{
  "cveId": "CVE-2026-93235",
  "url": "https://patchblox.com/security/cve/CVE-2026-93235",
  "summary": "CVE-2026-93235 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-93235, released September 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to zero post-EOF data when extending f...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to zero post-EOF data when extending file size  generic/794  4s ... - output mismatch (see /share/git/fstests/results//generic/794.out.bad)     --- tests/generic/794.out   2026-06-12 08:46:32.766426241 \u002B0800     \u002B\u002B\u002B /share/git/fstests/results//generic/794.out.bad 2026-07-05 18:32:55.000000000 \u002B0800     @@ -1,4 \u002B1,16 @@      QA output created by 794      append_write     \u002BFAIL: non-zero data in gap [4080,4096) after shutdown\u002Bremount     \u002B000000 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  \u003EZZZZZZZZZZZZZZZZ\u003C     \u002B*     \u002B001000      truncate_up     ...     (Run \u0027diff -u /share/git/fstests/tests/generic/794.out /share/git/fstests/results//generic/794.out.bad\u0027  to see the entire diff) Ran: generic/794 Failures: generic/794 Failed 1 of 1 tests  Steps of generic/794: 1. write 4096 bytes to file w/ 0x5a 2. use fiemap to get PBA of first block in file 3. truncate file to 4080 4. umount; write 4096 bytes to file w/ 0x5a directly via PBA; mount 5. extend filesize via    a) append 4096 from offset 4096, or    b) truncate 8192, or    c) fallocate 4096 from offset 4096 6. verify the gap is zeroed in memory [4080,4096) 7. sync range 4096 from offset 4096; shutdown -f (flush meta before shutdown) 8. umount; mount; verify [4080,4096) is zeroed or not.  When extending file size (e.g. via truncate, fallocate, or write) across an unaligned EOF boundary, we need to ensure that post-EOF data in the partial page is zeroed out in pagecache and marked dirty, then writeback the cache to persist zeroed data before committing inode w/ updated i_size.  This help to prevent stale disk data beyond the previous EOF from being exposed after remounting or crash recovery.  Since f2fs is a LFS filesystem, we only support direct write via PBA in pinfile, and pinfile has section-aligned filesize, so in Android, there should no problem, but for other usage in different environment, let\u0027s fix this w/ fsync_mode=strict mount option.",
  "published": "2026-09-24T16:17:19Z",
  "severity": "",
  "epss": 0.00209,
  "epssPercentile": 0.11126,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.111-1",
      "fix": "DEBIAN-CVE-2026-93235",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93235",
      "released": "2026-09-24T19:30:44Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-93235",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93235",
      "released": "2026-09-24T19:30:44Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.111-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-93235",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-93235",
      "released": "2026-09-24T19:30:44Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}