ghsa-fc6c-wh46-2q9r
Vulnerability from github
Published
2024-11-19 18:31
Modified
2024-11-25 21:30
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:

nfs: Fix KMSAN warning in decode_getfattr_attrs()

Fix the following KMSAN warning:

CPU: 1 UID: 0 PID: 7651 Comm: cp Tainted: G B Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009) ===================================================== ===================================================== BUG: KMSAN: uninit-value in decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_generic+0x806/0xb00 nfs4_xdr_dec_getattr+0x1de/0x240 rpcauth_unwrap_resp_decode+0xab/0x100 rpcauth_unwrap_resp+0x95/0xc0 call_decode+0x4ff/0xb50 __rpc_execute+0x57b/0x19d0 rpc_execute+0x368/0x5e0 rpc_run_task+0xcfe/0xee0 nfs4_proc_getattr+0x5b5/0x990 __nfs_revalidate_inode+0x477/0xd00 nfs_access_get_cached+0x1021/0x1cc0 nfs_do_access+0x9f/0xae0 nfs_permission+0x1e4/0x8c0 inode_permission+0x356/0x6c0 link_path_walk+0x958/0x1330 path_lookupat+0xce/0x6b0 filename_lookup+0x23e/0x770 vfs_statx+0xe7/0x970 vfs_fstatat+0x1f2/0x2c0 __se_sys_newfstatat+0x67/0x880 __x64_sys_newfstatat+0xbd/0x120 x64_sys_call+0x1826/0x3cf0 do_syscall_64+0xd0/0x1b0 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The KMSAN warning is triggered in decode_getfattr_attrs(), when calling decode_attr_mdsthreshold(). It appears that fattr->mdsthreshold is not initialized.

Fix the issue by initializing fattr->mdsthreshold to NULL in nfs_fattr_init().

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{
   affected: [],
   aliases: [
      "CVE-2024-53066",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-908",
      ],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2024-11-19T18:15:26Z",
      severity: "MODERATE",
   },
   details: "In the Linux kernel, the following vulnerability has been resolved:\n\nnfs: Fix KMSAN warning in decode_getfattr_attrs()\n\nFix the following KMSAN warning:\n\nCPU: 1 UID: 0 PID: 7651 Comm: cp Tainted: G    B\nTainted: [B]=BAD_PAGE\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009)\n=====================================================\n=====================================================\nBUG: KMSAN: uninit-value in decode_getfattr_attrs+0x2d6d/0x2f90\n decode_getfattr_attrs+0x2d6d/0x2f90\n decode_getfattr_generic+0x806/0xb00\n nfs4_xdr_dec_getattr+0x1de/0x240\n rpcauth_unwrap_resp_decode+0xab/0x100\n rpcauth_unwrap_resp+0x95/0xc0\n call_decode+0x4ff/0xb50\n __rpc_execute+0x57b/0x19d0\n rpc_execute+0x368/0x5e0\n rpc_run_task+0xcfe/0xee0\n nfs4_proc_getattr+0x5b5/0x990\n __nfs_revalidate_inode+0x477/0xd00\n nfs_access_get_cached+0x1021/0x1cc0\n nfs_do_access+0x9f/0xae0\n nfs_permission+0x1e4/0x8c0\n inode_permission+0x356/0x6c0\n link_path_walk+0x958/0x1330\n path_lookupat+0xce/0x6b0\n filename_lookup+0x23e/0x770\n vfs_statx+0xe7/0x970\n vfs_fstatat+0x1f2/0x2c0\n __se_sys_newfstatat+0x67/0x880\n __x64_sys_newfstatat+0xbd/0x120\n x64_sys_call+0x1826/0x3cf0\n do_syscall_64+0xd0/0x1b0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe KMSAN warning is triggered in decode_getfattr_attrs(), when calling\ndecode_attr_mdsthreshold(). It appears that fattr->mdsthreshold is not\ninitialized.\n\nFix the issue by initializing fattr->mdsthreshold to NULL in\nnfs_fattr_init().",
   id: "GHSA-fc6c-wh46-2q9r",
   modified: "2024-11-25T21:30:48Z",
   published: "2024-11-19T18:31:07Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2024-53066",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/25ffd294fef81a7f3cd9528adf21560c04d98747",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/8fc5ea9231af9122d227c9c13f5e578fca48d2e3",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/9b453e8b108a5a93a6e348cf2ba4c9c138314a00",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/9be0a21ae52b3b822d0eec4d14e909ab394f8a92",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/bbfcd261cc068fe1cd02a4e871275074a0daa4e2",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/dc270d7159699ad6d11decadfce9633f0f71c1db",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/f6b2b2b981af8e7d7c62d34143acefa4e1edfe8b",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/stable/c/f749cb60a01f8391c760a1d6ecd938cadacf9549",
      },
   ],
   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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