GHSA-MGG3-9X9V-HWXX

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-04-28 18:30
VLAI?
Details

In the Linux kernel, the following vulnerability has been resolved:

erofs: set fileio bio failed in short read case

For file-backed mount, IO requests are handled by vfs_iocb_iter_read(). However, it can be interrupted by SIGKILL, returning the number of bytes actually copied. Unused folios in bio are unexpectedly marked as uptodate.

vfs_read filemap_read filemap_get_pages filemap_readahead erofs_fileio_readahead erofs_fileio_rq_submit vfs_iocb_iter_read filemap_read filemap_get_pages <= detect signal erofs_fileio_ki_complete <= set all folios uptodate

This patch addresses this by setting short read bio with an error directly.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-31514"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:50Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: set fileio bio failed in short read case\n\nFor file-backed mount, IO requests are handled by vfs_iocb_iter_read().\nHowever, it can be interrupted by SIGKILL, returning the number of\nbytes actually copied. Unused folios in bio are unexpectedly marked\nas uptodate.\n\n  vfs_read\n    filemap_read\n      filemap_get_pages\n        filemap_readahead\n          erofs_fileio_readahead\n            erofs_fileio_rq_submit\n              vfs_iocb_iter_read\n                filemap_read\n                  filemap_get_pages  \u003c= detect signal\n              erofs_fileio_ki_complete  \u003c= set all folios uptodate\n\nThis patch addresses this by setting short read bio with an error\ndirectly.",
  "id": "GHSA-mgg3-9x9v-hwxx",
  "modified": "2026-04-28T18:30:28Z",
  "published": "2026-04-22T15:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31514"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a5f23ef5431639db1ac3a0b274aef3a84cc413c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5cf3972c8221abdb1b464a14ccf8103d840b9085"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1ba7d6b3cd1757b108d7b6856c92ae661d6c323"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eade54040384f54b7fb330e4b0975c5734850b3c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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