cve-2022-48870
Vulnerability from cvelistv5
Published
2024-08-21 06:10
Modified
2024-12-19 08:09
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: fix possible null-ptr-defer in spk_ttyio_release Run the following tests on the qemu platform: syzkaller:~# modprobe speakup_audptr input: Speakup as /devices/virtual/input/input4 initialized device: /dev/synth, node (MAJOR 10, MINOR 125) speakup 3.1.6: initialized synth name on entry is: (null) synth probe spk_ttyio_initialise_ldisc failed because tty_kopen_exclusive returned failed (errno -16), then remove the module, we will get a null-ptr-defer problem, as follow: syzkaller:~# modprobe -r speakup_audptr releasing synth audptr BUG: kernel NULL pointer dereference, address: 0000000000000080 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 0 P4D 0 Oops: 0002 [#1] PREEMPT SMP PTI CPU: 2 PID: 204 Comm: modprobe Not tainted 6.1.0-rc6-dirty #1 RIP: 0010:mutex_lock+0x14/0x30 Call Trace: <TASK> spk_ttyio_release+0x19/0x70 [speakup] synth_release.part.6+0xac/0xc0 [speakup] synth_remove+0x56/0x60 [speakup] __x64_sys_delete_module+0x156/0x250 ? fpregs_assert_state_consistent+0x1d/0x50 do_syscall_64+0x37/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd </TASK> Modules linked in: speakup_audptr(-) speakup Dumping ftrace buffer: in_synth->dev was not initialized during modprobe, so we add check for in_synth->dev to fix this bug.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2da67bff29ab49caafb0766e8b8383b735ff796fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5abbeebd8296c2301023b8dc4b5a6c0d5229b4f5Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/64152e05a4de3ebf59f1740a0985a6d5fba0c77bPatch
Impacted products
Vendor Product Version
Linux Linux Version: 4f2a81f3a88217e7340b2cab5c0a5ebd0112514c
Version: 4f2a81f3a88217e7340b2cab5c0a5ebd0112514c
Version: 4f2a81f3a88217e7340b2cab5c0a5ebd0112514c
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   Linux Linux Version: 5.12
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{
   containers: {
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            metrics: [
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                  other: {
                     content: {
                        id: "CVE-2022-48870",
                        options: [
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                              Exploitation: "none",
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                           },
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                        role: "CISA Coordinator",
                        timestamp: "2024-09-10T16:05:32.027830Z",
                        version: "2.0.3",
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               orgId: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
               shortName: "CISA-ADP",
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            title: "CISA ADP Vulnrichment",
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      cna: {
         affected: [
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               defaultStatus: "unaffected",
               product: "Linux",
               programFiles: [
                  "drivers/accessibility/speakup/spk_ttyio.c",
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               value: "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: fix possible null-ptr-defer in spk_ttyio_release\n\nRun the following tests on the qemu platform:\n\nsyzkaller:~# modprobe speakup_audptr\n input: Speakup as /devices/virtual/input/input4\n initialized device: /dev/synth, node (MAJOR 10, MINOR 125)\n speakup 3.1.6: initialized\n synth name on entry is: (null)\n synth probe\n\nspk_ttyio_initialise_ldisc failed because tty_kopen_exclusive returned\nfailed (errno -16), then remove the module, we will get a null-ptr-defer\nproblem, as follow:\n\nsyzkaller:~# modprobe -r speakup_audptr\n releasing synth audptr\n BUG: kernel NULL pointer dereference, address: 0000000000000080\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD 0 P4D 0\n Oops: 0002 [#1] PREEMPT SMP PTI\n CPU: 2 PID: 204 Comm: modprobe Not tainted 6.1.0-rc6-dirty #1\n RIP: 0010:mutex_lock+0x14/0x30\n Call Trace:\n <TASK>\n  spk_ttyio_release+0x19/0x70 [speakup]\n  synth_release.part.6+0xac/0xc0 [speakup]\n  synth_remove+0x56/0x60 [speakup]\n  __x64_sys_delete_module+0x156/0x250\n  ? fpregs_assert_state_consistent+0x1d/0x50\n  do_syscall_64+0x37/0x90\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n </TASK>\n Modules linked in: speakup_audptr(-) speakup\n Dumping ftrace buffer:\n\nin_synth->dev was not initialized during modprobe, so we add check\nfor in_synth->dev to fix this bug.",
            },
         ],
         providerMetadata: {
            dateUpdated: "2024-12-19T08:09:33.340Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
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            {
               url: "https://git.kernel.org/stable/c/5abbeebd8296c2301023b8dc4b5a6c0d5229b4f5",
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         title: "tty: fix possible null-ptr-defer in spk_ttyio_release",
         x_generator: {
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   cveMetadata: {
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      assignerShortName: "Linux",
      cveId: "CVE-2022-48870",
      datePublished: "2024-08-21T06:10:00.678Z",
      dateReserved: "2024-07-16T11:38:08.921Z",
      dateUpdated: "2024-12-19T08:09:33.340Z",
      state: "PUBLISHED",
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   dataType: "CVE_RECORD",
   dataVersion: "5.1",
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      nvd: "{\"cve\":{\"id\":\"CVE-2022-48870\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-21T07:15:04.143\",\"lastModified\":\"2024-09-06T14:20:52.290\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntty: fix possible null-ptr-defer in spk_ttyio_release\\n\\nRun the following tests on the qemu platform:\\n\\nsyzkaller:~# modprobe speakup_audptr\\n input: Speakup as /devices/virtual/input/input4\\n initialized device: /dev/synth, node (MAJOR 10, MINOR 125)\\n speakup 3.1.6: initialized\\n synth name on entry is: (null)\\n synth probe\\n\\nspk_ttyio_initialise_ldisc failed because tty_kopen_exclusive returned\\nfailed (errno -16), then remove the module, we will get a null-ptr-defer\\nproblem, as follow:\\n\\nsyzkaller:~# modprobe -r speakup_audptr\\n releasing synth audptr\\n BUG: kernel NULL pointer dereference, address: 0000000000000080\\n #PF: supervisor write access in kernel mode\\n #PF: error_code(0x0002) - not-present page\\n PGD 0 P4D 0\\n Oops: 0002 [#1] PREEMPT SMP PTI\\n CPU: 2 PID: 204 Comm: modprobe Not tainted 6.1.0-rc6-dirty #1\\n RIP: 0010:mutex_lock+0x14/0x30\\n Call Trace:\\n <TASK>\\n  spk_ttyio_release+0x19/0x70 [speakup]\\n  synth_release.part.6+0xac/0xc0 [speakup]\\n  synth_remove+0x56/0x60 [speakup]\\n  __x64_sys_delete_module+0x156/0x250\\n  ? fpregs_assert_state_consistent+0x1d/0x50\\n  do_syscall_64+0x37/0x90\\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n </TASK>\\n Modules linked in: speakup_audptr(-) speakup\\n Dumping ftrace buffer:\\n\\nin_synth->dev was not initialized during modprobe, so we add check\\nfor in_synth->dev to fix this bug.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tty: corrige posible null-ptr-defer en spk_ttyio_release Ejecute las siguientes pruebas en la plataforma qemu: syzkaller:~# modprobe Speakup_audptr input: Speakup as /devices/virtual/input/input4 dispositivo inicializado: /dev/synth, nodo (MAJOR 10, MINOR 125) Speakup 3.1.6: el nombre del sintetizador inicializado en la entrada es: (nulo) la sonda de sintetizador spk_ttyio_initialise_ldisc falló porque tty_kopen_exclusive devolvió un error (errno -16), luego elimine el módulo, obtendremos un problema de aplazamiento de ptr nulo, como sigue: syzkaller:~# modprobe -r Speakup_audptr liberando sintetizador audptr ERROR: desreferencia del puntero NULL del kernel, dirección: 00000000000000080 #PF: acceso de escritura del supervisor en modo kernel #PF: código_error(0x0002 ) - página no presente PGD 0 P4D 0 Ups: 0002 [#1] PREEMPT SMP PTI CPU: 2 PID: 204 Comm: modprobe No contaminado 6.1.0-rc6-dirty #1 RIP: 0010:mutex_lock+0x14/0x30 Llamada Seguimiento:  spk_ttyio_release+0x19/0x70 [speakup] synth_release.part.6+0xac/0xc0 [speakup] synth_remove+0x56/0x60 [speakup] __x64_sys_delete_module+0x156/0x250? fpregs_assert_state_consistent+0x1d/0x50 do_syscall_64+0x37/0x90 entry_syscall_64_after_hwframe+0x63/0xcd  módulos vinculados en: sheakup_audptr (-) volcando ftrace búfer: in_synth-&gt;&gt; nth-&gt; dev para corregir este error.\"}],\"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\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.12\",\"versionEndExcluding\":\"5.15.90\",\"matchCriteriaId\":\"82544A71-562D-4C2F-B75E-7193C3B97CD0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.8\",\"matchCriteriaId\":\"A6AFE6C9-3F59-4711-B2CF-7D6682FF6BD0\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2da67bff29ab49caafb0766e8b8383b735ff796f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5abbeebd8296c2301023b8dc4b5a6c0d5229b4f5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/64152e05a4de3ebf59f1740a0985a6d5fba0c77b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
      vulnrichment: {
         containers: "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-48870\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:05:32.027830Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:11.943Z\"}}], \"cna\": {\"title\": \"tty: fix possible null-ptr-defer in spk_ttyio_release\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4f2a81f3a88217e7340b2cab5c0a5ebd0112514c\", \"lessThan\": \"2da67bff29ab49caafb0766e8b8383b735ff796f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4f2a81f3a88217e7340b2cab5c0a5ebd0112514c\", \"lessThan\": \"64152e05a4de3ebf59f1740a0985a6d5fba0c77b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4f2a81f3a88217e7340b2cab5c0a5ebd0112514c\", \"lessThan\": \"5abbeebd8296c2301023b8dc4b5a6c0d5229b4f5\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/accessibility/speakup/spk_ttyio.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.90\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/accessibility/speakup/spk_ttyio.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2da67bff29ab49caafb0766e8b8383b735ff796f\"}, {\"url\": \"https://git.kernel.org/stable/c/64152e05a4de3ebf59f1740a0985a6d5fba0c77b\"}, {\"url\": \"https://git.kernel.org/stable/c/5abbeebd8296c2301023b8dc4b5a6c0d5229b4f5\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntty: fix possible null-ptr-defer in spk_ttyio_release\\n\\nRun the following tests on the qemu platform:\\n\\nsyzkaller:~# modprobe speakup_audptr\\n input: Speakup as /devices/virtual/input/input4\\n initialized device: /dev/synth, node (MAJOR 10, MINOR 125)\\n speakup 3.1.6: initialized\\n synth name on entry is: (null)\\n synth probe\\n\\nspk_ttyio_initialise_ldisc failed because tty_kopen_exclusive returned\\nfailed (errno -16), then remove the module, we will get a null-ptr-defer\\nproblem, as follow:\\n\\nsyzkaller:~# modprobe -r speakup_audptr\\n releasing synth audptr\\n BUG: kernel NULL pointer dereference, address: 0000000000000080\\n #PF: supervisor write access in kernel mode\\n #PF: error_code(0x0002) - not-present page\\n PGD 0 P4D 0\\n Oops: 0002 [#1] PREEMPT SMP PTI\\n CPU: 2 PID: 204 Comm: modprobe Not tainted 6.1.0-rc6-dirty #1\\n RIP: 0010:mutex_lock+0x14/0x30\\n Call Trace:\\n <TASK>\\n  spk_ttyio_release+0x19/0x70 [speakup]\\n  synth_release.part.6+0xac/0xc0 [speakup]\\n  synth_remove+0x56/0x60 [speakup]\\n  __x64_sys_delete_module+0x156/0x250\\n  ? fpregs_assert_state_consistent+0x1d/0x50\\n  do_syscall_64+0x37/0x90\\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n </TASK>\\n Modules linked in: speakup_audptr(-) speakup\\n Dumping ftrace buffer:\\n\\nin_synth->dev was not initialized during modprobe, so we add check\\nfor in_synth->dev to fix this bug.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T08:09:33.340Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2022-48870\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T08:09:33.340Z\", \"dateReserved\": \"2024-07-16T11:38:08.921Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-08-21T06:10:00.678Z\", \"assignerShortName\": \"Linux\"}",
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}


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