ubuntu-cve-2026-52859
Vulnerability from osv_ubuntu
Published
2026-06-11 19:16
Modified
2026-06-22 17:44
Summary
Details

Vim is an open source, command line text editor. Prior to version 9.2.0565, the update_snapshot() function in src/terminal.c copies the visible terminal screen into the scrollback buffer when a snapshot is taken. For each screen cell it walks the cell's chars[] array with no upper bound, stopping only when it encounters a NUL terminator. When a cell legitimately fills all VTERM_MAX_CHARS_PER_CELL (6) slots — a base character plus five combining marks — the bundled libvterm returns the array without a terminating NUL, so the loop reads past the fixed six-element array and appends the out-of-bounds values to a buffer reserved for only six characters. A program whose output is rendered inside a :terminal window can trigger this with a short byte sequence and no Vim scripting, leading to a crash. This issue has been patched in version 9.2.0565.

Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
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          },
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          {
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          {
            "binary_name": "vim-gtk3",
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          },
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          },
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          },
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          },
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          }
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        "2:8.0.1453-1ubuntu1.11",
        "2:8.0.1453-1ubuntu1.12",
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    },
    {
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            "binary_name": "xxd",
            "binary_version": "2:8.2.3995-1ubuntu2.32"
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        "name": "vim",
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        "2:8.2.2434-3ubuntu4",
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        "2:8.2.3565-1ubuntu2",
        "2:8.2.3565-1ubuntu3",
        "2:8.2.3565-1ubuntu5",
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          {
            "binary_name": "vim-athena",
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          {
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          },
          {
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          },
          {
            "binary_name": "vim-motif",
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          {
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          },
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            "binary_name": "xxd",
            "binary_version": "2:9.1.0016-1ubuntu7.16"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "vim",
        "purl": "pkg:deb/ubuntu/vim@2:9.1.0016-1ubuntu7.16?arch=source\u0026distro=noble"
      },
      "ranges": [
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      "versions": [
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        "2:9.0.2087-1ubuntu1",
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        "2:9.0.2116-1ubuntu2",
        "2:9.0.2184-0ubuntu1",
        "2:9.0.2189-1ubuntu1",
        "2:9.1.0-1ubuntu1",
        "2:9.1.0016-1ubuntu2",
        "2:9.1.0016-1ubuntu6",
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        "2:9.1.0016-1ubuntu7.5",
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        "2:9.1.0016-1ubuntu7.7",
        "2:9.1.0016-1ubuntu7.8",
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        "2:9.1.0016-1ubuntu7.11",
        "2:9.1.0016-1ubuntu7.12",
        "2:9.1.0016-1ubuntu7.13",
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    },
    {
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        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "vim",
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          },
          {
            "binary_name": "vim-athena",
            "binary_version": "2:9.1.0967-1ubuntu6.7"
          },
          {
            "binary_name": "vim-common",
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          },
          {
            "binary_name": "vim-gtk3",
            "binary_version": "2:9.1.0967-1ubuntu6.7"
          },
          {
            "binary_name": "vim-gui-common",
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          {
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          {
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            "binary_name": "xxd",
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      },
      "package": {
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        "purl": "pkg:deb/ubuntu/vim@2:9.1.0967-1ubuntu6.7?arch=source\u0026distro=questing"
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            {
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          "type": "ECOSYSTEM"
        }
      ],
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        "2:9.1.0967-1ubuntu5",
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        "2:9.1.0967-1ubuntu6.1",
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    },
    {
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        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "vim",
            "binary_version": "2:9.1.2141-1ubuntu4.5"
          },
          {
            "binary_name": "vim-common",
            "binary_version": "2:9.1.2141-1ubuntu4.5"
          },
          {
            "binary_name": "vim-gtk3",
            "binary_version": "2:9.1.2141-1ubuntu4.5"
          },
          {
            "binary_name": "vim-gui-common",
            "binary_version": "2:9.1.2141-1ubuntu4.5"
          },
          {
            "binary_name": "vim-motif",
            "binary_version": "2:9.1.2141-1ubuntu4.5"
          },
          {
            "binary_name": "vim-nox",
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          },
          {
            "binary_name": "vim-runtime",
            "binary_version": "2:9.1.2141-1ubuntu4.5"
          },
          {
            "binary_name": "vim-tiny",
            "binary_version": "2:9.1.2141-1ubuntu4.5"
          },
          {
            "binary_name": "xxd",
            "binary_version": "2:9.1.2141-1ubuntu4.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "vim",
        "purl": "pkg:deb/ubuntu/vim@2:9.1.2141-1ubuntu4.5?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
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            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2:9.1.0967-1ubuntu6",
        "2:9.1.1882-1ubuntu1",
        "2:9.1.1882-1ubuntu2",
        "2:9.1.2141-1ubuntu1",
        "2:9.1.2141-1ubuntu2",
        "2:9.1.2141-1ubuntu4",
        "2:9.1.2141-1ubuntu4.1",
        "2:9.1.2141-1ubuntu4.2",
        "2:9.1.2141-1ubuntu4.3"
      ]
    }
  ],
  "aliases": [],
  "details": "Vim is an open source, command line text editor. Prior to version 9.2.0565, the update_snapshot() function in src/terminal.c copies the visible terminal screen into the scrollback buffer when a snapshot is taken. For each screen cell it walks the cell\u0027s chars[] array with no upper bound, stopping only when it encounters a NUL terminator. When a cell legitimately fills all VTERM_MAX_CHARS_PER_CELL (6) slots \u2014 a base character plus five combining marks \u2014 the bundled libvterm returns the array without a terminating NUL, so the loop reads past the fixed six-element array and appends the out-of-bounds values to a buffer reserved for only six characters. A program whose output is rendered inside a :terminal window can trigger this with a short byte sequence and no Vim scripting, leading to a crash. This issue has been patched in version 9.2.0565.",
  "id": "UBUNTU-CVE-2026-52859",
  "modified": "2026-06-22T17:44:44Z",
  "published": "2026-06-11T19:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-52859"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-52859"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/vim/vim/security/advisories/GHSA-47gw-8gc3-mgcm"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/vim/vim/commit/63680c6d3d52477817b49cd1a66e7aabe8a7aa19"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/vim/vim/releases/tag/v9.2.0565"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8451-1"
    }
  ],
  "related": [
    "USN-8451-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-52859"
  ]
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.