cve-2024-26870
Vulnerability from cvelistv5
Published
2024-04-17 10:27
Modified
2024-11-05 09:17
Severity ?
Summary
NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102\n\nA call to listxattr() with a buffer size = 0 returns the actual\nsize of the buffer needed for a subsequent call. When size \u003e 0,\nnfs4_listxattr() does not return an error because either\ngeneric_listxattr() or nfs4_listxattr_nfs4_label() consumes\nexactly all the bytes then size is 0 when calling\nnfs4_listxattr_nfs4_user() which then triggers the following\nkernel BUG:\n\n  [   99.403778] kernel BUG at mm/usercopy.c:102!\n  [   99.404063] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\n  [   99.408463] CPU: 0 PID: 3310 Comm: python3 Not tainted 6.6.0-61.fc40.aarch64 #1\n  [   99.415827] Call trace:\n  [   99.415985]  usercopy_abort+0x70/0xa0\n  [   99.416227]  __check_heap_object+0x134/0x158\n  [   99.416505]  check_heap_object+0x150/0x188\n  [   99.416696]  __check_object_size.part.0+0x78/0x168\n  [   99.416886]  __check_object_size+0x28/0x40\n  [   99.417078]  listxattr+0x8c/0x120\n  [   99.417252]  path_listxattr+0x78/0xe0\n  [   99.417476]  __arm64_sys_listxattr+0x28/0x40\n  [   99.417723]  invoke_syscall+0x78/0x100\n  [   99.417929]  el0_svc_common.constprop.0+0x48/0xf0\n  [   99.418186]  do_el0_svc+0x24/0x38\n  [   99.418376]  el0_svc+0x3c/0x110\n  [   99.418554]  el0t_64_sync_handler+0x120/0x130\n  [   99.418788]  el0t_64_sync+0x194/0x198\n  [   99.418994] Code: aa0003e3 d000a3e0 91310000 97f49bdb (d4210000)\n\nIssue is reproduced when generic_listxattr() returns \u0027system.nfs4_acl\u0027,\nthus calling lisxattr() with size = 16 will trigger the bug.\n\nAdd check on nfs4_listxattr() to return ERANGE error when it is\ncalled with size \u003e 0 and the return value is greater than size."
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    "cveId": "CVE-2024-26870",
    "datePublished": "2024-04-17T10:27:30.756Z",
    "dateReserved": "2024-02-19T14:20:24.184Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26870\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-17T11:15:09.460\",\"lastModified\":\"2024-11-05T10:15:56.680\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nNFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102\\n\\nA call to listxattr() with a buffer size = 0 returns the actual\\nsize of the buffer needed for a subsequent call. When size \u003e 0,\\nnfs4_listxattr() does not return an error because either\\ngeneric_listxattr() or nfs4_listxattr_nfs4_label() consumes\\nexactly all the bytes then size is 0 when calling\\nnfs4_listxattr_nfs4_user() which then triggers the following\\nkernel BUG:\\n\\n  [   99.403778] kernel BUG at mm/usercopy.c:102!\\n  [   99.404063] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\\n  [   99.408463] CPU: 0 PID: 3310 Comm: python3 Not tainted 6.6.0-61.fc40.aarch64 #1\\n  [   99.415827] Call trace:\\n  [   99.415985]  usercopy_abort+0x70/0xa0\\n  [   99.416227]  __check_heap_object+0x134/0x158\\n  [   99.416505]  check_heap_object+0x150/0x188\\n  [   99.416696]  __check_object_size.part.0+0x78/0x168\\n  [   99.416886]  __check_object_size+0x28/0x40\\n  [   99.417078]  listxattr+0x8c/0x120\\n  [   99.417252]  path_listxattr+0x78/0xe0\\n  [   99.417476]  __arm64_sys_listxattr+0x28/0x40\\n  [   99.417723]  invoke_syscall+0x78/0x100\\n  [   99.417929]  el0_svc_common.constprop.0+0x48/0xf0\\n  [   99.418186]  do_el0_svc+0x24/0x38\\n  [   99.418376]  el0_svc+0x3c/0x110\\n  [   99.418554]  el0t_64_sync_handler+0x120/0x130\\n  [   99.418788]  el0t_64_sync+0x194/0x198\\n  [   99.418994] Code: aa0003e3 d000a3e0 91310000 97f49bdb (d4210000)\\n\\nIssue is reproduced when generic_listxattr() returns \u0027system.nfs4_acl\u0027,\\nthus calling lisxattr() with size = 16 will trigger the bug.\\n\\nAdd check on nfs4_listxattr() to return ERANGE error when it is\\ncalled with size \u003e 0 and the return value is greater than size.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSv4.2: corrige el ERROR del kernel nfs4_listxattr en mm/usercopy.c:102 Una llamada a listxattr() con un tama\u00f1o de b\u00fafer = 0 devuelve el tama\u00f1o real del b\u00fafer necesario para un convocatoria posterior. Cuando el tama\u00f1o \u0026gt; 0, nfs4_listxattr() no devuelve un error porque generic_listxattr() o nfs4_listxattr_nfs4_label() consume exactamente todos los bytes, entonces el tama\u00f1o es 0 al llamar a nfs4_listxattr_nfs4_user(), lo que luego activa el siguiente ERROR del kernel: [99.403778] ERROR del kernel en mm/usercopy.c:102! [99.404063] Error interno: Ups - ERROR: 00000000f2000800 [#1] SMP [99.408463] CPU: 0 PID: 3310 Comm: python3 No contaminado 6.6.0-61.fc40.aarch64 #1 [ 99.415827] Seguimiento de llamadas: [ 99.41 5985] usercopy_abort+0x70/0xa0 [ 99.416227] __check_heap_object+0x134/0x158 [ 99.416505] check_heap_object+0x150/0x188 [ 99.416696] __check_object_size.part.0+0x78/0x168 [ 99.416886 ] __check_object_size+0x28/0x40 [ 99.417078] listxattr+0x8c/0x120 [ 99.417252] path_listxattr+0x78/0xe0 [ 99.417476] __arm64_sys_listxattr+0x28/0x40 [ 99.417723] invoke_syscall+0x78/0x100 [ 99.417929] 48/0xf0 [ 99.418186] do_el0_svc+0x24/0x38 [ 99.418376] el0_svc+0x3c/ 0x110 [ 99.418554] el0t_64_sync_handler+0x120/0x130 [ 99.418788] el0t_64_sync+0x194/0x198 [ 99.418994] C\u00f3digo: aa0003e3 d000a3e0 91310000 97f49bdb (d42 10000) El problema se reproduce cuando generic_listxattr() devuelve \u0027system.nfs4_acl\u0027, llamando as\u00ed a lisxattr() con tama\u00f1o = 16 activar\u00e1 el error. Agregue verificaci\u00f3n en nfs4_listxattr() para devolver el error ERANGE cuando se llama con un tama\u00f1o \u0026gt; 0 y el valor de retorno es mayor que el tama\u00f1o.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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