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().

Show details on source website

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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->new_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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