cve-2024-45000
Vulnerability from cvelistv5
Published
2024-09-04 19:54
Modified
2024-12-19 09:19
Severity ?
EPSS score ?
Summary
fs/netfs/fscache_cookie: add missing "n_accesses" check
References
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2024-45000",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-09-04T20:18:51.783797Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-09-04T20:19:07.787Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/netfs/fscache_cookie.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "b8a50877f68efdcc0be3fcc5116e00c31b90e45b",
"status": "affected",
"version": "12bb21a29c19aae50cfad4e2bb5c943108f34a7d",
"versionType": "git"
},
{
"lessThan": "dfaa39b05a6cf34a16c525a2759ee6ab26b5fef6",
"status": "affected",
"version": "12bb21a29c19aae50cfad4e2bb5c943108f34a7d",
"versionType": "git"
},
{
"lessThan": "0a4d41fa14b2a0efd40e350cfe8ec6a4c998ac1d",
"status": "affected",
"version": "12bb21a29c19aae50cfad4e2bb5c943108f34a7d",
"versionType": "git"
},
{
"lessThan": "f71aa06398aabc2e3eaac25acdf3d62e0094ba70",
"status": "affected",
"version": "12bb21a29c19aae50cfad4e2bb5c943108f34a7d",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/netfs/fscache_cookie.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"lessThan": "5.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.107",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.48",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.10.*",
"status": "unaffected",
"version": "6.10.7",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.11",
"versionType": "original_commit_for_fix"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/netfs/fscache_cookie: add missing \"n_accesses\" check\n\nThis fixes a NULL pointer dereference bug due to a data race which\nlooks like this:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000008\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] SMP PTI\n CPU: 33 PID: 16573 Comm: kworker/u97:799 Not tainted 6.8.7-cm4all1-hp+ #43\n Hardware name: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 10/17/2018\n Workqueue: events_unbound netfs_rreq_write_to_cache_work\n RIP: 0010:cachefiles_prepare_write+0x30/0xa0\n Code: 57 41 56 45 89 ce 41 55 49 89 cd 41 54 49 89 d4 55 53 48 89 fb 48 83 ec 08 48 8b 47 08 48 83 7f 10 00 48 89 34 24 48 8b 68 20 \u003c48\u003e 8b 45 08 4c 8b 38 74 45 49 8b 7f 50 e8 4e a9 b0 ff 48 8b 73 10\n RSP: 0018:ffffb4e78113bde0 EFLAGS: 00010286\n RAX: ffff976126be6d10 RBX: ffff97615cdb8438 RCX: 0000000000020000\n RDX: ffff97605e6c4c68 RSI: ffff97605e6c4c60 RDI: ffff97615cdb8438\n RBP: 0000000000000000 R08: 0000000000278333 R09: 0000000000000001\n R10: ffff97605e6c4600 R11: 0000000000000001 R12: ffff97605e6c4c68\n R13: 0000000000020000 R14: 0000000000000001 R15: ffff976064fe2c00\n FS: 0000000000000000(0000) GS:ffff9776dfd40000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000008 CR3: 000000005942c002 CR4: 00000000001706f0\n Call Trace:\n \u003cTASK\u003e\n ? __die+0x1f/0x70\n ? page_fault_oops+0x15d/0x440\n ? search_module_extables+0xe/0x40\n ? fixup_exception+0x22/0x2f0\n ? exc_page_fault+0x5f/0x100\n ? asm_exc_page_fault+0x22/0x30\n ? cachefiles_prepare_write+0x30/0xa0\n netfs_rreq_write_to_cache_work+0x135/0x2e0\n process_one_work+0x137/0x2c0\n worker_thread+0x2e9/0x400\n ? __pfx_worker_thread+0x10/0x10\n kthread+0xcc/0x100\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x30/0x50\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1b/0x30\n \u003c/TASK\u003e\n Modules linked in:\n CR2: 0000000000000008\n ---[ end trace 0000000000000000 ]---\n\nThis happened because fscache_cookie_state_machine() was slow and was\nstill running while another process invoked fscache_unuse_cookie();\nthis led to a fscache_cookie_lru_do_one() call, setting the\nFSCACHE_COOKIE_DO_LRU_DISCARD flag, which was picked up by\nfscache_cookie_state_machine(), withdrawing the cookie via\ncachefiles_withdraw_cookie(), clearing cookie-\u003ecache_priv.\n\nAt the same time, yet another process invoked\ncachefiles_prepare_write(), which found a NULL pointer in this code\nline:\n\n struct cachefiles_object *object = cachefiles_cres_object(cres);\n\nThe next line crashes, obviously:\n\n struct cachefiles_cache *cache = object-\u003evolume-\u003ecache;\n\nDuring cachefiles_prepare_write(), the \"n_accesses\" counter is\nnon-zero (via fscache_begin_operation()). The cookie must not be\nwithdrawn until it drops to zero.\n\nThe counter is checked by fscache_cookie_state_machine() before\nswitching to FSCACHE_COOKIE_STATE_RELINQUISHING and\nFSCACHE_COOKIE_STATE_WITHDRAWING (in \"case\nFSCACHE_COOKIE_STATE_FAILED\"), but not for\nFSCACHE_COOKIE_STATE_LRU_DISCARDING (\"case\nFSCACHE_COOKIE_STATE_ACTIVE\").\n\nThis patch adds the missing check. With a non-zero access counter,\nthe function returns and the next fscache_end_cookie_access() call\nwill queue another fscache_cookie_state_machine() call to handle the\nstill-pending FSCACHE_COOKIE_DO_LRU_DISCARD."
}
],
"providerMetadata": {
"dateUpdated": "2024-12-19T09:19:58.235Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/b8a50877f68efdcc0be3fcc5116e00c31b90e45b"
},
{
"url": "https://git.kernel.org/stable/c/dfaa39b05a6cf34a16c525a2759ee6ab26b5fef6"
},
{
"url": "https://git.kernel.org/stable/c/0a4d41fa14b2a0efd40e350cfe8ec6a4c998ac1d"
},
{
"url": "https://git.kernel.org/stable/c/f71aa06398aabc2e3eaac25acdf3d62e0094ba70"
}
],
"title": "fs/netfs/fscache_cookie: add missing \"n_accesses\" check",
"x_generator": {
"engine": "bippy-5f407fcff5a0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-45000",
"datePublished": "2024-09-04T19:54:44.273Z",
"dateReserved": "2024-08-21T05:34:56.677Z",
"dateUpdated": "2024-12-19T09:19:58.235Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2024-45000\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-04T20:15:08.657\",\"lastModified\":\"2024-09-06T16:27:31.003\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfs/netfs/fscache_cookie: add missing \\\"n_accesses\\\" check\\n\\nThis fixes a NULL pointer dereference bug due to a data race which\\nlooks like this:\\n\\n BUG: kernel NULL pointer dereference, address: 0000000000000008\\n #PF: supervisor read access in kernel mode\\n #PF: error_code(0x0000) - not-present page\\n PGD 0 P4D 0\\n Oops: 0000 [#1] SMP PTI\\n CPU: 33 PID: 16573 Comm: kworker/u97:799 Not tainted 6.8.7-cm4all1-hp+ #43\\n Hardware name: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 10/17/2018\\n Workqueue: events_unbound netfs_rreq_write_to_cache_work\\n RIP: 0010:cachefiles_prepare_write+0x30/0xa0\\n Code: 57 41 56 45 89 ce 41 55 49 89 cd 41 54 49 89 d4 55 53 48 89 fb 48 83 ec 08 48 8b 47 08 48 83 7f 10 00 48 89 34 24 48 8b 68 20 \u003c48\u003e 8b 45 08 4c 8b 38 74 45 49 8b 7f 50 e8 4e a9 b0 ff 48 8b 73 10\\n RSP: 0018:ffffb4e78113bde0 EFLAGS: 00010286\\n RAX: ffff976126be6d10 RBX: ffff97615cdb8438 RCX: 0000000000020000\\n RDX: ffff97605e6c4c68 RSI: ffff97605e6c4c60 RDI: ffff97615cdb8438\\n RBP: 0000000000000000 R08: 0000000000278333 R09: 0000000000000001\\n R10: ffff97605e6c4600 R11: 0000000000000001 R12: ffff97605e6c4c68\\n R13: 0000000000020000 R14: 0000000000000001 R15: ffff976064fe2c00\\n FS: 0000000000000000(0000) GS:ffff9776dfd40000(0000) knlGS:0000000000000000\\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 0000000000000008 CR3: 000000005942c002 CR4: 00000000001706f0\\n Call Trace:\\n \u003cTASK\u003e\\n ? __die+0x1f/0x70\\n ? page_fault_oops+0x15d/0x440\\n ? search_module_extables+0xe/0x40\\n ? fixup_exception+0x22/0x2f0\\n ? exc_page_fault+0x5f/0x100\\n ? asm_exc_page_fault+0x22/0x30\\n ? cachefiles_prepare_write+0x30/0xa0\\n netfs_rreq_write_to_cache_work+0x135/0x2e0\\n process_one_work+0x137/0x2c0\\n worker_thread+0x2e9/0x400\\n ? __pfx_worker_thread+0x10/0x10\\n kthread+0xcc/0x100\\n ? __pfx_kthread+0x10/0x10\\n ret_from_fork+0x30/0x50\\n ? __pfx_kthread+0x10/0x10\\n ret_from_fork_asm+0x1b/0x30\\n \u003c/TASK\u003e\\n Modules linked in:\\n CR2: 0000000000000008\\n ---[ end trace 0000000000000000 ]---\\n\\nThis happened because fscache_cookie_state_machine() was slow and was\\nstill running while another process invoked fscache_unuse_cookie();\\nthis led to a fscache_cookie_lru_do_one() call, setting the\\nFSCACHE_COOKIE_DO_LRU_DISCARD flag, which was picked up by\\nfscache_cookie_state_machine(), withdrawing the cookie via\\ncachefiles_withdraw_cookie(), clearing cookie-\u003ecache_priv.\\n\\nAt the same time, yet another process invoked\\ncachefiles_prepare_write(), which found a NULL pointer in this code\\nline:\\n\\n struct cachefiles_object *object = cachefiles_cres_object(cres);\\n\\nThe next line crashes, obviously:\\n\\n struct cachefiles_cache *cache = object-\u003evolume-\u003ecache;\\n\\nDuring cachefiles_prepare_write(), the \\\"n_accesses\\\" counter is\\nnon-zero (via fscache_begin_operation()). The cookie must not be\\nwithdrawn until it drops to zero.\\n\\nThe counter is checked by fscache_cookie_state_machine() before\\nswitching to FSCACHE_COOKIE_STATE_RELINQUISHING and\\nFSCACHE_COOKIE_STATE_WITHDRAWING (in \\\"case\\nFSCACHE_COOKIE_STATE_FAILED\\\"), but not for\\nFSCACHE_COOKIE_STATE_LRU_DISCARDING (\\\"case\\nFSCACHE_COOKIE_STATE_ACTIVE\\\").\\n\\nThis patch adds the missing check. With a non-zero access counter,\\nthe function returns and the next fscache_end_cookie_access() call\\nwill queue another fscache_cookie_state_machine() call to handle the\\nstill-pending FSCACHE_COOKIE_DO_LRU_DISCARD.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fs/netfs/fscache_cookie: agregar comprobaci\u00f3n \\\"n_accesses\\\" faltante Esto corrige un error de desreferencia de puntero NULL debido a una ejecuci\u00f3n de datos que se ve as\u00ed: ERROR: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000008 #PF: acceso de lectura de supervisor en modo kernel #PF: error_code(0x0000) - p\u00e1gina no presente PGD 0 P4D 0 Oops: 0000 [#1] SMP PTI CPU: 33 PID: 16573 Comm: kworker/u97:799 No contaminado 6.8.7-cm4all1-hp+ #43 Nombre del hardware: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 17/10/2018 Cola de trabajo: events_unbound netfs_rreq_write_to_cache_work RIP: 0010:cachefiles_prepare_write+0x30/0xa0 C\u00f3digo: 57 41 56 45 89 ce 41 55 49 89 cd 41 54 49 89 d4 55 53 48 89 fb 48 83 ec 08 48 8b 47 08 48 83 7f 10 00 48 89 34 24 48 8b 68 20 \u0026lt;48\u0026gt; 8b 45 08 4c 8b 38 74 45 49 8b 7f 50 e8 4e a9 b0 ff 48 8b 73 10 RSP: 0018:ffffb4e78113bde0 EFLAGS: 00010286 RAX: ffff976126be6d10 RBX: ffff97615cdb8438 RCX: 0000000000020000 RDX: ffff97605e6c4c68 RSI: ffff97605e6c4c60 RDI: ffff97615cdb8438 RBP: 000000000000000 R08: 0000000000278333 R09: 0000000000000001 R10: ffff97605e6c4600 R11: 0000000000000001 R12: ffff97605e6c4c68 R13: 0000000000020000 R14: 0000000000000001 R15: ffff976064fe2c00 FS: 000000000000000(0000) GS:ffff9776dfd40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000008 CR3: 000000005942c002 CR4: 00000000001706f0 Seguimiento de llamadas: ? __die+0x1f/0x70 ? page_fault_oops+0x15d/0x440 ? search_module_extables+0xe/0x40 ? fixup_exception+0x22/0x2f0 ? exc_page_fault+0x5f/0x100 ? asm_exc_page_fault+0x22/0x30 ? cachefiles_prepare_write+0x30/0xa0 netfs_rreq_write_to_cache_work+0x135/0x2e0 process_one_work+0x137/0x2c0 subproceso_trabajador+0x2e9/0x400 ? __pfx_worker_thread+0x10/0x10 kthread+0xcc/0x100 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x30/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1b/0x30 M\u00f3dulos vinculados en: CR2: 000000000000008 ---[ fin del seguimiento 000000000000000 ]--- Esto sucedi\u00f3 porque fscache_cookie_state_machine() era lento y todav\u00eda se estaba ejecutando mientras otro proceso invocaba fscache_unuse_cookie(); Esto llev\u00f3 a una llamada a fscache_cookie_lru_do_one(), que estableci\u00f3 el indicador FSCACHE_COOKIE_DO_LRU_DISCARD, que fue detectado por fscache_cookie_state_machine(), retirando la cookie a trav\u00e9s de cachefiles_withdraw_cookie(), borrando cookie-\u0026gt;cache_priv. Al mismo tiempo, otro proceso invoc\u00f3 cachefiles_prepare_write(), que encontr\u00f3 un puntero NULL en esta l\u00ednea de c\u00f3digo: struct cachefiles_object *object = cachefiles_cres_object(cres); La siguiente l\u00ednea falla, obviamente: struct cachefiles_cache *cache = object-\u0026gt;volume-\u0026gt;cache; Durante cachefiles_prepare_write(), el contador \\\"n_accesses\\\" no es cero (a trav\u00e9s de fscache_begin_operation()). La cookie no debe retirarse hasta que baje a cero. El contador se comprueba mediante fscache_cookie_state_machine() antes de cambiar a FSCACHE_COOKIE_STATE_RELINQUISHING y FSCACHE_COOKIE_STATE_WITHDRAWING (en el \\\"caso FSCACHE_COOKIE_STATE_FAILED\\\"), pero no para FSCACHE_COOKIE_STATE_LRU_DISCARDING (\\\"caso FSCACHE_COOKIE_STATE_ACTIVE\\\"). Este parche agrega la comprobaci\u00f3n faltante. Con un contador de acceso distinto de cero, la funci\u00f3n retorna y la siguiente llamada fscache_end_cookie_access() pondr\u00e1 en cola otra llamada fscache_cookie_state_machine() para manejar la FSCACHE_COOKIE_DO_LRU_DISCARD a\u00fan pendiente.\"}],\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17\",\"versionEndExcluding\":\"6.1.107\",\"matchCriteriaId\":\"E1FCBB3B-3EA3-4D99-B4C1-E8EA9F3DA097\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.48\",\"matchCriteriaId\":\"9DE9201A-CE6B-4726-BABB-8265EA0F8AE4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.7\",\"matchCriteriaId\":\"D2AFDFD1-D95A-4EB7-843B-5E7659518B67\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8B3CE743-2126-47A3-8B7C-822B502CF119\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DEB27E7-30AA-45CC-8934-B89263EF3551\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0005AEF-856E-47EB-BFE4-90C46899394D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0a4d41fa14b2a0efd40e350cfe8ec6a4c998ac1d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b8a50877f68efdcc0be3fcc5116e00c31b90e45b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/dfaa39b05a6cf34a16c525a2759ee6ab26b5fef6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f71aa06398aabc2e3eaac25acdf3d62e0094ba70\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
}
}
Loading...
Loading...
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.