CVE-2022-49948 (GCVE-0-2022-49948)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:00 – Updated: 2025-12-23 13:26
VLAI?
Title
vt: Clear selection before changing the font
Summary
In the Linux kernel, the following vulnerability has been resolved: vt: Clear selection before changing the font When changing the console font with ioctl(KDFONTOP) the new font size can be bigger than the previous font. A previous selection may thus now be outside of the new screen size and thus trigger out-of-bounds accesses to graphics memory if the selection is removed in vc_do_resize(). Prevent such out-of-memory accesses by dropping the selection before the various con_font_set() console handlers are called.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 009e39ae44f4191188aeb6dfbf661b771dbbe515 , < c555cf04684fde39b5b0dd9fd80730030ee10c4a (git)
Affected: 009e39ae44f4191188aeb6dfbf661b771dbbe515 , < e9ba4611ddf676194385506222cce7b0844e708e (git)
Affected: 009e39ae44f4191188aeb6dfbf661b771dbbe515 , < f74b4a41c5d7c9522469917e3072e55d435efd9e (git)
Affected: 009e39ae44f4191188aeb6dfbf661b771dbbe515 , < 1cf1930369c9dc428d827b60260c53271bff3285 (git)
Affected: 009e39ae44f4191188aeb6dfbf661b771dbbe515 , < 989201bb8c00b222235aff04e6200230d29dc7bb (git)
Affected: 009e39ae44f4191188aeb6dfbf661b771dbbe515 , < 2535431ae967ad17585513649625fea7db28d4db (git)
Affected: 009e39ae44f4191188aeb6dfbf661b771dbbe515 , < c904fe03c4bd1f356a58797d39e2a5d0ca15cefc (git)
Affected: 009e39ae44f4191188aeb6dfbf661b771dbbe515 , < 566f9c9f89337792070b5a6062dff448b3e7977f (git)
Affected: e60f8fcce05042e8f8cea25ee81fecc1222114cf (git)
Affected: 5812a9bc9d68a82c2cc839f88e6f7a05093ab39d (git)
Affected: 863ad19fd654c485e3beec3575c4d74a1e74369e (git)
Affected: dbc3fd44f957a39407e889287bf61fa0ef3ecc14 (git)
Affected: 0b2a0a58ad22f9d6dfc641bc5ec46057493f22a5 (git)
Affected: 9f2d48f0745f921040df91bfe8fa7f0339cd7497 (git)
Affected: 3425e397fb23cc2e8e6fb8f5b8226dcb447e84dd (git)
Affected: eeae0a12a16650ff494d5faefa371cd9e7079575 (git)
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    Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 4.9.328 , ≤ 4.9.* (semver)
Unaffected: 4.14.293 , ≤ 4.14.* (semver)
Unaffected: 4.19.258 , ≤ 4.19.* (semver)
Unaffected: 5.4.213 , ≤ 5.4.* (semver)
Unaffected: 5.10.142 , ≤ 5.10.* (semver)
Unaffected: 5.15.66 , ≤ 5.15.* (semver)
Unaffected: 5.19.8 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvt: Clear selection before changing the font\n\nWhen changing the console font with ioctl(KDFONTOP) the new font size\ncan be bigger than the previous font. A previous selection may thus now\nbe outside of the new screen size and thus trigger out-of-bounds\naccesses to graphics memory if the selection is removed in\nvc_do_resize().\n\nPrevent such out-of-memory accesses by dropping the selection before the\nvarious con_font_set() console handlers are called."
        }
      ],
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        "dateUpdated": "2025-12-23T13:26:12.987Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f"
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      "title": "vt: Clear selection before changing the font",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49948",
    "datePublished": "2025-06-18T11:00:12.364Z",
    "dateReserved": "2025-06-18T10:57:27.382Z",
    "dateUpdated": "2025-12-23T13:26:12.987Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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  • 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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