205 lines
10 KiB
JSON
205 lines
10 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-35929",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-05-17T13:50:33.129Z",
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"datePublished": "2024-05-19T10:10:38.388Z",
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"dateUpdated": "2026-05-11T20:13:55.186Z"
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},
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"containers": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T20:13:55.186Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu/nocb: Fix WARN_ON_ONCE() in the rcu_nocb_bypass_lock()\n\nFor the kernels built with CONFIG_RCU_NOCB_CPU_DEFAULT_ALL=y and\nCONFIG_RCU_LAZY=y, the following scenarios will trigger WARN_ON_ONCE()\nin the rcu_nocb_bypass_lock() and rcu_nocb_wait_contended() functions:\n\n CPU2 CPU11\nkthread\nrcu_nocb_cb_kthread ksys_write\nrcu_do_batch vfs_write\nrcu_torture_timer_cb proc_sys_write\n__kmem_cache_free proc_sys_call_handler\nkmemleak_free drop_caches_sysctl_handler\ndelete_object_full drop_slab\n__delete_object shrink_slab\nput_object lazy_rcu_shrink_scan\ncall_rcu rcu_nocb_flush_bypass\n__call_rcu_commn rcu_nocb_bypass_lock\n raw_spin_trylock(&rdp->nocb_bypass_lock) fail\n atomic_inc(&rdp->nocb_lock_contended);\nrcu_nocb_wait_contended WARN_ON_ONCE(smp_processor_id() != rdp->cpu);\n WARN_ON_ONCE(atomic_read(&rdp->nocb_lock_contended)) |\n |_ _ _ _ _ _ _ _ _ _same rdp and rdp->cpu != 11_ _ _ _ _ _ _ _ _ __|\n\nReproduce this bug with \"echo 3 > /proc/sys/vm/drop_caches\".\n\nThis commit therefore uses rcu_nocb_try_flush_bypass() instead of\nrcu_nocb_flush_bypass() in lazy_rcu_shrink_scan(). If the nocb_bypass\nqueue is being flushed, then rcu_nocb_try_flush_bypass will return\ndirectly."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"kernel/rcu/tree_nocb.h"
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],
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"versions": [
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{
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"version": "7625926086765123251f765d91fc3a70617d334d",
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"lessThan": "927d1f4f77e4784ab3944a9df86ab14d1cd3185a",
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"kernel/rcu/tree_nocb.h"
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],
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"versions": [
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{
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"version": "6.5",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.5",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.27",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.8.6",
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"lessThanOrEqual": "6.8.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.9",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"title": "rcu/nocb: Fix WARN_ON_ONCE() in the rcu_nocb_bypass_lock()",
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