{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-54316", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-30T12:06:44.531Z", "datePublished": "2025-12-30T12:23:46.526Z", "dateUpdated": "2025-12-30T12:23:46.526Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-30T12:23:46.526Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrefscale: Fix uninitalized use of wait_queue_head_t\n\nRunning the refscale test occasionally crashes the kernel with the\nfollowing error:\n\n[ 8569.952896] BUG: unable to handle page fault for address: ffffffffffffffe8\n[ 8569.952900] #PF: supervisor read access in kernel mode\n[ 8569.952902] #PF: error_code(0x0000) - not-present page\n[ 8569.952904] PGD c4b048067 P4D c4b049067 PUD c4b04b067 PMD 0\n[ 8569.952910] Oops: 0000 [#1] PREEMPT_RT SMP NOPTI\n[ 8569.952916] Hardware name: Dell Inc. PowerEdge R750/0WMWCR, BIOS 1.2.4 05/28/2021\n[ 8569.952917] RIP: 0010:prepare_to_wait_event+0x101/0x190\n :\n[ 8569.952940] Call Trace:\n[ 8569.952941] <TASK>\n[ 8569.952944] ref_scale_reader+0x380/0x4a0 [refscale]\n[ 8569.952959] kthread+0x10e/0x130\n[ 8569.952966] ret_from_fork+0x1f/0x30\n[ 8569.952973] </TASK>\n\nThe likely cause is that init_waitqueue_head() is called after the call to\nthe torture_create_kthread() function that creates the ref_scale_reader\nkthread. Although this init_waitqueue_head() call will very likely\ncomplete before this kthread is created and starts running, it is\npossible that the calling kthread will be delayed between the calls to\ntorture_create_kthread() and init_waitqueue_head(). In this case, the\nnew kthread will use the waitqueue head before it is properly initialized,\nwhich is not good for the kernel's health and well-being.\n\nThe above crash happened here:\n\n\tstatic inline void __add_wait_queue(...)\n\t{\n\t\t:\n\t\tif (!(wq->flags & WQ_FLAG_PRIORITY)) <=== Crash here\n\nThe offset of flags from list_head entry in wait_queue_entry is\n-0x18. If reader_tasks[i].wq.head.next is NULL as allocated reader_task\nstructure is zero initialized, the instruction will try to access address\n0xffffffffffffffe8, which is exactly the fault address listed above.\n\nThis commit therefore invokes init_waitqueue_head() before creating\nthe kthread."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/rcu/refscale.c"], "versions": [{"version": "653ed64b01dc5989f8f579d0038e987476c2c023", "lessThan": "066fbd8bc981cf49923bf828b7b4092894df577f", "status": "affected", "versionType": "git"}, {"version": "653ed64b01dc5989f8f579d0038e987476c2c023", "lessThan": "ec9d118ad99dc6f1bc674c1e649c25533d89b9ba", "status": "affected", "versionType": "git"}, {"version": "653ed64b01dc5989f8f579d0038e987476c2c023", "lessThan": "e0322a255a2242dbe4686b6176b3c83dea490529", "status": "affected", "versionType": "git"}, {"version": "653ed64b01dc5989f8f579d0038e987476c2c023", "lessThan": "e5de968a9032366198720eac4f368ed7e690b3ef", "status": "affected", "versionType": "git"}, {"version": "653ed64b01dc5989f8f579d0038e987476c2c023", "lessThan": "70a2856fd1d0a040c876ba9e3f89b949ae92e4dd", "status": "affected", "versionType": "git"}, {"version": "653ed64b01dc5989f8f579d0038e987476c2c023", "lessThan": "f5063e8948dad7f31adb007284a5d5038ae31bb8", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/rcu/refscale.c"], "versions": [{"version": "5.9", "status": "affected"}, {"version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.195", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.132", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.53", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.4.16", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.5.3", "lessThanOrEqual": "6.5.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.10.195"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.132"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.1.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.4.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.5.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/066fbd8bc981cf49923bf828b7b4092894df577f"}, {"url": "https://git.kernel.org/stable/c/ec9d118ad99dc6f1bc674c1e649c25533d89b9ba"}, {"url": "https://git.kernel.org/stable/c/e0322a255a2242dbe4686b6176b3c83dea490529"}, {"url": "https://git.kernel.org/stable/c/e5de968a9032366198720eac4f368ed7e690b3ef"}, {"url": "https://git.kernel.org/stable/c/70a2856fd1d0a040c876ba9e3f89b949ae92e4dd"}, {"url": "https://git.kernel.org/stable/c/f5063e8948dad7f31adb007284a5d5038ae31bb8"}], "title": "refscale: Fix uninitalized use of wait_queue_head_t", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrefscale: Fix uninitalized use of wait_queue_head_t\n\nRunning the refscale test occasionally crashes the kernel with the\nfollowing error:\n\n[ 8569.952896] BUG: unable to handle page fault for address: ffffffffffffffe8\n[ 8569.952900] #PF: supervisor read access in kernel mode\n[ 8569.952902] #PF: error_code(0x0000) - not-present page\n[ 8569.952904] PGD c4b048067 P4D c4b049067 PUD c4b04b067 PMD 0\n[ 8569.952910] Oops: 0000 [#1] PREEMPT_RT SMP NOPTI\n[ 8569.952916] Hardware name: Dell Inc. PowerEdge R750/0WMWCR, BIOS 1.2.4 05/28/2021\n[ 8569.952917] RIP: 0010:prepare_to_wait_event+0x101/0x190\n :\n[ 8569.952940] Call Trace:\n[ 8569.952941] <TASK>\n[ 8569.952944] ref_scale_reader+0x380/0x4a0 [refscale]\n[ 8569.952959] kthread+0x10e/0x130\n[ 8569.952966] ret_from_fork+0x1f/0x30\n[ 8569.952973] </TASK>\n\nThe likely cause is that init_waitqueue_head() is called after the call to\nthe torture_create_kthread() function that creates the ref_scale_reader\nkthread. Although this init_waitqueue_head() call will very likely\ncomplete before this kthread is created and starts running, it is\npossible that the calling kthread will be delayed between the calls to\ntorture_create_kthread() and init_waitqueue_head(). In this case, the\nnew kthread will use the waitqueue head before it is properly initialized,\nwhich is not good for the kernel's health and well-being.\n\nThe above crash happened here:\n\n\tstatic inline void __add_wait_queue(...)\n\t{\n\t\t:\n\t\tif (!(wq->flags & WQ_FLAG_PRIORITY)) <=== Crash here\n\nThe offset of flags from list_head entry in wait_queue_entry is\n-0x18. If reader_tasks[i].wq.head.next is NULL as allocated reader_task\nstructure is zero initialized, the instruction will try to access address\n0xffffffffffffffe8, which is exactly the fault address listed above.\n\nThis commit therefore invokes init_waitqueue_head() before creating\nthe kthread."}], "id": "CVE-2023-54316", "lastModified": "2025-12-30T13:16:20.867", "metrics": {}, "published": "2025-12-30T13:16:20.867", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/066fbd8bc981cf49923bf828b7b4092894df577f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/70a2856fd1d0a040c876ba9e3f89b949ae92e4dd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e0322a255a2242dbe4686b6176b3c83dea490529"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5de968a9032366198720eac4f368ed7e690b3ef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ec9d118ad99dc6f1bc674c1e649c25533d89b9ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f5063e8948dad7f31adb007284a5d5038ae31bb8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}