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GHSA-V9MC-99CX-C56M

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-15 06:32
VLAI
Details

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

ext2: fix ignored return value of generic_write_sync()

Fix ext2_dio_write_iter() to propagate the error returned by generic_write_sync() instead of silently discarding it, which could cause write(2) to return success to userspace on O_SYNC/O_DSYNC files even when the sync failed.

The correct pattern, already used in ext2_dax_write_iter() in the same file and in ext4, xfs, f2fs among others, is: if (ret > 0) ret = generic_write_sync(iocb, ret);

Found by Linux Verification Center (linuxtesting.org) with SVACE.

[JK: Reflect also filemap_write_and_wait() return value]

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74362"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:37Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next2: fix ignored return value of generic_write_sync()\n\nFix ext2_dio_write_iter() to propagate the error returned by\ngeneric_write_sync() instead of silently discarding it, which could\ncause write(2) to return success to userspace on O_SYNC/O_DSYNC files\neven when the sync failed.\n\nThe correct pattern, already used in ext2_dax_write_iter() in the same\nfile and in ext4, xfs, f2fs among others, is:\n    if (ret \u003e 0)\n        ret = generic_write_sync(iocb, ret);\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.\n\n[JK: Reflect also filemap_write_and_wait() return value]",
  "id": "GHSA-v9mc-99cx-c56m",
  "modified": "2026-08-15T06:32:31Z",
  "published": "2026-08-15T06:32:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74362"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8990dbb7065b0b002b1e58b9091a5b61f5e94dbe"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d70b3973020e59845c0bdad90e0b9c2295fd493"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a4659be0bc7cb1856ffb15b67f903229ae8891ec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b6bc07e49a5fbb335f56eb90cd63dec6584c77d3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ffa974b2f50ad8b911b9066d7aed84ad0afabcdb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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