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CVE-2022-49666 (GCVE-0-2022-49666)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:24 – Updated: 2026-05-23 15:22
VLAI
Title
powerpc/memhotplug: Add add_pages override for PPC
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/memhotplug: Add add_pages override for PPC With commit ffa0b64e3be5 ("powerpc: Fix virt_addr_valid() for 64-bit Book3E & 32-bit") the kernel now validate the addr against high_memory value. This results in the below BUG_ON with dax pfns. [ 635.798741][T26531] kernel BUG at mm/page_alloc.c:5521! 1:mon> e cpu 0x1: Vector: 700 (Program Check) at [c000000007287630] pc: c00000000055ed48: free_pages.part.0+0x48/0x110 lr: c00000000053ca70: tlb_finish_mmu+0x80/0xd0 sp: c0000000072878d0 msr: 800000000282b033 current = 0xc00000000afabe00 paca = 0xc00000037ffff300 irqmask: 0x03 irq_happened: 0x05 pid = 26531, comm = 50-landscape-sy kernel BUG at :5521! Linux version 5.19.0-rc3-14659-g4ec05be7c2e1 (kvaneesh@ltc-boston8) (gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #625 SMP Thu Jun 23 00:35:43 CDT 2022 1:mon> t [link register ] c00000000053ca70 tlb_finish_mmu+0x80/0xd0 [c0000000072878d0] c00000000053ca54 tlb_finish_mmu+0x64/0xd0 (unreliable) [c000000007287900] c000000000539424 exit_mmap+0xe4/0x2a0 [c0000000072879e0] c00000000019fc1c mmput+0xcc/0x210 [c000000007287a20] c000000000629230 begin_new_exec+0x5e0/0xf40 [c000000007287ae0] c00000000070b3cc load_elf_binary+0x3ac/0x1e00 [c000000007287c10] c000000000627af0 bprm_execve+0x3b0/0xaf0 [c000000007287cd0] c000000000628414 do_execveat_common.isra.0+0x1e4/0x310 [c000000007287d80] c00000000062858c sys_execve+0x4c/0x60 [c000000007287db0] c00000000002c1b0 system_call_exception+0x160/0x2c0 [c000000007287e10] c00000000000c53c system_call_common+0xec/0x250 The fix is to make sure we update high_memory on memory hotplug. This is similar to what x86 does in commit 3072e413e305 ("mm/memory_hotplug: introduce add_pages")
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: fddb88bd266f4513abab7c36bca98935c9148a98 , < 89296ac435e2cf8a5101f7fab8f0c7b754b92052 (git)
Affected: ffa0b64e3be58519ae472ea29a1a1ad681e32f48 , < 84d146fd35a01b08e9515041de60f0f915a417d5 (git)
Affected: ffa0b64e3be58519ae472ea29a1a1ad681e32f48 , < ac790d09885d36143076e7e02825c541e8eee899 (git)
Affected: deab81144d5a043f42804207fb76cfbd8a806978 (git)
Affected: d36febbcd537fcc50284e8b89609632d0146529f (git)
Affected: a3727c25eacd7e437c4f560957fa3a376fe93e6b (git)
Affected: cbc065efcba000ad8f615f506ebe61b6d3c5145b (git)
Affected: 5.15.34 , < 5.15.53 (semver)
Affected: 5.4.190 , < 5.5 (semver)
Affected: 5.10.111 , < 5.11 (semver)
Affected: 5.16.20 , < 5.17 (semver)
Affected: 5.17.3 , < 5.18 (semver)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 5.15.53 , ≤ 5.15.* (semver)
Unaffected: 5.18.10 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/memhotplug: Add add_pages override for PPC\n\nWith commit ffa0b64e3be5 (\"powerpc: Fix virt_addr_valid() for 64-bit Book3E \u0026 32-bit\")\nthe kernel now validate the addr against high_memory value. This results\nin the below BUG_ON with dax pfns.\n\n[  635.798741][T26531] kernel BUG at mm/page_alloc.c:5521!\n1:mon\u003e e\ncpu 0x1: Vector: 700 (Program Check) at [c000000007287630]\n    pc: c00000000055ed48: free_pages.part.0+0x48/0x110\n    lr: c00000000053ca70: tlb_finish_mmu+0x80/0xd0\n    sp: c0000000072878d0\n   msr: 800000000282b033\n  current = 0xc00000000afabe00\n  paca    = 0xc00000037ffff300   irqmask: 0x03   irq_happened: 0x05\n    pid   = 26531, comm = 50-landscape-sy\nkernel BUG at :5521!\nLinux version 5.19.0-rc3-14659-g4ec05be7c2e1 (kvaneesh@ltc-boston8) (gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #625 SMP Thu Jun 23 00:35:43 CDT 2022\n1:mon\u003e t\n[link register   ] c00000000053ca70 tlb_finish_mmu+0x80/0xd0\n[c0000000072878d0] c00000000053ca54 tlb_finish_mmu+0x64/0xd0 (unreliable)\n[c000000007287900] c000000000539424 exit_mmap+0xe4/0x2a0\n[c0000000072879e0] c00000000019fc1c mmput+0xcc/0x210\n[c000000007287a20] c000000000629230 begin_new_exec+0x5e0/0xf40\n[c000000007287ae0] c00000000070b3cc load_elf_binary+0x3ac/0x1e00\n[c000000007287c10] c000000000627af0 bprm_execve+0x3b0/0xaf0\n[c000000007287cd0] c000000000628414 do_execveat_common.isra.0+0x1e4/0x310\n[c000000007287d80] c00000000062858c sys_execve+0x4c/0x60\n[c000000007287db0] c00000000002c1b0 system_call_exception+0x160/0x2c0\n[c000000007287e10] c00000000000c53c system_call_common+0xec/0x250\n\nThe fix is to make sure we update high_memory on memory hotplug.\nThis is similar to what x86 does in commit 3072e413e305 (\"mm/memory_hotplug: introduce add_pages\")"
        }
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      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:22:42.733Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/ac790d09885d36143076e7e02825c541e8eee899"
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      "title": "powerpc/memhotplug: Add add_pages override for PPC",
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    "cveId": "CVE-2022-49666",
    "datePublished": "2025-02-26T02:24:01.148Z",
    "dateReserved": "2025-02-26T02:21:30.436Z",
    "dateUpdated": "2026-05-23T15:22:42.733Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49666",
      "date": "2026-09-16",
      "epss": "0.00253",
      "percentile": "0.16969"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49666\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:41.600\",\"lastModified\":\"2026-06-17T05:18:47.597\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/memhotplug: Add add_pages override for PPC\\n\\nWith commit ffa0b64e3be5 (\\\"powerpc: Fix virt_addr_valid() for 64-bit Book3E \u0026 32-bit\\\")\\nthe kernel now validate the addr against high_memory value. This results\\nin the below BUG_ON with dax pfns.\\n\\n[  635.798741][T26531] kernel BUG at mm/page_alloc.c:5521!\\n1:mon\u003e e\\ncpu 0x1: Vector: 700 (Program Check) at [c000000007287630]\\n    pc: c00000000055ed48: free_pages.part.0+0x48/0x110\\n    lr: c00000000053ca70: tlb_finish_mmu+0x80/0xd0\\n    sp: c0000000072878d0\\n   msr: 800000000282b033\\n  current = 0xc00000000afabe00\\n  paca    = 0xc00000037ffff300   irqmask: 0x03   irq_happened: 0x05\\n    pid   = 26531, comm = 50-landscape-sy\\nkernel BUG at :5521!\\nLinux version 5.19.0-rc3-14659-g4ec05be7c2e1 (kvaneesh@ltc-boston8) (gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #625 SMP Thu Jun 23 00:35:43 CDT 2022\\n1:mon\u003e t\\n[link register   ] c00000000053ca70 tlb_finish_mmu+0x80/0xd0\\n[c0000000072878d0] c00000000053ca54 tlb_finish_mmu+0x64/0xd0 (unreliable)\\n[c000000007287900] c000000000539424 exit_mmap+0xe4/0x2a0\\n[c0000000072879e0] c00000000019fc1c mmput+0xcc/0x210\\n[c000000007287a20] c000000000629230 begin_new_exec+0x5e0/0xf40\\n[c000000007287ae0] c00000000070b3cc load_elf_binary+0x3ac/0x1e00\\n[c000000007287c10] c000000000627af0 bprm_execve+0x3b0/0xaf0\\n[c000000007287cd0] c000000000628414 do_execveat_common.isra.0+0x1e4/0x310\\n[c000000007287d80] c00000000062858c sys_execve+0x4c/0x60\\n[c000000007287db0] c00000000002c1b0 system_call_exception+0x160/0x2c0\\n[c000000007287e10] c00000000000c53c system_call_common+0xec/0x250\\n\\nThe fix is to make sure we update high_memory on memory hotplug.\\nThis is similar to what x86 does in commit 3072e413e305 (\\\"mm/memory_hotplug: introduce add_pages\\\")\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:  powerpc/memhotplug: Add add_pages override for PPC With commit ffa0b64e3be5 (\\\"powerpc: Fix virt_addr_valid() for 64-bit Book3E \u0026amp; 32-bit\\\") the kernel now validate the addr against high_memory value. This results in the below BUG_ON with dax pfns. [ 635.798741][T26531] kernel BUG at mm/page_alloc.c:5521! 1:mon\u0026gt; e cpu 0x1: Vector: 700 (Program Check) at [c000000007287630] pc: c00000000055ed48: free_pages.part.0+0x48/0x110 lr: c00000000053ca70: tlb_finish_mmu+0x80/0xd0 sp: c0000000072878d0 msr: 800000000282b033 current = 0xc00000000afabe00 paca = 0xc00000037ffff300 irqmask: 0x03 irq_happened: 0x05 pid = 26531, comm = 50-landscape-sy kernel BUG at :5521! Linux version 5.19.0-rc3-14659-g4ec05be7c2e1 (kvaneesh@ltc-boston8) (gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #625 SMP Thu Jun 23 00:35:43 CDT 2022 1:mon\u0026gt; t [link register ] c00000000053ca70 tlb_finish_mmu+0x80/0xd0 [c0000000072878d0] c00000000053ca54 tlb_finish_mmu+0x64/0xd0 (unreliable) [c000000007287900] c000000000539424 exit_mmap+0xe4/0x2a0 [c0000000072879e0] c00000000019fc1c mmput+0xcc/0x210 [c000000007287a20] c000000000629230 begin_new_exec+0x5e0/0xf40 [c000000007287ae0] c00000000070b3cc load_elf_binary+0x3ac/0x1e00 [c000000007287c10] c000000000627af0 bprm_execve+0x3b0/0xaf0 [c000000007287cd0] c000000000628414 do_execveat_common.isra.0+0x1e4/0x310 [c000000007287d80] c00000000062858c sys_execve+0x4c/0x60 [c000000007287db0] c00000000002c1b0 system_call_exception+0x160/0x2c0 [c000000007287e10] c00000000000c53c system_call_common+0xec/0x250 The fix is to make sure we update high_memory on memory hotplug. This is similar to what x86 does in commit 3072e413e305 (\\\"mm/memory_hotplug: introduce add_pages\\\") \"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/powerpc/Kconfig\",\"arch/powerpc/mm/mem.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"fddb88bd266f4513abab7c36bca98935c9148a98\",\"lessThan\":\"89296ac435e2cf8a5101f7fab8f0c7b754b92052\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ffa0b64e3be58519ae472ea29a1a1ad681e32f48\",\"lessThan\":\"84d146fd35a01b08e9515041de60f0f915a417d5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ffa0b64e3be58519ae472ea29a1a1ad681e32f48\",\"lessThan\":\"ac790d09885d36143076e7e02825c541e8eee899\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"deab81144d5a043f42804207fb76cfbd8a806978\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d36febbcd537fcc50284e8b89609632d0146529f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a3727c25eacd7e437c4f560957fa3a376fe93e6b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cbc065efcba000ad8f615f506ebe61b6d3c5145b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.15.34\",\"lessThan\":\"5.15.53\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.190\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.10.111\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.16.20\",\"lessThan\":\"5.17\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.17.3\",\"lessThan\":\"5.18\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/powerpc/Kconfig\",\"arch/powerpc/mm/mem.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.53\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.18.10\",\"lessThanOrEqual\":\"5.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.19\",\"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:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.190\",\"versionEndExcluding\":\"5.5\",\"matchCriteriaId\":\"38031C07-F0BC-442A-A08F-FB9B732F2CA5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10.111\",\"versionEndExcluding\":\"5.11\",\"matchCriteriaId\":\"C35524B2-8E09-4BDE-B7AD-A957635B13DD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.15.34\",\"versionEndExcluding\":\"5.15.53\",\"matchCriteriaId\":\"D42BE58F-58A2-496A-927E-AFC735EC3FA1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16.20\",\"versionEndExcluding\":\"5.17\",\"matchCriteriaId\":\"0854057A-1882-4E17-8A6D-E294867B22EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17.3\",\"versionEndExcluding\":\"5.18\",\"matchCriteriaId\":\"A8771EE7-7703-460B-ABE5-ACA38B3F4E3D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.18.1\",\"versionEndExcluding\":\"5.18.10\",\"matchCriteriaId\":\"5328A76D-AEF6-4EFE-BEA4-B2B2E20E5A93\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"0384FA0A-DE99-48D7-84E3-46ED0C3B5E03\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.18:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"7AB06DDF-3C2B-416D-B448-E990D8FF67A9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.18:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"EAE6C6C5-4D21-4C04-897C-70CBBB3D7B91\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:14:46+00:00",
      "cve": "CVE-2022-49666",
      "id": "CVE-2022-49666",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:fixed": "201",
      "product_status:known_affected": "64",
      "product_status:known_not_affected": "124",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: powerpc/memhotplug: Add add_pages override for PPC",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49666.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T02:03:15Z",
      "cve": "CVE-2022-49666",
      "id": "CVE-2022-49666",
      "initial_release_date": "2025-02-27T03:03:11Z",
      "product_status:known_not_affected": "469",
      "product_status:recommended": "27",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49666",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49666.json",
      "version": "16"
    }
  }
}



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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.

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