cve-2024-46786
Vulnerability from cvelistv5
Published
2024-09-18 07:12
Modified
2024-12-19 09:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: fscache: delete fscache_cookie_lru_timer when fscache exits to avoid UAF The fscache_cookie_lru_timer is initialized when the fscache module is inserted, but is not deleted when the fscache module is removed. If timer_reduce() is called before removing the fscache module, the fscache_cookie_lru_timer will be added to the timer list of the current cpu. Afterwards, a use-after-free will be triggered in the softIRQ after removing the fscache module, as follows: ================================================================== BUG: unable to handle page fault for address: fffffbfff803c9e9 PF: supervisor read access in kernel mode PF: error_code(0x0000) - not-present page PGD 21ffea067 P4D 21ffea067 PUD 21ffe6067 PMD 110a7c067 PTE 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W 6.11.0-rc3 #855 Tainted: [W]=WARN RIP: 0010:__run_timer_base.part.0+0x254/0x8a0 Call Trace: <IRQ> tmigr_handle_remote_up+0x627/0x810 __walk_groups.isra.0+0x47/0x140 tmigr_handle_remote+0x1fa/0x2f0 handle_softirqs+0x180/0x590 irq_exit_rcu+0x84/0xb0 sysvec_apic_timer_interrupt+0x6e/0x90 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:default_idle+0xf/0x20 default_idle_call+0x38/0x60 do_idle+0x2b5/0x300 cpu_startup_entry+0x54/0x60 start_secondary+0x20d/0x280 common_startup_64+0x13e/0x148 </TASK> Modules linked in: [last unloaded: netfs] ================================================================== Therefore delete fscache_cookie_lru_timer when removing the fscahe module.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0a11262549ac2ac6fb98c7cd40a67136817e5a52Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/72a6e22c604c95ddb3b10b5d3bb85b6ff4dbc34fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e0d724932ad12e3528f4ce97fc0f6078d0cce4bcPatch
Impacted products
Vendor Product Version
Linux Linux Version: 5.17
Show details on NVD website

To clipboard 

{
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            "other": {
              "content": {
                "id": "CVE-2024-46786",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-29T14:29:09.431104Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-29T14:29:24.241Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/fscache_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "e0d724932ad12e3528f4ce97fc0f6078d0cce4bc",
              "status": "affected",
              "version": "12bb21a29c19aae50cfad4e2bb5c943108f34a7d",
              "versionType": "git"
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          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/fscache_main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.17"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "lessThanOrEqual": "6.6.*",
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              "version": "6.6.51",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.10",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.11",
              "versionType": "original_commit_for_fix"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfscache: delete fscache_cookie_lru_timer when fscache exits to avoid UAF\n\nThe fscache_cookie_lru_timer is initialized when the fscache module\nis inserted, but is not deleted when the fscache module is removed.\nIf timer_reduce() is called before removing the fscache module,\nthe fscache_cookie_lru_timer will be added to the timer list of\nthe current cpu. Afterwards, a use-after-free will be triggered\nin the softIRQ after removing the fscache module, as follows:\n\n==================================================================\nBUG: unable to handle page fault for address: fffffbfff803c9e9\n PF: supervisor read access in kernel mode\n PF: error_code(0x0000) - not-present page\nPGD 21ffea067 P4D 21ffea067 PUD 21ffe6067 PMD 110a7c067 PTE 0\nOops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W 6.11.0-rc3 #855\nTainted: [W]=WARN\nRIP: 0010:__run_timer_base.part.0+0x254/0x8a0\nCall Trace:\n \u003cIRQ\u003e\n tmigr_handle_remote_up+0x627/0x810\n __walk_groups.isra.0+0x47/0x140\n tmigr_handle_remote+0x1fa/0x2f0\n handle_softirqs+0x180/0x590\n irq_exit_rcu+0x84/0xb0\n sysvec_apic_timer_interrupt+0x6e/0x90\n \u003c/IRQ\u003e\n \u003cTASK\u003e\n asm_sysvec_apic_timer_interrupt+0x1a/0x20\nRIP: 0010:default_idle+0xf/0x20\n default_idle_call+0x38/0x60\n do_idle+0x2b5/0x300\n cpu_startup_entry+0x54/0x60\n start_secondary+0x20d/0x280\n common_startup_64+0x13e/0x148\n \u003c/TASK\u003e\nModules linked in: [last unloaded: netfs]\n==================================================================\n\nTherefore delete fscache_cookie_lru_timer when removing the fscahe module."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T09:23:07.418Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/e0d724932ad12e3528f4ce97fc0f6078d0cce4bc"
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          "url": "https://git.kernel.org/stable/c/0a11262549ac2ac6fb98c7cd40a67136817e5a52"
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        {
          "url": "https://git.kernel.org/stable/c/72a6e22c604c95ddb3b10b5d3bb85b6ff4dbc34f"
        }
      ],
      "title": "fscache: delete fscache_cookie_lru_timer when fscache exits to avoid UAF",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-46786",
    "datePublished": "2024-09-18T07:12:42.332Z",
    "dateReserved": "2024-09-11T15:12:18.277Z",
    "dateUpdated": "2024-12-19T09:23:07.418Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-46786\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-09-18T08:15:05.783\",\"lastModified\":\"2024-09-26T12:48:37.447\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfscache: delete fscache_cookie_lru_timer when fscache exits to avoid UAF\\n\\nThe fscache_cookie_lru_timer is initialized when the fscache module\\nis inserted, but is not deleted when the fscache module is removed.\\nIf timer_reduce() is called before removing the fscache module,\\nthe fscache_cookie_lru_timer will be added to the timer list of\\nthe current cpu. Afterwards, a use-after-free will be triggered\\nin the softIRQ after removing the fscache module, as follows:\\n\\n==================================================================\\nBUG: unable to handle page fault for address: fffffbfff803c9e9\\n PF: supervisor read access in kernel mode\\n PF: error_code(0x0000) - not-present page\\nPGD 21ffea067 P4D 21ffea067 PUD 21ffe6067 PMD 110a7c067 PTE 0\\nOops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI\\nCPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G W 6.11.0-rc3 #855\\nTainted: [W]=WARN\\nRIP: 0010:__run_timer_base.part.0+0x254/0x8a0\\nCall Trace:\\n \u003cIRQ\u003e\\n tmigr_handle_remote_up+0x627/0x810\\n __walk_groups.isra.0+0x47/0x140\\n tmigr_handle_remote+0x1fa/0x2f0\\n handle_softirqs+0x180/0x590\\n irq_exit_rcu+0x84/0xb0\\n sysvec_apic_timer_interrupt+0x6e/0x90\\n \u003c/IRQ\u003e\\n \u003cTASK\u003e\\n asm_sysvec_apic_timer_interrupt+0x1a/0x20\\nRIP: 0010:default_idle+0xf/0x20\\n default_idle_call+0x38/0x60\\n do_idle+0x2b5/0x300\\n cpu_startup_entry+0x54/0x60\\n start_secondary+0x20d/0x280\\n common_startup_64+0x13e/0x148\\n \u003c/TASK\u003e\\nModules linked in: [last unloaded: netfs]\\n==================================================================\\n\\nTherefore delete fscache_cookie_lru_timer when removing the fscahe module.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fscache: eliminar fscache_cookie_lru_timer cuando fscache sale para evitar UAF fscache_cookie_lru_timer se inicializa cuando se inserta el m\u00f3dulo fscache, pero no se elimina cuando se elimina el m\u00f3dulo fscache. Si se llama a timer_reduce() antes de eliminar el m\u00f3dulo fscache, fscache_cookie_lru_timer se agregar\u00e1 a la lista de temporizadores de la CPU actual. Posteriormente, se activar\u00e1 un use after free en el softIRQ despu\u00e9s de quitar el m\u00f3dulo fscache, de la siguiente manera: ======================================================================== ERROR: no se puede manejar el error de p\u00e1gina para la direcci\u00f3n: fffffbfff803c9e9 PF: acceso de lectura del supervisor en modo kernel PF: error_code(0x0000) - p\u00e1gina no presente PGD 21ffea067 P4D 21ffea067 PUD 21ffe6067 PMD 110a7c067 PTE 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Contaminado: GW 6.11.0-rc3 #855 Contaminado: [W]=ADVERTENCIA RIP: 0010:__run_timer_base.part.0+0x254/0x8a0 Rastreo de llamadas:  tmigr_handle_remote_up+0x627/0x810 __walk_groups.isra.0+0x47/0x140 tmigr_handle_remote+0x1fa/0x2f0 handle_softirqs+0x180/0x590 irq_exit_rcu+0x84/0xb0 sysvec_apic_timer_interrupt+0x6e/0x90   asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:default_idle+0xf/0x20 default_idle_call+0x38/0x60 do_idle+0x2b5/0x300 cpu_startup_entry+0x54/0x60 start_secondary+0x20d/0x280 common_startup_64+0x13e/0x148  M\u00f3dulos vinculados en: [\u00faltima descarga: netfs] ======================================================================= Por lo tanto, elimine fscache_cookie_lru_timer al eliminar el m\u00f3dulo fscahe.\"}],\"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}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17\",\"versionEndExcluding\":\"6.6.51\",\"matchCriteriaId\":\"5BD10CE1-D3EC-4C1C-936E-F3C144999C4C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.10\",\"matchCriteriaId\":\"ACDEE48C-137A-4731-90D0-A675865E1BED\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"8B3CE743-2126-47A3-8B7C-822B502CF119\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4DEB27E7-30AA-45CC-8934-B89263EF3551\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"E0005AEF-856E-47EB-BFE4-90C46899394D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"39889A68-6D34-47A6-82FC-CD0BF23D6754\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8383ABF-1457-401F-9B61-EE50F4C61F4F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"B77A9280-37E6-49AD-B559-5B23A3B1DC3D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0a11262549ac2ac6fb98c7cd40a67136817e5a52\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/72a6e22c604c95ddb3b10b5d3bb85b6ff4dbc34f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e0d724932ad12e3528f4ce97fc0f6078d0cce4bc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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