{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "fbfa2cc58d5363f780f4f2ad0243a47185c2bb2a"
            },
            {
              "fixed": "6882d458d2e403f6ba7b45542dd31a6b7531eb2e"
            },
            {
              "fixed": "32c7f11a24268ba8d3bb50ea7f54d33f698cd253"
            },
            {
              "fixed": "91ec55ddc097ccddd25ffb95a3d079b2ef362372"
            },
            {
              "fixed": "c42608c09b6b5d5967bf211c255914c068c2cde1"
            },
            {
              "fixed": "5eced87b7d19dbc76ebdddaf322046f9ac582fcb"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.8.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93235.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to zero post-EOF data when extending file size\n\ngeneric/794  4s ... - output mismatch (see /share/git/fstests/results//generic/794.out.bad)\n    --- tests/generic/794.out   2026-06-12 08:46:32.766426241 +0800\n    +++ /share/git/fstests/results//generic/794.out.bad 2026-07-05 18:32:55.000000000 +0800\n    @@ -1,4 +1,16 @@\n     QA output created by 794\n     append_write\n    +FAIL: non-zero data in gap [4080,4096) after shutdown+remount\n    +000000 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  \u003eZZZZZZZZZZZZZZZZ\u003c\n    +*\n    +001000\n     truncate_up\n    ...\n    (Run 'diff -u /share/git/fstests/tests/generic/794.out /share/git/fstests/results//generic/794.out.bad'  to see the entire diff)\nRan: generic/794\nFailures: generic/794\nFailed 1 of 1 tests\n\nSteps of generic/794:\n1. write 4096 bytes to file w/ 0x5a\n2. use fiemap to get PBA of first block in file\n3. truncate file to 4080\n4. umount; write 4096 bytes to file w/ 0x5a directly via PBA; mount\n5. extend filesize via\n   a) append 4096 from offset 4096, or\n   b) truncate 8192, or\n   c) fallocate 4096 from offset 4096\n6. verify the gap is zeroed in memory [4080,4096)\n7. sync range 4096 from offset 4096; shutdown -f (flush meta before shutdown)\n8. umount; mount; verify [4080,4096) is zeroed or not.\n\nWhen extending file size (e.g. via truncate, fallocate, or write) across an\nunaligned EOF boundary, we need to ensure that post-EOF data in the partial\npage is zeroed out in pagecache and marked dirty, then writeback the cache to\npersist zeroed data before committing inode w/ updated i_size.\n\nThis help to prevent stale disk data beyond the previous EOF from being exposed\nafter remounting or crash recovery.\n\nSince f2fs is a LFS filesystem, we only support direct write via PBA in pinfile,\nand pinfile has section-aligned filesize, so in Android, there should no problem,\nbut for other usage in different environment, let's fix this w/ fsync_mode=strict\nmount option.",
  "id": "CVE-2026-93235",
  "modified": "2026-09-26T03:30:59.935185341Z",
  "published": "2026-09-24T15:33:33.241Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32c7f11a24268ba8d3bb50ea7f54d33f698cd253"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5eced87b7d19dbc76ebdddaf322046f9ac582fcb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6882d458d2e403f6ba7b45542dd31a6b7531eb2e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91ec55ddc097ccddd25ffb95a3d079b2ef362372"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c42608c09b6b5d5967bf211c255914c068c2cde1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93235.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93235"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "f2fs: fix to zero post-EOF data when extending file size"
}