ghsa-ppw5-g3vp-9xx2
Vulnerability from github
Published
2024-10-21 18:30
Modified
2024-11-08 18:30
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Details

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

jfs: Fix uninit-value access of new_ea in ea_buffer

syzbot reports that lzo1x_1_do_compress is using uninit-value:

===================================================== BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x19f9/0x2510 lib/lzo/lzo1x_compress.c:178

...

Uninit was stored to memory at: ea_put fs/jfs/xattr.c:639 [inline]

...

Local variable ea_buf created at: __jfs_setxattr+0x5d/0x1ae0 fs/jfs/xattr.c:662 __jfs_xattr_set+0xe6/0x1f0 fs/jfs/xattr.c:934

=====================================================

The reason is ea_buf->new_ea is not initialized properly.

Fix this by using memset to empty its content at the beginning in ea_get().

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{
  "affected": [],
  "aliases": [
    "CVE-2024-49900"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-908"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T18:15:12Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: Fix uninit-value access of new_ea in ea_buffer\n\nsyzbot reports that lzo1x_1_do_compress is using uninit-value:\n\n=====================================================\nBUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x19f9/0x2510 lib/lzo/lzo1x_compress.c:178\n\n...\n\nUninit was stored to memory at:\n ea_put fs/jfs/xattr.c:639 [inline]\n\n...\n\nLocal variable ea_buf created at:\n __jfs_setxattr+0x5d/0x1ae0 fs/jfs/xattr.c:662\n __jfs_xattr_set+0xe6/0x1f0 fs/jfs/xattr.c:934\n\n=====================================================\n\nThe reason is ea_buf-\u003enew_ea is not initialized properly.\n\nFix this by using memset to empty its content at the beginning\nin ea_get().",
  "id": "GHSA-ppw5-g3vp-9xx2",
  "modified": "2024-11-08T18:30:45Z",
  "published": "2024-10-21T18:30:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-49900"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b59ffad47db1c46af25ccad157bb3b25147c35c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6041536d18c5f51a84bc37cd568cbab61870031e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7b24d41d47a6805c45378debf8bd115675d41da8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c244d5b48284a770d96ff703df2dfeadf804a73"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ad8b531de79c348bcb8133e7f5e827b884226af"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b1dcf25c26d42e4a68c4725ce52a0543c7878cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c076b3746224982eebdba5c9e4b1467e146c0d64"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d7444f91a9f93eaa48827087ed0f3381c194181d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dac398ed272a378d2f42ac68ae408333a51baf52"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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