ghsa-8f4h-jjh9-fxrx
Vulnerability from github
Published
2024-08-26 12:31
Modified
2025-05-02 09:30
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

jfs: Fix shift-out-of-bounds in dbDiscardAG

When searching for the next smaller log2 block, BLKSTOL2() returned 0, causing shift exponent -1 to be negative.

This patch fixes the issue by exiting the loop directly when negative shift is found.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-44938"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-26T12:15:05Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: Fix shift-out-of-bounds in dbDiscardAG\n\nWhen searching for the next smaller log2 block, BLKSTOL2() returned 0,\ncausing shift exponent -1 to be negative.\n\nThis patch fixes the issue by exiting the loop directly when negative\nshift is found.",
  "id": "GHSA-8f4h-jjh9-fxrx",
  "modified": "2025-05-02T09:30:27Z",
  "published": "2024-08-26T12:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-44938"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/234e6ea0855cdb5673d54ecaf7dc5c78f3e84630"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4de2c04c3acd5b84f50b0d2f8f09e9b2f42374b9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7063b80268e2593e58bee8a8d709c2f3ff93e2f2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bb7c605a754823b86dd74f6537ccb9d38a9dec5a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd04a149e3a29e7f71b7956ed41dba34e42d539e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f650148b43949ca9e37e820804bb6026fff404f3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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