CVE-2026-31514 (GCVE-0-2026-31514)
Vulnerability from cvelistv5
Published
2026-04-22 13:54
Modified
2026-10-23 08:20
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: ce63cb62d794c98c7631c2296fa845f2a8d0a4a1
Version: ce63cb62d794c98c7631c2296fa845f2a8d0a4a1
Version: ce63cb62d794c98c7631c2296fa845f2a8d0a4a1
Version: ce63cb62d794c98c7631c2296fa845f2a8d0a4a1
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/erofs/fileio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d1ba7d6b3cd1757b108d7b6856c92ae661d6c323",
              "status": "affected",
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              "versionType": "git"
            },
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              "lessThan": "5cf3972c8221abdb1b464a14ccf8103d840b9085",
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              "versionType": "git"
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/erofs/fileio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.80",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.11",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-23T08:20:15.576Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d1ba7d6b3cd1757b108d7b6856c92ae661d6c323"
        },
        {
          "url": "https://git.kernel.org/stable/c/5cf3972c8221abdb1b464a14ccf8103d840b9085"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a5f23ef5431639db1ac3a0b274aef3a84cc413c"
        },
        {
          "url": "https://git.kernel.org/stable/c/eade54040384f54b7fb330e4b0975c5734850b3c"
        }
      ],
      "title": "erofs: set fileio bio failed in short read case",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31514",
    "datePublished": "2026-04-22T13:54:31.531Z",
    "dateReserved": "2026-03-09T15:48:24.107Z",
    "dateUpdated": "2026-10-23T08:20:15.576Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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