CVE-2022-50423 (GCVE-0-2022-50423)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:41 – Updated: 2026-08-05 08:58
VLAI
Title
ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage()
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage() There is an use-after-free reported by KASAN: BUG: KASAN: use-after-free in acpi_ut_remove_reference+0x3b/0x82 Read of size 1 at addr ffff888112afc460 by task modprobe/2111 CPU: 0 PID: 2111 Comm: modprobe Not tainted 6.1.0-rc7-dirty Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), Call Trace: <TASK> kasan_report+0xae/0xe0 acpi_ut_remove_reference+0x3b/0x82 acpi_ut_copy_iobject_to_iobject+0x3be/0x3d5 acpi_ds_store_object_to_local+0x15d/0x3a0 acpi_ex_store+0x78d/0x7fd acpi_ex_opcode_1A_1T_1R+0xbe4/0xf9b acpi_ps_parse_aml+0x217/0x8d5 ... </TASK> The root cause of the problem is that the acpi_operand_object is freed when acpi_ut_walk_package_tree() fails in acpi_ut_copy_ipackage_to_ipackage(), lead to repeated release in acpi_ut_copy_iobject_to_iobject(). The problem was introduced by "8aa5e56eeb61" commit, this commit is to fix memory leak in acpi_ut_copy_iobject_to_iobject(), repeatedly adding remove operation, lead to "acpi_operand_object" used after free. Fix it by removing acpi_ut_remove_reference() in acpi_ut_copy_ipackage_to_ipackage(). acpi_ut_copy_ipackage_to_ipackage() is called to copy an internal package object into another internal package object, when it fails, the memory of acpi_operand_object should be freed by the caller.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 17:39 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce , < 133462d35dae95edb944af86b986d4c9dec59bd1 (git)
Affected: 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce , < 02f237423c9c6a18e062de2d474f85d5659e4eb9 (git)
Affected: 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce , < c9125b643fc51b8e662f2f614096ceb45a0adbc3 (git)
Affected: 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce , < dfdde4d5138bc023897033a5ac653a84e94805be (git)
Affected: 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce , < 02617006b5a46f2ea55ac61f5693c7afd7bf9276 (git)
Affected: 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce , < 6fde666278f91b85d71545a0ebbf41d8d7af8074 (git)
Affected: 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce , < f51b2235e4f320edc839c3e5cb0d1f8a6e8657c6 (git)
Affected: 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce , < 01f2c2052ea50fb9a8ce12e4e83aed0267934ef0 (git)
Affected: 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce , < 470188b09e92d83c5a997f25f0e8fb8cd2bc3469 (git)
Affected: b3e98f0c4f996cd53b80bad71f0d7e4a2cf3a4e8 (git)
Affected: 7af5504c102a378376101dbd160246b10a814dd0 (git)
Affected: e29a15484d7ea949e49ae7fb7e576a575da824a6 (git)
Affected: e2ab6731a36966d042a2d4dabd980496cd680f75 (git)
Affected: 3.10.55 , < 3.11 (semver)
Affected: 3.12.29 , < 3.13 (semver)
Affected: 3.14.19 , < 3.15 (semver)
Affected: 3.16.3 , < 3.17 (semver)
Create a notification for this product.
Linux Linux Affected: 3.17
Unaffected: 0 , < 3.17 (semver)
Unaffected: 4.9.337 , ≤ 4.9.* (semver)
Unaffected: 4.14.303 , ≤ 4.14.* (semver)
Unaffected: 4.19.270 , ≤ 4.19.* (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.163 , ≤ 5.10.* (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage()\n\nThere is an use-after-free reported by KASAN:\n\n  BUG: KASAN: use-after-free in acpi_ut_remove_reference+0x3b/0x82\n  Read of size 1 at addr ffff888112afc460 by task modprobe/2111\n  CPU: 0 PID: 2111 Comm: modprobe Not tainted 6.1.0-rc7-dirty\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),\n  Call Trace:\n   \u003cTASK\u003e\n   kasan_report+0xae/0xe0\n   acpi_ut_remove_reference+0x3b/0x82\n   acpi_ut_copy_iobject_to_iobject+0x3be/0x3d5\n   acpi_ds_store_object_to_local+0x15d/0x3a0\n   acpi_ex_store+0x78d/0x7fd\n   acpi_ex_opcode_1A_1T_1R+0xbe4/0xf9b\n   acpi_ps_parse_aml+0x217/0x8d5\n   ...\n   \u003c/TASK\u003e\n\nThe root cause of the problem is that the acpi_operand_object\nis freed when acpi_ut_walk_package_tree() fails in\nacpi_ut_copy_ipackage_to_ipackage(), lead to repeated release in\nacpi_ut_copy_iobject_to_iobject(). The problem was introduced\nby \"8aa5e56eeb61\" commit, this commit is to fix memory leak in\nacpi_ut_copy_iobject_to_iobject(), repeatedly adding remove\noperation, lead to \"acpi_operand_object\" used after free.\n\nFix it by removing acpi_ut_remove_reference() in\nacpi_ut_copy_ipackage_to_ipackage(). acpi_ut_copy_ipackage_to_ipackage()\nis called to copy an internal package object into another internal\npackage object, when it fails, the memory of acpi_operand_object\nshould be freed by the caller."
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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              "lang": "en",
              "value": "AV:L - The UAF is in the ACPICA AML interpreter (`acpi_ut_copy_ipackage_to_ipackage` during Store-to-Local), reached only via local ACPI table load or control-method evaluation; there is no network or adjacent-packet path into this code.\nAC:L - Once a firmware method Stores a shared package to a Local/Arg, the attacker can deterministically force the mid-walk AE_NO_MEMORY failure that triggers the double-free by exhausting memcg-accounted GFP_KERNEL allocations in the same process context that evaluates the method (e.g. container memory.max); no race or attacker-uncontrollable layout is required.\nPR:L - Unprivileged local users can drive ACPI method evaluation through world-readable ACPI/thermal/power sysfs attributes (0444) with no capability check; root-only interfaces such as configfs SSDT load or custom_method are not required on firmware that already Stores packages during those methods.\nUI:N - The attacker triggers evaluation directly via their own sysfs reads under memory pressure; no separate victim action such as mounting a filesystem is required.\nS:U - Impact is a host-kernel slab use-after-free within the same OS security authority; there is no VM escape, IOMMU bypass, or other cross-boundary compromise.\nC:H - The second `acpi_ut_remove_reference()` reads the already-freed Acpi-Operand object (as KASAN reported); reclaim/spray of that slab object yields an attacker-controlled read primitive, so confidentiality is High per UAF guidance.\nI:H - The same double-free of the package operand object is a classic heap UAF/double-free that enables spray-based arbitrary write and control-flow hijack primitives, so integrity is High.\nA:H - The bug was reported as a KASAN use-after-free and any second free or reuse of the dangling operand readily oopses/panics the kernel; per guidance any UAF is Availability High."
            }
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        "dateUpdated": "2026-08-05T08:58:45.759Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/133462d35dae95edb944af86b986d4c9dec59bd1"
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          "url": "https://git.kernel.org/stable/c/02f237423c9c6a18e062de2d474f85d5659e4eb9"
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        },
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          "url": "https://git.kernel.org/stable/c/dfdde4d5138bc023897033a5ac653a84e94805be"
        },
        {
          "url": "https://git.kernel.org/stable/c/02617006b5a46f2ea55ac61f5693c7afd7bf9276"
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        {
          "url": "https://git.kernel.org/stable/c/6fde666278f91b85d71545a0ebbf41d8d7af8074"
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        {
          "url": "https://git.kernel.org/stable/c/470188b09e92d83c5a997f25f0e8fb8cd2bc3469"
        }
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      "title": "ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage()",
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    "cveId": "CVE-2022-50423",
    "datePublished": "2025-10-01T11:41:56.083Z",
    "dateReserved": "2025-09-17T14:53:07.004Z",
    "dateUpdated": "2026-08-05T08:58:45.759Z",
    "state": "PUBLISHED"
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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50423\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-01T12:15:33.683\",\"lastModified\":\"2026-06-17T05:23:31.393\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage()\\n\\nThere is an use-after-free reported by KASAN:\\n\\n  BUG: KASAN: use-after-free in acpi_ut_remove_reference+0x3b/0x82\\n  Read of size 1 at addr ffff888112afc460 by task modprobe/2111\\n  CPU: 0 PID: 2111 Comm: modprobe Not tainted 6.1.0-rc7-dirty\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),\\n  Call Trace:\\n   \u003cTASK\u003e\\n   kasan_report+0xae/0xe0\\n   acpi_ut_remove_reference+0x3b/0x82\\n   acpi_ut_copy_iobject_to_iobject+0x3be/0x3d5\\n   acpi_ds_store_object_to_local+0x15d/0x3a0\\n   acpi_ex_store+0x78d/0x7fd\\n   acpi_ex_opcode_1A_1T_1R+0xbe4/0xf9b\\n   acpi_ps_parse_aml+0x217/0x8d5\\n   ...\\n   \u003c/TASK\u003e\\n\\nThe root cause of the problem is that the acpi_operand_object\\nis freed when acpi_ut_walk_package_tree() fails in\\nacpi_ut_copy_ipackage_to_ipackage(), lead to repeated release in\\nacpi_ut_copy_iobject_to_iobject(). The problem was introduced\\nby \\\"8aa5e56eeb61\\\" commit, this commit is to fix memory leak in\\nacpi_ut_copy_iobject_to_iobject(), repeatedly adding remove\\noperation, lead to \\\"acpi_operand_object\\\" used after free.\\n\\nFix it by removing acpi_ut_remove_reference() in\\nacpi_ut_copy_ipackage_to_ipackage(). acpi_ut_copy_ipackage_to_ipackage()\\nis called to copy an internal package object into another internal\\npackage object, when it fails, the memory of acpi_operand_object\\nshould be freed by the caller.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/acpi/acpica/utcopy.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\",\"lessThan\":\"133462d35dae95edb944af86b986d4c9dec59bd1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\",\"lessThan\":\"02f237423c9c6a18e062de2d474f85d5659e4eb9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\",\"lessThan\":\"c9125b643fc51b8e662f2f614096ceb45a0adbc3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\",\"lessThan\":\"dfdde4d5138bc023897033a5ac653a84e94805be\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\",\"lessThan\":\"02617006b5a46f2ea55ac61f5693c7afd7bf9276\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\",\"lessThan\":\"6fde666278f91b85d71545a0ebbf41d8d7af8074\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\",\"lessThan\":\"f51b2235e4f320edc839c3e5cb0d1f8a6e8657c6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\",\"lessThan\":\"01f2c2052ea50fb9a8ce12e4e83aed0267934ef0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\",\"lessThan\":\"470188b09e92d83c5a997f25f0e8fb8cd2bc3469\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b3e98f0c4f996cd53b80bad71f0d7e4a2cf3a4e8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7af5504c102a378376101dbd160246b10a814dd0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e29a15484d7ea949e49ae7fb7e576a575da824a6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e2ab6731a36966d042a2d4dabd980496cd680f75\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3.10.55\",\"lessThan\":\"3.11\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"3.12.29\",\"lessThan\":\"3.13\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"3.14.19\",\"lessThan\":\"3.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"3.16.3\",\"lessThan\":\"3.17\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/acpi/acpica/utcopy.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.9.337\",\"lessThanOrEqual\":\"4.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.14.303\",\"lessThanOrEqual\":\"4.14.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.270\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.229\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.163\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.86\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.16\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.2\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"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:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-01-14T17:39:57.539191Z\",\"id\":\"CVE-2022-50423\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.10.55\",\"versionEndExcluding\":\"3.11\",\"matchCriteriaId\":\"5A516330-2A83-4603-8C0E-BBDFEECC27E9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.12.29\",\"versionEndExcluding\":\"3.13\",\"matchCriteriaId\":\"25875AFE-CAEF-4D99-9B64-23F2B24C08D0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.14.19\",\"versionEndExcluding\":\"3.15\",\"matchCriteriaId\":\"5D53296D-7B6A-4B74-A72C-45082E6C8531\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.16.3\",\"versionEndExcluding\":\"4.9.337\",\"matchCriteriaId\":\"D40F5AA2-90E2-40CE-A033-F1CB0E73BF7C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.10\",\"versionEndExcluding\":\"4.14.303\",\"matchCriteriaId\":\"1E7450AD-4739-46F0-B81B-C02E7B35A97B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.15\",\"versionEndExcluding\":\"4.19.270\",\"matchCriteriaId\":\"AE8904A3-99BE-4E49-9682-1F90A6373F4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.229\",\"matchCriteriaId\":\"A0C0D95E-414A-445E-941B-3EF6A4D3A093\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.163\",\"matchCriteriaId\":\"D05D31FC-BD74-4F9E-B1D8-9CED62BE6F65\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.86\",\"matchCriteriaId\":\"47237296-55D1-4ED4-8075-D00FC85A61EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.0.16\",\"matchCriteriaId\":\"C720A569-3D93-4D77-95F6-E2B3A3267D9F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.1\",\"versionEndExcluding\":\"6.1.2\",\"matchCriteriaId\":\"77239F4B-6BB2-4B9E-A654-36A52396116C\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/01f2c2052ea50fb9a8ce12e4e83aed0267934ef0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/02617006b5a46f2ea55ac61f5693c7afd7bf9276\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/02f237423c9c6a18e062de2d474f85d5659e4eb9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/133462d35dae95edb944af86b986d4c9dec59bd1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/470188b09e92d83c5a997f25f0e8fb8cd2bc3469\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6fde666278f91b85d71545a0ebbf41d8d7af8074\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c9125b643fc51b8e662f2f614096ceb45a0adbc3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/dfdde4d5138bc023897033a5ac653a84e94805be\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f51b2235e4f320edc839c3e5cb0d1f8a6e8657c6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T18:46:16+00:00",
      "cve": "CVE-2022-50423",
      "id": "CVE-2022-50423",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "120",
      "product_status:known_affected": "138",
      "product_status:known_not_affected": "104",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel: Information disclosure and denial of service via use-after-free in ACPI subsystem",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-50423.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-05T01:09:55Z",
      "cve": "CVE-2022-50423",
      "id": "CVE-2022-50423",
      "initial_release_date": "2025-10-01T23:33:03Z",
      "product_status:known_affected": "420",
      "product_status:known_not_affected": "187",
      "product_status:recommended": "356",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-50423",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-50423.json",
      "version": "56"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-50423\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T17:39:57.539191Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T17:39:53.133Z\"}}], \"cna\": {\"title\": \"ACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\", \"lessThan\": \"133462d35dae95edb944af86b986d4c9dec59bd1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\", \"lessThan\": \"02f237423c9c6a18e062de2d474f85d5659e4eb9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\", \"lessThan\": \"c9125b643fc51b8e662f2f614096ceb45a0adbc3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\", \"lessThan\": \"dfdde4d5138bc023897033a5ac653a84e94805be\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\", \"lessThan\": \"02617006b5a46f2ea55ac61f5693c7afd7bf9276\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\", \"lessThan\": \"6fde666278f91b85d71545a0ebbf41d8d7af8074\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\", \"lessThan\": \"f51b2235e4f320edc839c3e5cb0d1f8a6e8657c6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\", \"lessThan\": \"01f2c2052ea50fb9a8ce12e4e83aed0267934ef0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"8aa5e56eeb61a099ea6519eb30ee399e1bc043ce\", \"lessThan\": \"470188b09e92d83c5a997f25f0e8fb8cd2bc3469\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b3e98f0c4f996cd53b80bad71f0d7e4a2cf3a4e8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7af5504c102a378376101dbd160246b10a814dd0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e29a15484d7ea949e49ae7fb7e576a575da824a6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e2ab6731a36966d042a2d4dabd980496cd680f75\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/acpi/acpica/utcopy.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.17\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.9.337\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.303\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.270\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.229\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.163\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.86\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.16\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/acpi/acpica/utcopy.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/133462d35dae95edb944af86b986d4c9dec59bd1\"}, {\"url\": \"https://git.kernel.org/stable/c/02f237423c9c6a18e062de2d474f85d5659e4eb9\"}, {\"url\": \"https://git.kernel.org/stable/c/c9125b643fc51b8e662f2f614096ceb45a0adbc3\"}, {\"url\": \"https://git.kernel.org/stable/c/dfdde4d5138bc023897033a5ac653a84e94805be\"}, {\"url\": \"https://git.kernel.org/stable/c/02617006b5a46f2ea55ac61f5693c7afd7bf9276\"}, {\"url\": \"https://git.kernel.org/stable/c/6fde666278f91b85d71545a0ebbf41d8d7af8074\"}, {\"url\": \"https://git.kernel.org/stable/c/f51b2235e4f320edc839c3e5cb0d1f8a6e8657c6\"}, {\"url\": \"https://git.kernel.org/stable/c/01f2c2052ea50fb9a8ce12e4e83aed0267934ef0\"}, {\"url\": \"https://git.kernel.org/stable/c/470188b09e92d83c5a997f25f0e8fb8cd2bc3469\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nACPICA: Fix use-after-free in acpi_ut_copy_ipackage_to_ipackage()\\n\\nThere is an use-after-free reported by KASAN:\\n\\n  BUG: KASAN: use-after-free in acpi_ut_remove_reference+0x3b/0x82\\n  Read of size 1 at addr ffff888112afc460 by task modprobe/2111\\n  CPU: 0 PID: 2111 Comm: modprobe Not tainted 6.1.0-rc7-dirty\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),\\n  Call Trace:\\n   \u003cTASK\u003e\\n   kasan_report+0xae/0xe0\\n   acpi_ut_remove_reference+0x3b/0x82\\n   acpi_ut_copy_iobject_to_iobject+0x3be/0x3d5\\n   acpi_ds_store_object_to_local+0x15d/0x3a0\\n   acpi_ex_store+0x78d/0x7fd\\n   acpi_ex_opcode_1A_1T_1R+0xbe4/0xf9b\\n   acpi_ps_parse_aml+0x217/0x8d5\\n   ...\\n   \u003c/TASK\u003e\\n\\nThe root cause of the problem is that the acpi_operand_object\\nis freed when acpi_ut_walk_package_tree() fails in\\nacpi_ut_copy_ipackage_to_ipackage(), lead to repeated release in\\nacpi_ut_copy_iobject_to_iobject(). The problem was introduced\\nby \\\"8aa5e56eeb61\\\" commit, this commit is to fix memory leak in\\nacpi_ut_copy_iobject_to_iobject(), repeatedly adding remove\\noperation, lead to \\\"acpi_operand_object\\\" used after free.\\n\\nFix it by removing acpi_ut_remove_reference() in\\nacpi_ut_copy_ipackage_to_ipackage(). acpi_ut_copy_ipackage_to_ipackage()\\nis called to copy an internal package object into another internal\\npackage object, when it fails, the memory of acpi_operand_object\\nshould be freed by the caller.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.337\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.303\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.270\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.229\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.163\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.86\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.16\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.2\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2\", \"versionStartIncluding\": \"3.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.10.55\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.12.29\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.14.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"3.16.3\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:19:12.324Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-50423\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:19:12.324Z\", \"dateReserved\": \"2025-09-17T14:53:07.004Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-10-01T11:41:56.083Z\", \"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.