RHSA-2026:57610

Vulnerability from csaf_opensuse - Published: 2026-08-20 00:00 - Updated: 2026-09-16 18:45
Summary
security update for kbd
Severity
Moderate
Notes
Title of the patch: security update for kbd
Description of the patch: This security update provides a functional equivalent of RHSA-2026:57610. The original Red Hat(R) advisory is available from the Red Hat web site at https://access.redhat.com/errata/RHSA-2026:57610.
Patchnames: RHSA-2026:57610
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-2026-72693
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Product Identifier Version Remediation
Unresolved product id: SUSE Liberty Linux 9:kbd-2.4.0-12.el9_8.x86_64 —
Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:kbd-legacy-2.4.0-12.el9_8.noarch —
Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:kbd-misc-2.4.0-12.el9_8.noarch —
Vendor Fix
Threats
Impact important
References
To clipboard 

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    "distribution": {
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        "text": "This security update provides a functional equivalent of RHSA-2026:57610.\nThe original Red Hat(R) advisory is available from the Red Hat web site at\nhttps://access.redhat.com/errata/RHSA-2026:57610.\n",
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      },
      {
        "category": "self",
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      },
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        "summary": "SUSE CVE CVE-2026-72693 page",
        "url": "https://www.suse.com/security/cve/CVE-2026-72693/"
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    "title": "security update for kbd",
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      "revision_history": [
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      "status": "final",
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    }
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  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "kbd-legacy-2.4.0-12.el9_8.noarch",
                "product": {
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    "relationships": [
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          "product_id": "SUSE Liberty Linux 9:kbd-2.4.0-12.el9_8.x86_64"
        },
        "product_reference": "kbd-2.4.0-12.el9_8.x86_64",
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      },
      {
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        },
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-72693",
      "ids": [
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          "text": "https://www.suse.com/security/cve/CVE-2026-72693"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "`openvt -u` is intended to identify the owner of the current VT and then execute `login` as that user from a privileged context. In the documented `kbrequest`/init usage, the ownership test in `authenticate_user()` relies on `stat(\"/proc/\u003cpid\u003e/fd/0\")`. `stat()` on `/proc/\u003cpid\u003e/fd/0` follows the symlink to the underlying TTY device node. As a result, `buf.st_uid` reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to `root` or the getty owner after logout while an unprivileged process still has `fd 0` attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the `-u` path executes a passwordless login as the selected user. In the documented `kbrequest`/init deployment using `openvt -us`, this can result in passwordless `login -f root` on the spawned VT. This report establishes that privilege escalation path for that documented deployment; it does not claim equivalent reachability for deployments that do not use `openvt -u` from a privileged `kbrequest`/init path.",
          "title": "CVE description"
        }
      ],
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          "SUSE Liberty Linux 9:kbd-legacy-2.4.0-12.el9_8.noarch",
          "SUSE Liberty Linux 9:kbd-misc-2.4.0-12.el9_8.noarch"
        ]
      },
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          "url": "https://www.suse.com/security/cve/CVE-2026-72693"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1275441 for CVE-2026-72693",
          "url": "https://bugzilla.suse.com/1275441"
        }
      ],
      "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 Liberty Linux 9:kbd-2.4.0-12.el9_8.x86_64",
            "SUSE Liberty Linux 9:kbd-legacy-2.4.0-12.el9_8.noarch",
            "SUSE Liberty Linux 9:kbd-misc-2.4.0-12.el9_8.noarch"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
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            "SUSE Liberty Linux 9:kbd-legacy-2.4.0-12.el9_8.noarch",
            "SUSE Liberty Linux 9:kbd-misc-2.4.0-12.el9_8.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-08-20T00:00:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-72693"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.