GHSA-9MVV-JGF2-GJ5C

Vulnerability from github – Published: 2024-05-01 06:31 – Updated: 2025-12-23 03:30
VLAI
Details

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

nilfs2: prevent kernel bug at submit_bh_wbc()

Fix a bug where nilfs_get_block() returns a successful status when searching and inserting the specified block both fail inconsistently. If this inconsistent behavior is not due to a previously fixed bug, then an unexpected race is occurring, so return a temporary error -EAGAIN instead.

This prevents callers such as __block_write_begin_int() from requesting a read into a buffer that is not mapped, which would cause the BUG_ON check for the BH_Mapped flag in submit_bh_wbc() to fail.

Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2024-26955"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-01T06:15:11Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: prevent kernel bug at submit_bh_wbc()\n\nFix a bug where nilfs_get_block() returns a successful status when\nsearching and inserting the specified block both fail inconsistently.  If\nthis inconsistent behavior is not due to a previously fixed bug, then an\nunexpected race is occurring, so return a temporary error -EAGAIN instead.\n\nThis prevents callers such as __block_write_begin_int() from requesting a\nread into a buffer that is not mapped, which would cause the BUG_ON check\nfor the BH_Mapped flag in submit_bh_wbc() to fail.",
  "id": "GHSA-9mvv-jgf2-gj5c",
  "modified": "2025-12-23T03:30:17Z",
  "published": "2024-05-01T06:31:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26955"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c8aa4cfda4e4adb15d5b6536d155eca9c9cd44c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/192e9f9078c96be30b31c4b44d6294b24520fce5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/269cdf353b5bdd15f1a079671b0f889113865f20"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/32eaee72e96590a75445c8a6c7c1057673b47e07"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48d443d200237782dc82e6b60663ec414ef02e39"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76ffbe911e2798c7296968f5fd72f7bf67207a8d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/91e4c4595fae5e87069e44687ae879091783c183"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca581d237f3b8539c044205bb003de71d75d227c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f0fe7ad5aff4f0fcf988913313c497de85f1e186"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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