro 6.0:libcap2-2.69-3.1.aarch64 —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:libcap2-2.69-3.1.s390x —
Vendor Fix
Unresolved product id: SUSE Linux Micro 6.0:libcap2-2.69-3.1.x86_64 —
Vendor Fix
Threats
Impact important
References
To clipboard 

{
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      "text": "important"
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    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
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        "title": "Title of the patch"
      },
      {
        "category": "description",
        "text": "This update for libcap fixes the following issues:\n\n- CVE-2026-4878: local privilege escalation through file capability injection due to TOCTOU race condition in\n  `cap_set_file()` (bsc#1261809).\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
        "text": "SUSE-SLE-Micro-6.0-675",
        "title": "Patchnames"
      },
      {
        "category": "legal_disclaimer",
        "text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
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        "summary": "SUSE ratings",
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      },
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      },
      {
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        "url": "https://www.suse.com/support/update/announcement/2026/suse-su-202621243-1/"
      },
      {
        "category": "self",
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        "url": "https://lists.suse.com/pipermail/sle-updates/2026-April/045908.html"
      },
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        "summary": "SUSE Bug 1261809",
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        "summary": "SUSE CVE CVE-2026-4878 page",
        "url": "https://www.suse.com/security/cve/CVE-2026-4878/"
      }
    ],
    "title": "Security update for libcap",
    "tracking": {
      "current_release_date": "2026-04-20T12:43:53Z",
      "generator": {
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      "id": "SUSE-SU-2026:21243-1",
      "initial_release_date": "2026-04-20T12:43:53Z",
      "revision_history": [
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          "number": "1",
          "summary": "Current version"
        }
      ],
      "status": "final",
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    }
  },
  "product_tree": {
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      {
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          {
            "branches": [
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                "name": "libcap2-2.69-3.1.aarch64",
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                }
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          },
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                "product": {
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                  }
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            "category": "product_family",
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        "category": "vendor",
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        },
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      },
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        "relates_to_product_reference": "SUSE Linux Micro 6.0"
      }
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-4878",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-4878"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in libcap. A local unprivileged user can exploit a Time-of-check-to-time-of-use (TOCTOU) race condition in the `cap_set_file()` function. This allows an attacker with write access to a parent directory to redirect file capability updates to an attacker-controlled file. By doing so, capabilities can be injected into or stripped from unintended executables, leading to privilege escalation.",
          "title": "CVE description"
        }
      ],
      "product_status": {
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          "SUSE Linux Micro 6.0:libcap2-2.69-3.1.aarch64",
          "SUSE Linux Micro 6.0:libcap2-2.69-3.1.s390x",
          "SUSE Linux Micro 6.0:libcap2-2.69-3.1.x86_64"
        ]
      },
      "references": [
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          "summary": "CVE-2026-4878",
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        },
        {
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          "summary": "SUSE Bug 1261809 for CVE-2026-4878",
          "url": "https://bugzilla.suse.com/1261809"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.0:libcap2-2.69-3.1.aarch64",
            "SUSE Linux Micro 6.0:libcap2-2.69-3.1.s390x",
            "SUSE Linux Micro 6.0:libcap2-2.69-3.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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            "SUSE Linux Micro 6.0:libcap2-2.69-3.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-04-20T12:43:53Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-4878"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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