CVE-2024-26870 (GCVE-0-2024-26870)

Vulnerability from cvelistv5 – Published: 2024-04-17 10:27 – Updated: 2026-05-12 11:49
VLAI?
Title
NFSv4.2: fix nfs4_listxattr kernel BUG at mm/usercopy.c:102
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 012a211abd5db098094ce429de5f046368391e68 , < 4403438eaca6e91f02d272211c4d6b045092396b (git)
Affected: 012a211abd5db098094ce429de5f046368391e68 , < 9d52865ff28245fc2134da9f99baff603a24407a (git)
Affected: 012a211abd5db098094ce429de5f046368391e68 , < 06e828b3f1b206de08ef520fc46a40b22e1869cb (git)
Affected: 012a211abd5db098094ce429de5f046368391e68 , < 79cdcc765969d23f4e3d6ea115660c3333498768 (git)
Affected: 012a211abd5db098094ce429de5f046368391e68 , < 80365c9f96015bbf048fdd6c8705d3f8770132bf (git)
Affected: 012a211abd5db098094ce429de5f046368391e68 , < 23bfecb4d852751d5e403557dd500bb563313baf (git)
Affected: 012a211abd5db098094ce429de5f046368391e68 , < 251a658bbfceafb4d58c76b77682c8bf7bcfad65 (git)
Create a notification for this product.
Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 5.10.214 , ≤ 5.10.* (semver)
Unaffected: 5.15.153 , ≤ 5.15.* (semver)
Unaffected: 6.1.83 , ≤ 6.1.* (semver)
Unaffected: 6.6.23 , ≤ 6.6.* (semver)
Unaffected: 6.7.11 , ≤ 6.7.* (semver)
Unaffected: 6.8.2 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "cveId": "CVE-2024-26870",
    "datePublished": "2024-04-17T10:27:30.756Z",
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      "date": "2026-05-20",
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      "percentile": "0.07109"
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      "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.\"}]",
      "id": "CVE-2024-26870",
      "lastModified": "2024-11-21T09:03:15.490",
      "published": "2024-04-17T11:15:09.460",
      "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\"}, {\"url\": \"https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26870\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-17T11:15:09.460\",\"lastModified\":\"2026-05-12T12:16:22.147\",\"vulnStatus\":\"Modified\",\"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\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.9\",\"versionEndExcluding\":\"5.10.214\",\"matchCriteriaId\":\"A73BE1C2-BC30-4A60-80F0-7975135EB641\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.153\",\"matchCriteriaId\":\"ACB69438-845D-4E3C-B114-3140611F9C0B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.83\",\"matchCriteriaId\":\"121A07F6-F505-4C47-86BF-9BB6CC7B6C19\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.23\",\"matchCriteriaId\":\"E00814DC-0BA7-431A-9926-80FEB4A96C68\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.7.11\",\"matchCriteriaId\":\"9B95D3A6-E162-47D5-ABFC-F3FA74FA7CFD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.8\",\"versionEndExcluding\":\"6.8.2\",\"matchCriteriaId\":\"543A75FF-25B8-4046-A514-1EA8EDD87AB1\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/06e828b3f1b206de08ef520fc46a40b22e1869cb\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/23bfecb4d852751d5e403557dd500bb563313baf\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/251a658bbfceafb4d58c76b77682c8bf7bcfad65\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4403438eaca6e91f02d272211c4d6b045092396b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/79cdcc765969d23f4e3d6ea115660c3333498768\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/80365c9f96015bbf048fdd6c8705d3f8770132bf\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9d52865ff28245fc2134da9f99baff603a24407a\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-265688.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
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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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.214\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.153\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.83\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.23\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.11\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.2\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"5.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:05:43.583Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26870\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-12T11:49:46.342Z\", \"dateReserved\": \"2024-02-19T14:20:24.184Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-17T10:27:30.756Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.