CVE-2022-49851 (GCVE-0-2022-49851)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2026-05-23 15:22
VLAI
Title
riscv: fix reserved memory setup
Summary
In the Linux kernel, the following vulnerability has been resolved: riscv: fix reserved memory setup Currently, RISC-V sets up reserved memory using the "early" copy of the device tree. As a result, when trying to get a reserved memory region using of_reserved_mem_lookup(), the pointer to reserved memory regions is using the early, pre-virtual-memory address which causes a kernel panic when trying to use the buffer's name: Unable to handle kernel paging request at virtual address 00000000401c31ac Oops [#1] Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 6.0.0-rc1-00001-g0d9d6953d834 #1 Hardware name: Microchip PolarFire-SoC Icicle Kit (DT) epc : string+0x4a/0xea ra : vsnprintf+0x1e4/0x336 epc : ffffffff80335ea0 ra : ffffffff80338936 sp : ffffffff81203be0 gp : ffffffff812e0a98 tp : ffffffff8120de40 t0 : 0000000000000000 t1 : ffffffff81203e28 t2 : 7265736572203a46 s0 : ffffffff81203c20 s1 : ffffffff81203e28 a0 : ffffffff81203d22 a1 : 0000000000000000 a2 : ffffffff81203d08 a3 : 0000000081203d21 a4 : ffffffffffffffff a5 : 00000000401c31ac a6 : ffff0a00ffffff04 a7 : ffffffffffffffff s2 : ffffffff81203d08 s3 : ffffffff81203d00 s4 : 0000000000000008 s5 : ffffffff000000ff s6 : 0000000000ffffff s7 : 00000000ffffff00 s8 : ffffffff80d9821a s9 : ffffffff81203d22 s10: 0000000000000002 s11: ffffffff80d9821c t3 : ffffffff812f3617 t4 : ffffffff812f3617 t5 : ffffffff812f3618 t6 : ffffffff81203d08 status: 0000000200000100 badaddr: 00000000401c31ac cause: 000000000000000d [<ffffffff80338936>] vsnprintf+0x1e4/0x336 [<ffffffff80055ae2>] vprintk_store+0xf6/0x344 [<ffffffff80055d86>] vprintk_emit+0x56/0x192 [<ffffffff80055ed8>] vprintk_default+0x16/0x1e [<ffffffff800563d2>] vprintk+0x72/0x80 [<ffffffff806813b2>] _printk+0x36/0x50 [<ffffffff8068af48>] print_reserved_mem+0x1c/0x24 [<ffffffff808057ec>] paging_init+0x528/0x5bc [<ffffffff808031ae>] setup_arch+0xd0/0x592 [<ffffffff8080070e>] start_kernel+0x82/0x73c early_init_fdt_scan_reserved_mem() takes no arguments as it operates on initial_boot_params, which is populated by early_init_dt_verify(). On RISC-V, early_init_dt_verify() is called twice. Once, directly, in setup_arch() if CONFIG_BUILTIN_DTB is not enabled and once indirectly, very early in the boot process, by parse_dtb() when it calls early_init_dt_scan_nodes(). This first call uses dtb_early_va to set initial_boot_params, which is not usable later in the boot process when early_init_fdt_scan_reserved_mem() is called. On arm64 for example, the corresponding call to early_init_dt_scan_nodes() uses fixmap addresses and doesn't suffer the same fate. Move early_init_fdt_scan_reserved_mem() further along the boot sequence, after the direct call to early_init_dt_verify() in setup_arch() so that the names use the correct virtual memory addresses. The above supposed that CONFIG_BUILTIN_DTB was not set, but should work equally in the case where it is - unflatted_and_copy_device_tree() also updates initial_boot_params.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 922b0375fc93fb1a20c5617e37c389c26bbccb70 , < 94ab8f88feb75e3b1486102c0c9c550f37d9d137 (git)
Affected: 922b0375fc93fb1a20c5617e37c389c26bbccb70 , < 518e49f0590de66555503aabe199ba8d3f2e24ac (git)
Affected: 922b0375fc93fb1a20c5617e37c389c26bbccb70 , < 93598deb101540c4f9e7de15099ea8255b965fc2 (git)
Affected: 922b0375fc93fb1a20c5617e37c389c26bbccb70 , < 50e63dd8ed92045eb70a72d7ec725488320fb68b (git)
Affected: f18ed5bee7bb8a0e99e1c7e7d45e0e51d3497248 (git)
Affected: 5.3.8 , < 5.4 (semver)
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Linux Linux Affected: 5.4
Unaffected: 0 , < 5.4 (semver)
Unaffected: 5.10.155 , ≤ 5.10.* (semver)
Unaffected: 5.15.79 , ≤ 5.15.* (semver)
Unaffected: 6.0.9 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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            "arch/riscv/mm/init.c"
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          "vendor": "Linux",
          "versions": [
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: fix reserved memory setup\n\nCurrently, RISC-V sets up reserved memory using the \"early\" copy of the\ndevice tree. As a result, when trying to get a reserved memory region\nusing of_reserved_mem_lookup(), the pointer to reserved memory regions\nis using the early, pre-virtual-memory address which causes a kernel\npanic when trying to use the buffer\u0027s name:\n\n Unable to handle kernel paging request at virtual address 00000000401c31ac\n Oops [#1]\n Modules linked in:\n CPU: 0 PID: 0 Comm: swapper Not tainted 6.0.0-rc1-00001-g0d9d6953d834 #1\n Hardware name: Microchip PolarFire-SoC Icicle Kit (DT)\n epc : string+0x4a/0xea\n  ra : vsnprintf+0x1e4/0x336\n epc : ffffffff80335ea0 ra : ffffffff80338936 sp : ffffffff81203be0\n  gp : ffffffff812e0a98 tp : ffffffff8120de40 t0 : 0000000000000000\n  t1 : ffffffff81203e28 t2 : 7265736572203a46 s0 : ffffffff81203c20\n  s1 : ffffffff81203e28 a0 : ffffffff81203d22 a1 : 0000000000000000\n  a2 : ffffffff81203d08 a3 : 0000000081203d21 a4 : ffffffffffffffff\n  a5 : 00000000401c31ac a6 : ffff0a00ffffff04 a7 : ffffffffffffffff\n  s2 : ffffffff81203d08 s3 : ffffffff81203d00 s4 : 0000000000000008\n  s5 : ffffffff000000ff s6 : 0000000000ffffff s7 : 00000000ffffff00\n  s8 : ffffffff80d9821a s9 : ffffffff81203d22 s10: 0000000000000002\n  s11: ffffffff80d9821c t3 : ffffffff812f3617 t4 : ffffffff812f3617\n  t5 : ffffffff812f3618 t6 : ffffffff81203d08\n status: 0000000200000100 badaddr: 00000000401c31ac cause: 000000000000000d\n [\u003cffffffff80338936\u003e] vsnprintf+0x1e4/0x336\n [\u003cffffffff80055ae2\u003e] vprintk_store+0xf6/0x344\n [\u003cffffffff80055d86\u003e] vprintk_emit+0x56/0x192\n [\u003cffffffff80055ed8\u003e] vprintk_default+0x16/0x1e\n [\u003cffffffff800563d2\u003e] vprintk+0x72/0x80\n [\u003cffffffff806813b2\u003e] _printk+0x36/0x50\n [\u003cffffffff8068af48\u003e] print_reserved_mem+0x1c/0x24\n [\u003cffffffff808057ec\u003e] paging_init+0x528/0x5bc\n [\u003cffffffff808031ae\u003e] setup_arch+0xd0/0x592\n [\u003cffffffff8080070e\u003e] start_kernel+0x82/0x73c\n\nearly_init_fdt_scan_reserved_mem() takes no arguments as it operates on\ninitial_boot_params, which is populated by early_init_dt_verify(). On\nRISC-V, early_init_dt_verify() is called twice. Once, directly, in\nsetup_arch() if CONFIG_BUILTIN_DTB is not enabled and once indirectly,\nvery early in the boot process, by parse_dtb() when it calls\nearly_init_dt_scan_nodes().\n\nThis first call uses dtb_early_va to set initial_boot_params, which is\nnot usable later in the boot process when\nearly_init_fdt_scan_reserved_mem() is called. On arm64 for example, the\ncorresponding call to early_init_dt_scan_nodes() uses fixmap addresses\nand doesn\u0027t suffer the same fate.\n\nMove early_init_fdt_scan_reserved_mem() further along the boot sequence,\nafter the direct call to early_init_dt_verify() in setup_arch() so that\nthe names use the correct virtual memory addresses. The above supposed\nthat CONFIG_BUILTIN_DTB was not set, but should work equally in the case\nwhere it is - unflatted_and_copy_device_tree() also updates\ninitial_boot_params."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:22:59.677Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/94ab8f88feb75e3b1486102c0c9c550f37d9d137"
        },
        {
          "url": "https://git.kernel.org/stable/c/518e49f0590de66555503aabe199ba8d3f2e24ac"
        },
        {
          "url": "https://git.kernel.org/stable/c/93598deb101540c4f9e7de15099ea8255b965fc2"
        },
        {
          "url": "https://git.kernel.org/stable/c/50e63dd8ed92045eb70a72d7ec725488320fb68b"
        }
      ],
      "title": "riscv: fix reserved memory setup",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49851",
    "datePublished": "2025-05-01T14:10:06.274Z",
    "dateReserved": "2025-05-01T14:05:17.230Z",
    "dateUpdated": "2026-05-23T15:22:59.677Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49851",
      "date": "2026-07-26",
      "epss": "0.00182",
      "percentile": "0.08009"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49851\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:08.680\",\"lastModified\":\"2026-06-17T05:19:18.380\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nriscv: fix reserved memory setup\\n\\nCurrently, RISC-V sets up reserved memory using the \\\"early\\\" copy of the\\ndevice tree. As a result, when trying to get a reserved memory region\\nusing of_reserved_mem_lookup(), the pointer to reserved memory regions\\nis using the early, pre-virtual-memory address which causes a kernel\\npanic when trying to use the buffer\u0027s name:\\n\\n Unable to handle kernel paging request at virtual address 00000000401c31ac\\n Oops [#1]\\n Modules linked in:\\n CPU: 0 PID: 0 Comm: swapper Not tainted 6.0.0-rc1-00001-g0d9d6953d834 #1\\n Hardware name: Microchip PolarFire-SoC Icicle Kit (DT)\\n epc : string+0x4a/0xea\\n  ra : vsnprintf+0x1e4/0x336\\n epc : ffffffff80335ea0 ra : ffffffff80338936 sp : ffffffff81203be0\\n  gp : ffffffff812e0a98 tp : ffffffff8120de40 t0 : 0000000000000000\\n  t1 : ffffffff81203e28 t2 : 7265736572203a46 s0 : ffffffff81203c20\\n  s1 : ffffffff81203e28 a0 : ffffffff81203d22 a1 : 0000000000000000\\n  a2 : ffffffff81203d08 a3 : 0000000081203d21 a4 : ffffffffffffffff\\n  a5 : 00000000401c31ac a6 : ffff0a00ffffff04 a7 : ffffffffffffffff\\n  s2 : ffffffff81203d08 s3 : ffffffff81203d00 s4 : 0000000000000008\\n  s5 : ffffffff000000ff s6 : 0000000000ffffff s7 : 00000000ffffff00\\n  s8 : ffffffff80d9821a s9 : ffffffff81203d22 s10: 0000000000000002\\n  s11: ffffffff80d9821c t3 : ffffffff812f3617 t4 : ffffffff812f3617\\n  t5 : ffffffff812f3618 t6 : ffffffff81203d08\\n status: 0000000200000100 badaddr: 00000000401c31ac cause: 000000000000000d\\n [\u003cffffffff80338936\u003e] vsnprintf+0x1e4/0x336\\n [\u003cffffffff80055ae2\u003e] vprintk_store+0xf6/0x344\\n [\u003cffffffff80055d86\u003e] vprintk_emit+0x56/0x192\\n [\u003cffffffff80055ed8\u003e] vprintk_default+0x16/0x1e\\n [\u003cffffffff800563d2\u003e] vprintk+0x72/0x80\\n [\u003cffffffff806813b2\u003e] _printk+0x36/0x50\\n [\u003cffffffff8068af48\u003e] print_reserved_mem+0x1c/0x24\\n [\u003cffffffff808057ec\u003e] paging_init+0x528/0x5bc\\n [\u003cffffffff808031ae\u003e] setup_arch+0xd0/0x592\\n [\u003cffffffff8080070e\u003e] start_kernel+0x82/0x73c\\n\\nearly_init_fdt_scan_reserved_mem() takes no arguments as it operates on\\ninitial_boot_params, which is populated by early_init_dt_verify(). On\\nRISC-V, early_init_dt_verify() is called twice. Once, directly, in\\nsetup_arch() if CONFIG_BUILTIN_DTB is not enabled and once indirectly,\\nvery early in the boot process, by parse_dtb() when it calls\\nearly_init_dt_scan_nodes().\\n\\nThis first call uses dtb_early_va to set initial_boot_params, which is\\nnot usable later in the boot process when\\nearly_init_fdt_scan_reserved_mem() is called. On arm64 for example, the\\ncorresponding call to early_init_dt_scan_nodes() uses fixmap addresses\\nand doesn\u0027t suffer the same fate.\\n\\nMove early_init_fdt_scan_reserved_mem() further along the boot sequence,\\nafter the direct call to early_init_dt_verify() in setup_arch() so that\\nthe names use the correct virtual memory addresses. The above supposed\\nthat CONFIG_BUILTIN_DTB was not set, but should work equally in the case\\nwhere it is - unflatted_and_copy_device_tree() also updates\\ninitial_boot_params.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: riscv: correcci\u00f3n de la configuraci\u00f3n de memoria reservada Actualmente, RISC-V configura la memoria reservada utilizando la copia \\\"temprana\\\" del \u00e1rbol de dispositivos. Como resultado, al intentar obtener una regi\u00f3n de memoria reservada usando of_reserved_mem_lookup(), el puntero a las regiones de memoria reservadas usa la direcci\u00f3n anterior a la memoria virtual, lo que causa un p\u00e1nico del kernel al intentar usar el nombre del b\u00fafer: Unable to handle kernel paging request at virtual address 00000000401c31ac Oops [#1] M\u00f3dulos vinculados: CPU: 0 PID: 0 Comm: swapper Not tainted 6.0.0-rc1-00001-g0d9d6953d834 #1 Nombre del hardware: Microchip PolarFire-SoC Icicle Kit (DT) epc : string+0x4a/0xea ra : vsnprintf+0x1e4/0x336 epc : ffffffff80335ea0 ra : ffffffff80338936 sp : ffffffff81203be0 gp: ffffffff812e0a98 tp: ffffffff8120de40 t0: 0000000000000000 t1: ffffffff81203e28 t2: 7265736572203a46 s0: ffffffff81203c20 s1: ffffffff81203e28 a0: ffffffff81203d22 a1: 0000000000000000 a2: ffffffff81203d08 a3: 0000000081203d21 a4: ffffffffffffffff a5: 00000000401c31ac a6 : ffff0a00ffffff04 a7 : ffffffffffffffff s2 : ffffffff81203d08 s3 : ffffffff81203d00 s4 : 0000000000000008 s5 : ffffffff000000ff s6 : 0000000000ffffff s7 : 00000000ffffff00 s8 : ffffffff80d9821a s9 : ffffffff81203d22 s10: 000000000000002 s11: ffffffff80d9821c t3 : ffffffff812f3617 t4: ffffffff812f3617 t5: ffffffff812f3618 t6: ffffffff81203d08 estado: 0000000200000100 direcci\u00f3n incorrecta: 00000000401c31ac causa: 000000000000000d [] vsnprintf+0x1e4/0x336 [] vprintk_store+0xf6/0x344 [] vprintk_emit+0x56/0x192 [] vprintk_default+0x16/0x1e [] vprintk+0x72/0x80 [] _printk+0x36/0x50 [] print_reserved_mem+0x1c/0x24 [] paging_init+0x528/0x5bc [] setup_arch+0xd0/0x592 [] start_kernel+0x82/0x73c early_init_fdt_scan_reserved_mem() no toma argumentos ya que opera en initial_boot_params, que se completa con early_init_dt_verify(). En RISC-V, early_init_dt_verify() se llama dos veces: una directamente, en setup_arch() si CONFIG_BUILTIN_DTB no est\u00e1 habilitado, y otra indirectamente, en una fase muy temprana del proceso de arranque, mediante parse_dtb() al llamar a early_init_dt_scan_nodes(). Esta primera llamada utiliza dtb_early_va para establecer initial_boot_params, que no se puede utilizar posteriormente en el proceso de arranque cuando se llama a early_init_fdt_scan_reserved_mem(). En arm64, por ejemplo, la llamada correspondiente a early_init_dt_scan_nodes() utiliza direcciones fixmap y no sufre el mismo problema. Desplace early_init_fdt_scan_reserved_mem() m\u00e1s adelante en la secuencia de arranque, despu\u00e9s de la llamada directa a early_init_dt_verify() en setup_arch() para que los nombres utilicen las direcciones de memoria virtual correctas. Lo anterior supuso que CONFIG_BUILTIN_DTB no estaba configurado, pero deber\u00eda funcionar igualmente en el caso en que lo est\u00e9: unflatted_and_copy_device_tree() tambi\u00e9n actualiza initial_boot_params.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/riscv/kernel/setup.c\",\"arch/riscv/mm/init.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"922b0375fc93fb1a20c5617e37c389c26bbccb70\",\"lessThan\":\"94ab8f88feb75e3b1486102c0c9c550f37d9d137\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"922b0375fc93fb1a20c5617e37c389c26bbccb70\",\"lessThan\":\"518e49f0590de66555503aabe199ba8d3f2e24ac\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"922b0375fc93fb1a20c5617e37c389c26bbccb70\",\"lessThan\":\"93598deb101540c4f9e7de15099ea8255b965fc2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"922b0375fc93fb1a20c5617e37c389c26bbccb70\",\"lessThan\":\"50e63dd8ed92045eb70a72d7ec725488320fb68b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f18ed5bee7bb8a0e99e1c7e7d45e0e51d3497248\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.3.8\",\"lessThan\":\"5.4\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/riscv/kernel/setup.c\",\"arch/riscv/mm/init.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.4\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.4\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.155\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.79\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.0.9\",\"lessThanOrEqual\":\"6.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1\",\"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:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.3.8\",\"versionEndExcluding\":\"5.4\",\"matchCriteriaId\":\"427ABFB4-D713-4023-A92C-151DC0A30CCC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.4.1\",\"versionEndExcluding\":\"5.10.155\",\"matchCriteriaId\":\"66D4AEE6-9821-4CD6-AB4D-DF78352338CF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.79\",\"matchCriteriaId\":\"39DC45D8-E30E-4F4A-9332-393B7BCF6900\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.0.9\",\"matchCriteriaId\":\"C3F26709-7D49-4AF0-8145-46CCF4E8E2AD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.4:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"4D70AB13-37BE-4BD3-A652-10191F1642E4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.4:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"DCF307A4-6CF2-43FA-94E5-2EBB1033634B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.4:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"72D64137-DAA7-40C0-8BAD-9DBCB285BC00\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.4:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"81C1EF68-9FF9-416E-AFED-59088978150A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.4:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"F0E28D41-AC78-413B-AA08-FB73CAFFC58C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.4:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"EEDE6F28-7530-476B-A838-83E5B2D2A2DD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.4:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"7BB18ED4-6619-467C-870F-7671261DBEF2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.4:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"D980DAA0-07F8-4C47-B178-0BDDDA234A06\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E7E331DA-1FB0-4DEC-91AC-7DA69D461C11\"},{\"vulnerable\":true,\"cri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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:21:27+00:00",
      "cve": "CVE-2022-49851",
      "id": "CVE-2022-49851",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: riscv: fix reserved memory setup",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49851.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-25T17:10:52Z",
      "cve": "CVE-2022-49851",
      "id": "CVE-2022-49851",
      "initial_release_date": "2025-05-06T03:07:21Z",
      "product_status:known_not_affected": "402",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49851",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49851.json",
      "version": "9"
    }
  }
}



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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.