CVE-2024-26870

In the Linux kernel, the following vulnerability has been resolved: NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102 A call to listxattr() with a buffer size = 0 returns the actual size of the buffer needed for a subsequent call. When size > 0, nfs4_listxattr() does not return an error because either generic_listxattr() or nfs4_listxattr_nfs4_label() consumes exactly all the bytes then size is 0 when calling nfs4_listxattr_nfs4_user() which then triggers the following kernel BUG: [ 99.403778] kernel BUG at mm/usercopy.c:102! [ 99.404063] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP [ 99.408463] CPU: 0 PID: 3310 Comm: python3 Not tainted 6.6.0-61.fc40.aarch64 #1 [ 99.415827] Call trace: [ 99.415985] 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] el0_svc_common.constprop.0+0x48/0xf0 [ 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] Code: aa0003e3 d000a3e0 91310000 97f49bdb (d4210000) Issue is reproduced when generic_listxattr() returns 'system.nfs4_acl', thus calling lisxattr() with size = 16 will trigger the bug. Add check on nfs4_listxattr() to return ERANGE error when it is called with size > 0 and the return value is greater than size.
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

History

30 Apr 2025, 14:24

Type Values Removed Values Added
CWE NVD-CWE-noinfo
CVSS v2 : unknown
v3 : unknown
v2 : unknown
v3 : 5.5
References () https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb - () https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb - Patch
References () https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf - () https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf - Patch
References () https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65 - () https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65 - Patch
References () https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b - () https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b - Patch
References () https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768 - () https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768 - Patch
References () https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf - () https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf - Patch
References () https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a - () https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a - Patch
References () https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html - () https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html - Mailing List
First Time Debian debian Linux
Linux linux Kernel
Debian
Linux
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

21 Nov 2024, 09:03

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html -
References () https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb - () https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb -
References () https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf - () https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf -
References () https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65 - () https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65 -
References () https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b - () https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b -
References () https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768 - () https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768 -
References () https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf - () https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf -
References () https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a - () https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a -

05 Nov 2024, 10:15

Type Values Removed Values Added
References
  • {'url': 'https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html', 'source': '416baaa9-dc9f-4396-8d5f-8c081fb06d67'}

25 Jun 2024, 23:15

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html -
Summary
  • (es) 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 tamaño de búfer = 0 devuelve el tamaño real del búfer necesario para un convocatoria posterior. Cuando el tamaño > 0, nfs4_listxattr() no devuelve un error porque generic_listxattr() o nfs4_listxattr_nfs4_label() consume exactamente todos los bytes, entonces el tamaño 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] Código: aa0003e3 d000a3e0 91310000 97f49bdb (d42 10000) El problema se reproduce cuando generic_listxattr() devuelve 'system.nfs4_acl', llamando así a lisxattr() con tamaño = 16 activará el error. Agregue verificación en nfs4_listxattr() para devolver el error ERANGE cuando se llama con un tamaño > 0 y el valor de retorno es mayor que el tamaño.

17 Apr 2024, 12:48

Type Values Removed Values Added
New CVE

Information

Published : 2024-04-17 11:15

Updated : 2025-04-30 14:24


NVD link : CVE-2024-26870

Mitre link : CVE-2024-26870

CVE.ORG link : CVE-2024-26870


JSON object : View

Products Affected

debian

  • debian_linux

linux

  • linux_kernel