cve-2022-48751
Vulnerability from cvelistv5
Published
2024-06-20 11:13
Modified
2024-12-19 08:07
Severity ?
Summary
net/smc: Transitional solution for clcsock race issue
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/38f0bdd548fd2ef5d481b88d8a2bfef968452e34Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4284225cd8001e134f5cf533a7cd244bbb654d0fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c0bf3d8a943b6f2e912b7c1de03e2ef28e76f760Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/38f0bdd548fd2ef5d481b88d8a2bfef968452e34Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4284225cd8001e134f5cf533a7cd244bbb654d0fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c0bf3d8a943b6f2e912b7c1de03e2ef28e76f760Patch
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-48751\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-20T12:15:13.310\",\"lastModified\":\"2025-01-06T21:47:12.903\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/smc: Transitional solution for clcsock race issue\\n\\nWe encountered a crash in smc_setsockopt() and it is caused by\\naccessing smc-\u003eclcsock after clcsock was released.\\n\\n BUG: kernel NULL pointer dereference, address: 0000000000000020\\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] PREEMPT SMP PTI\\n CPU: 1 PID: 50309 Comm: nginx Kdump: loaded Tainted: G E     5.16.0-rc4+ #53\\n RIP: 0010:smc_setsockopt+0x59/0x280 [smc]\\n Call Trace:\\n  \u003cTASK\u003e\\n  __sys_setsockopt+0xfc/0x190\\n  __x64_sys_setsockopt+0x20/0x30\\n  do_syscall_64+0x34/0x90\\n  entry_SYSCALL_64_after_hwframe+0x44/0xae\\n RIP: 0033:0x7f16ba83918e\\n  \u003c/TASK\u003e\\n\\nThis patch tries to fix it by holding clcsock_release_lock and\\nchecking whether clcsock has already been released before access.\\n\\nIn case that a crash of the same reason happens in smc_getsockopt()\\nor smc_switch_to_fallback(), this patch also checkes smc-\u003eclcsock\\nin them too. And the caller of smc_switch_to_fallback() will identify\\nwhether fallback succeeds according to the return value.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/smc: soluci\u00f3n transitoria para el problema de ejecuci\u00f3n de clcsock Encontramos un bloqueo en smc_setsockopt() y se debe al acceso a smc-\u0026gt;clcsock despu\u00e9s de que se lanz\u00f3 clcsock. ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000020 #PF: acceso de lectura del supervisor en modo kernel #PF: c\u00f3digo_error(0x0000) - p\u00e1gina no presente PGD 0 P4D 0 Ups: 0000 [#1] PREEMPT SMP PTI CPU: 1 PID: 50309 Comm: nginx Kdump: cargado Contaminado: GE 5.16.0-rc4+ #53 RIP: 0010:smc_setsockopt+0x59/0x280 [smc] Seguimiento de llamadas:  __sys_setsockopt+0xfc/0x190 __x64_sys_setsockopt+0x20/0x30 do_syscall_64+0x34/0x90 Entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f16ba83918e  Este parche intenta solucionarlo manteniendo presionado clcsock_release_lock y verificando si clcsock ya se ha liberado antes del acceso. En caso de que ocurra una falla por el mismo motivo en smc_getsockopt() o smc_switch_to_fallback(), este parche tambi\u00e9n verifica smc-\u0026gt;clcsock en ellos. 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