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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb	Patch
https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf	Patch
https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65	Patch
https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b	Patch
https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768	Patch
https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf	Patch
https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a	Patch
https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb	Patch
https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf	Patch
https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65	Patch
https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b	Patch
https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768	Patch
https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf	Patch
https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a	Patch
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html	Mailing List

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
First Time		Debian debian Linux Linux linux Kernel Debian Linux
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
CWE		NVD-CWE-noinfo
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
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
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.
References		() https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html -

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

CWE

NVD-CWE-noinfo

{"id": "CVE-2024-26870", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-04-17T11:15:09.460", "references": [{"url": "https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": ["Mailing List"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "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 > 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 'system.nfs4_acl',\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 > 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 > 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 'system.nfs4_acl', 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 > 0 y el valor de retorno es mayor que el tama\u00f1o."}], "lastModified": "2025-04-30T14:24:09.883", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A73BE1C2-BC30-4A60-80F0-7975135EB641", "versionEndExcluding": "5.10.214", "versionStartIncluding": "5.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ACB69438-845D-4E3C-B114-3140611F9C0B", "versionEndExcluding": "5.15.153", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "121A07F6-F505-4C47-86BF-9BB6CC7B6C19", "versionEndExcluding": "6.1.83", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E00814DC-0BA7-431A-9926-80FEB4A96C68", "versionEndExcluding": "6.6.23", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9B95D3A6-E162-47D5-ABFC-F3FA74FA7CFD", "versionEndExcluding": "6.7.11", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "543A75FF-25B8-4046-A514-1EA8EDD87AB1", "versionEndExcluding": "6.8.2", "versionStartIncluding": "6.8"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}

5.5 /10