cve-2024-49883
Vulnerability from cvelistv5
Published
2024-10-21 18:01
Modified
2024-12-19 09:28
Severity ?
EPSS score ?
0.02% (0.03466)
Summary
In the Linux kernel, the following vulnerability has been resolved: ext4: aovid use-after-free in ext4_ext_insert_extent() As Ojaswin mentioned in Link, in ext4_ext_insert_extent(), if the path is reallocated in ext4_ext_create_new_leaf(), we'll use the stale path and cause UAF. Below is a sample trace with dummy values: ext4_ext_insert_extent path = *ppath = 2000 ext4_ext_create_new_leaf(ppath) ext4_find_extent(ppath) path = *ppath = 2000 if (depth > path[0].p_maxdepth) kfree(path = 2000); *ppath = path = NULL; path = kcalloc() = 3000 *ppath = 3000; return path; /* here path is still 2000, UAF! */ eh = path[depth].p_hdr ================================================================== BUG: KASAN: slab-use-after-free in ext4_ext_insert_extent+0x26d4/0x3330 Read of size 8 at addr ffff8881027bf7d0 by task kworker/u36:1/179 CPU: 3 UID: 0 PID: 179 Comm: kworker/u6:1 Not tainted 6.11.0-rc2-dirty #866 Call Trace: <TASK> ext4_ext_insert_extent+0x26d4/0x3330 ext4_ext_map_blocks+0xe22/0x2d40 ext4_map_blocks+0x71e/0x1700 ext4_do_writepages+0x1290/0x2800 [...] Allocated by task 179: ext4_find_extent+0x81c/0x1f70 ext4_ext_map_blocks+0x146/0x2d40 ext4_map_blocks+0x71e/0x1700 ext4_do_writepages+0x1290/0x2800 ext4_writepages+0x26d/0x4e0 do_writepages+0x175/0x700 [...] Freed by task 179: kfree+0xcb/0x240 ext4_find_extent+0x7c0/0x1f70 ext4_ext_insert_extent+0xa26/0x3330 ext4_ext_map_blocks+0xe22/0x2d40 ext4_map_blocks+0x71e/0x1700 ext4_do_writepages+0x1290/0x2800 ext4_writepages+0x26d/0x4e0 do_writepages+0x175/0x700 [...] ================================================================== So use *ppath to update the path to avoid the above problem.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/51db04892a993cace63415be99848970a0f15ef2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5e811066c5ab709b070659197dccfb80ab650dddPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8162ee5d94b8c0351be0a9321be134872a7654a1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/975ca06f3fd154c5f7742083e7b2574c57d1c0c3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9df59009dfc6d9fc1bd9ddf6c5ab6e56d6ed887aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a164f3a432aae62ca23d03e6d926b122ee5b860dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/beb7b66fb489041c50c6473100b383f7a51648fcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bfed082ce4b1ce6349b05c09a0fa4f3da35ecb1bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e17ebe4fdd7665c93ae9459ba40fcdfb76769ac1
Impacted products
Vendor Product Version
Linux Linux Version: 10809df84a4d868db61af621bae3658494165279
Version: 10809df84a4d868db61af621bae3658494165279
Version: 10809df84a4d868db61af621bae3658494165279
Version: 10809df84a4d868db61af621bae3658494165279
Version: 10809df84a4d868db61af621bae3658494165279
Version: 10809df84a4d868db61af621bae3658494165279
Version: 10809df84a4d868db61af621bae3658494165279
Version: 10809df84a4d868db61af621bae3658494165279
Version: 10809df84a4d868db61af621bae3658494165279
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{
   containers: {
      adp: [
         {
            metrics: [
               {
                  other: {
                     content: {
                        id: "CVE-2024-49883",
                        options: [
                           {
                              Exploitation: "none",
                           },
                           {
                              Automatable: "no",
                           },
                           {
                              "Technical Impact": "partial",
                           },
                        ],
                        role: "CISA Coordinator",
                        timestamp: "2024-10-22T13:45:23.101470Z",
                        version: "2.0.3",
                     },
                     type: "ssvc",
                  },
               },
            ],
            providerMetadata: {
               dateUpdated: "2024-10-22T13:48:50.259Z",
               orgId: "134c704f-9b21-4f2e-91b3-4a467353bcc0",
               shortName: "CISA-ADP",
            },
            title: "CISA ADP Vulnrichment",
         },
      ],
      cna: {
         affected: [
            {
               defaultStatus: "unaffected",
               product: "Linux",
               programFiles: [
                  "fs/ext4/extents.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     lessThan: "e17ebe4fdd7665c93ae9459ba40fcdfb76769ac1",
                     status: "affected",
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                     versionType: "git",
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                     lessThan: "975ca06f3fd154c5f7742083e7b2574c57d1c0c3",
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                     status: "affected",
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                     versionType: "git",
                  },
                  {
                     lessThan: "9df59009dfc6d9fc1bd9ddf6c5ab6e56d6ed887a",
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                     versionType: "git",
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                     status: "affected",
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                     versionType: "git",
                  },
                  {
                     lessThan: "beb7b66fb489041c50c6473100b383f7a51648fc",
                     status: "affected",
                     version: "10809df84a4d868db61af621bae3658494165279",
                     versionType: "git",
                  },
                  {
                     lessThan: "bfed082ce4b1ce6349b05c09a0fa4f3da35ecb1b",
                     status: "affected",
                     version: "10809df84a4d868db61af621bae3658494165279",
                     versionType: "git",
                  },
                  {
                     lessThan: "a164f3a432aae62ca23d03e6d926b122ee5b860d",
                     status: "affected",
                     version: "10809df84a4d868db61af621bae3658494165279",
                     versionType: "git",
                  },
               ],
            },
            {
               defaultStatus: "affected",
               product: "Linux",
               programFiles: [
                  "fs/ext4/extents.c",
               ],
               repo: "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
               vendor: "Linux",
               versions: [
                  {
                     status: "affected",
                     version: "3.18",
                  },
                  {
                     lessThan: "3.18",
                     status: "unaffected",
                     version: "0",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "4.19.*",
                     status: "unaffected",
                     version: "4.19.323",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "5.4.*",
                     status: "unaffected",
                     version: "5.4.285",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "5.10.*",
                     status: "unaffected",
                     version: "5.10.227",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "5.15.*",
                     status: "unaffected",
                     version: "5.15.168",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.1.*",
                     status: "unaffected",
                     version: "6.1.113",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.6.*",
                     status: "unaffected",
                     version: "6.6.55",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.10.*",
                     status: "unaffected",
                     version: "6.10.14",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "6.11.*",
                     status: "unaffected",
                     version: "6.11.3",
                     versionType: "semver",
                  },
                  {
                     lessThanOrEqual: "*",
                     status: "unaffected",
                     version: "6.12",
                     versionType: "original_commit_for_fix",
                  },
               ],
            },
         ],
         descriptions: [
            {
               lang: "en",
               value: "In the Linux kernel, the following vulnerability has been resolved:\n\next4: aovid use-after-free in ext4_ext_insert_extent()\n\nAs Ojaswin mentioned in Link, in ext4_ext_insert_extent(), if the path is\nreallocated in ext4_ext_create_new_leaf(), we'll use the stale path and\ncause UAF. Below is a sample trace with dummy values:\n\next4_ext_insert_extent\n  path = *ppath = 2000\n  ext4_ext_create_new_leaf(ppath)\n    ext4_find_extent(ppath)\n      path = *ppath = 2000\n      if (depth > path[0].p_maxdepth)\n            kfree(path = 2000);\n            *ppath = path = NULL;\n      path = kcalloc() = 3000\n      *ppath = 3000;\n      return path;\n  /* here path is still 2000, UAF! */\n  eh = path[depth].p_hdr\n\n==================================================================\nBUG: KASAN: slab-use-after-free in ext4_ext_insert_extent+0x26d4/0x3330\nRead of size 8 at addr ffff8881027bf7d0 by task kworker/u36:1/179\nCPU: 3 UID: 0 PID: 179 Comm: kworker/u6:1 Not tainted 6.11.0-rc2-dirty #866\nCall Trace:\n <TASK>\n ext4_ext_insert_extent+0x26d4/0x3330\n ext4_ext_map_blocks+0xe22/0x2d40\n ext4_map_blocks+0x71e/0x1700\n ext4_do_writepages+0x1290/0x2800\n[...]\n\nAllocated by task 179:\n ext4_find_extent+0x81c/0x1f70\n ext4_ext_map_blocks+0x146/0x2d40\n ext4_map_blocks+0x71e/0x1700\n ext4_do_writepages+0x1290/0x2800\n ext4_writepages+0x26d/0x4e0\n do_writepages+0x175/0x700\n[...]\n\nFreed by task 179:\n kfree+0xcb/0x240\n ext4_find_extent+0x7c0/0x1f70\n ext4_ext_insert_extent+0xa26/0x3330\n ext4_ext_map_blocks+0xe22/0x2d40\n ext4_map_blocks+0x71e/0x1700\n ext4_do_writepages+0x1290/0x2800\n ext4_writepages+0x26d/0x4e0\n do_writepages+0x175/0x700\n[...]\n==================================================================\n\nSo use *ppath to update the path to avoid the above problem.",
            },
         ],
         providerMetadata: {
            dateUpdated: "2024-12-19T09:28:18.942Z",
            orgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            shortName: "Linux",
         },
         references: [
            {
               url: "https://git.kernel.org/stable/c/e17ebe4fdd7665c93ae9459ba40fcdfb76769ac1",
            },
            {
               url: "https://git.kernel.org/stable/c/975ca06f3fd154c5f7742083e7b2574c57d1c0c3",
            },
            {
               url: "https://git.kernel.org/stable/c/5e811066c5ab709b070659197dccfb80ab650ddd",
            },
            {
               url: "https://git.kernel.org/stable/c/9df59009dfc6d9fc1bd9ddf6c5ab6e56d6ed887a",
            },
            {
               url: "https://git.kernel.org/stable/c/51db04892a993cace63415be99848970a0f15ef2",
            },
            {
               url: "https://git.kernel.org/stable/c/8162ee5d94b8c0351be0a9321be134872a7654a1",
            },
            {
               url: "https://git.kernel.org/stable/c/beb7b66fb489041c50c6473100b383f7a51648fc",
            },
            {
               url: "https://git.kernel.org/stable/c/bfed082ce4b1ce6349b05c09a0fa4f3da35ecb1b",
            },
            {
               url: "https://git.kernel.org/stable/c/a164f3a432aae62ca23d03e6d926b122ee5b860d",
            },
         ],
         title: "ext4: aovid use-after-free in ext4_ext_insert_extent()",
         x_generator: {
            engine: "bippy-5f407fcff5a0",
         },
      },
   },
   cveMetadata: {
      assignerOrgId: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      assignerShortName: "Linux",
      cveId: "CVE-2024-49883",
      datePublished: "2024-10-21T18:01:20.827Z",
      dateReserved: "2024-10-21T12:17:06.021Z",
      dateUpdated: "2024-12-19T09:28:18.942Z",
      state: "PUBLISHED",
   },
   dataType: "CVE_RECORD",
   dataVersion: "5.1",
   "vulnerability-lookup:meta": {
      nvd: "{\"cve\":{\"id\":\"CVE-2024-49883\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-10-21T18:15:11.060\",\"lastModified\":\"2024-11-08T16:15:30.293\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: aovid use-after-free in ext4_ext_insert_extent()\\n\\nAs Ojaswin mentioned in Link, in ext4_ext_insert_extent(), if the path is\\nreallocated in ext4_ext_create_new_leaf(), we'll use the stale path and\\ncause UAF. Below is a sample trace with dummy values:\\n\\next4_ext_insert_extent\\n  path = *ppath = 2000\\n  ext4_ext_create_new_leaf(ppath)\\n    ext4_find_extent(ppath)\\n      path = *ppath = 2000\\n      if (depth > path[0].p_maxdepth)\\n            kfree(path = 2000);\\n            *ppath = path = NULL;\\n      path = kcalloc() = 3000\\n      *ppath = 3000;\\n      return path;\\n  /* here path is still 2000, UAF! */\\n  eh = path[depth].p_hdr\\n\\n==================================================================\\nBUG: KASAN: slab-use-after-free in ext4_ext_insert_extent+0x26d4/0x3330\\nRead of size 8 at addr ffff8881027bf7d0 by task kworker/u36:1/179\\nCPU: 3 UID: 0 PID: 179 Comm: kworker/u6:1 Not tainted 6.11.0-rc2-dirty #866\\nCall Trace:\\n <TASK>\\n ext4_ext_insert_extent+0x26d4/0x3330\\n ext4_ext_map_blocks+0xe22/0x2d40\\n ext4_map_blocks+0x71e/0x1700\\n ext4_do_writepages+0x1290/0x2800\\n[...]\\n\\nAllocated by task 179:\\n ext4_find_extent+0x81c/0x1f70\\n ext4_ext_map_blocks+0x146/0x2d40\\n ext4_map_blocks+0x71e/0x1700\\n ext4_do_writepages+0x1290/0x2800\\n ext4_writepages+0x26d/0x4e0\\n do_writepages+0x175/0x700\\n[...]\\n\\nFreed by task 179:\\n kfree+0xcb/0x240\\n ext4_find_extent+0x7c0/0x1f70\\n ext4_ext_insert_extent+0xa26/0x3330\\n ext4_ext_map_blocks+0xe22/0x2d40\\n ext4_map_blocks+0x71e/0x1700\\n ext4_do_writepages+0x1290/0x2800\\n ext4_writepages+0x26d/0x4e0\\n do_writepages+0x175/0x700\\n[...]\\n==================================================================\\n\\nSo use *ppath to update the path to avoid the above problem.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: evitar use-after-free en ext4_ext_insert_extent() Como mencionó Ojaswin en Link, en ext4_ext_insert_extent(), si la ruta se reasigna en ext4_ext_create_new_leaf(), usaremos la ruta obsoleta y causaremos UAF. A continuación, se muestra un seguimiento de muestra con valores ficticios: ext4_ext_insert_extent path = *ppath = 2000 ext4_ext_create_new_leaf(ppath) ext4_find_extent(ppath) path = *ppath = 2000 if (depth &gt; path[0].p_maxdepth) kfree(path = 2000); *ppath = path = NULL; path = kcalloc() = 3000 *ppath = 3000; return path; /* aquí la ruta sigue siendo 2000, UAF! */ eh = path[depth].p_hdr ===================================================================== ERROR: KASAN: slab-use-after-free en ext4_ext_insert_extent+0x26d4/0x3330 Lectura de tamaño 8 en la dirección ffff8881027bf7d0 por la tarea kworker/u36:1/179 CPU: 3 UID: 0 PID: 179 Comm: kworker/u6:1 No contaminado 6.11.0-rc2-dirty #866 Seguimiento de llamadas:  ext4_ext_insert_extent+0x26d4/0x3330 ext4_ext_map_blocks+0xe22/0x2d40 ext4_map_blocks+0x71e/0x1700 ext4_do_writepages+0x1290/0x2800 [...] Asignado por la tarea 179: ext4_find_extent+0x81c/0x1f70 ext4_ext_map_blocks+0x146/0x2d40 ext4_map_blocks+0x71e/0x1700 ext4_do_writepages+0x1290/0x2800 ext4_writepages+0x26d/0x4e0 do_writepages+0x175/0x700 [...] Liberado por la tarea 179: kfree+0xcb/0x240 ext4_find_extent+0x7c0/0x1f70 ext4_ext_insert_extent+0xa26/0x3330 ext4_ext_map_blocks+0xe22/0x2d40 ext4_map_blocks+0x71e/0x1700 ext4_do_writepages+0x1290/0x2800 ext4_writepages+0x26d/0x4e0 do_writepages+0x175/0x700 [...]==================================================================  Así que use *ppath para actualizar el path para evitar el problema de arriba\"}],\"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\":\"3.18\",\"versionEndExcluding\":\"5.10.227\",\"matchCriteriaId\":\"5C882E98-F19D-47B6-A807-73BB9ABA763C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.168\",\"matchCriteriaId\":\"4D51C05D-455B-4D8D-89E7-A58E140B864C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.113\",\"matchCriteriaId\":\"D01BD22E-ACD1-4618-9D01-6116570BE1EE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.55\",\"matchCriteriaId\":\"E90B9576-56C4-47BC-AAB0-C5B2D438F5D0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.14\",\"matchCriteriaId\":\"4C16BCE0-FFA0-4599-BE0A-1FD65101C021\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.11\",\"versionEndExcluding\":\"6.11.3\",\"matchCriteriaId\":\"54D9C704-D679-41A7-9C40-10A6B1E7FFE9\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/51db04892a993cace63415be99848970a0f15ef2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/5e811066c5ab709b070659197dccfb80ab650ddd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8162ee5d94b8c0351be0a9321be134872a7654a1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/975ca06f3fd154c5f7742083e7b2574c57d1c0c3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9df59009dfc6d9fc1bd9ddf6c5ab6e56d6ed887a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a164f3a432aae62ca23d03e6d926b122ee5b860d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/beb7b66fb489041c50c6473100b383f7a51648fc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/bfed082ce4b1ce6349b05c09a0fa4f3da35ecb1b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e17ebe4fdd7665c93ae9459ba40fcdfb76769ac1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
      vulnrichment: {
         containers: "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-49883\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-22T13:45:23.101470Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-22T13:45:26.221Z\"}}], \"cna\": {\"title\": \"ext4: aovid use-after-free in ext4_ext_insert_extent()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"10809df84a4d868db61af621bae3658494165279\", \"lessThan\": \"e17ebe4fdd7665c93ae9459ba40fcdfb76769ac1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"10809df84a4d868db61af621bae3658494165279\", \"lessThan\": \"975ca06f3fd154c5f7742083e7b2574c57d1c0c3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"10809df84a4d868db61af621bae3658494165279\", \"lessThan\": \"5e811066c5ab709b070659197dccfb80ab650ddd\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"10809df84a4d868db61af621bae3658494165279\", \"lessThan\": \"9df59009dfc6d9fc1bd9ddf6c5ab6e56d6ed887a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"10809df84a4d868db61af621bae3658494165279\", \"lessThan\": \"51db04892a993cace63415be99848970a0f15ef2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"10809df84a4d868db61af621bae3658494165279\", \"lessThan\": \"8162ee5d94b8c0351be0a9321be134872a7654a1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"10809df84a4d868db61af621bae3658494165279\", \"lessThan\": \"beb7b66fb489041c50c6473100b383f7a51648fc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"10809df84a4d868db61af621bae3658494165279\", \"lessThan\": \"bfed082ce4b1ce6349b05c09a0fa4f3da35ecb1b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"10809df84a4d868db61af621bae3658494165279\", \"lessThan\": \"a164f3a432aae62ca23d03e6d926b122ee5b860d\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/ext4/extents.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.18\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.18\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.323\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.285\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.227\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.168\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.113\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.55\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.14\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/ext4/extents.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/e17ebe4fdd7665c93ae9459ba40fcdfb76769ac1\"}, {\"url\": \"https://git.kernel.org/stable/c/975ca06f3fd154c5f7742083e7b2574c57d1c0c3\"}, {\"url\": \"https://git.kernel.org/stable/c/5e811066c5ab709b070659197dccfb80ab650ddd\"}, {\"url\": \"https://git.kernel.org/stable/c/9df59009dfc6d9fc1bd9ddf6c5ab6e56d6ed887a\"}, {\"url\": \"https://git.kernel.org/stable/c/51db04892a993cace63415be99848970a0f15ef2\"}, {\"url\": \"https://git.kernel.org/stable/c/8162ee5d94b8c0351be0a9321be134872a7654a1\"}, {\"url\": \"https://git.kernel.org/stable/c/beb7b66fb489041c50c6473100b383f7a51648fc\"}, {\"url\": \"https://git.kernel.org/stable/c/bfed082ce4b1ce6349b05c09a0fa4f3da35ecb1b\"}, {\"url\": \"https://git.kernel.org/stable/c/a164f3a432aae62ca23d03e6d926b122ee5b860d\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: aovid use-after-free in ext4_ext_insert_extent()\\n\\nAs Ojaswin mentioned in Link, in ext4_ext_insert_extent(), if the path is\\nreallocated in ext4_ext_create_new_leaf(), we'll use the stale path and\\ncause UAF. Below is a sample trace with dummy values:\\n\\next4_ext_insert_extent\\n  path = *ppath = 2000\\n  ext4_ext_create_new_leaf(ppath)\\n    ext4_find_extent(ppath)\\n      path = *ppath = 2000\\n      if (depth > path[0].p_maxdepth)\\n            kfree(path = 2000);\\n            *ppath = path = NULL;\\n      path = kcalloc() = 3000\\n      *ppath = 3000;\\n      return path;\\n  /* here path is still 2000, UAF! */\\n  eh = path[depth].p_hdr\\n\\n==================================================================\\nBUG: KASAN: slab-use-after-free in ext4_ext_insert_extent+0x26d4/0x3330\\nRead of size 8 at addr ffff8881027bf7d0 by task kworker/u36:1/179\\nCPU: 3 UID: 0 PID: 179 Comm: kworker/u6:1 Not tainted 6.11.0-rc2-dirty #866\\nCall Trace:\\n <TASK>\\n ext4_ext_insert_extent+0x26d4/0x3330\\n ext4_ext_map_blocks+0xe22/0x2d40\\n ext4_map_blocks+0x71e/0x1700\\n ext4_do_writepages+0x1290/0x2800\\n[...]\\n\\nAllocated by task 179:\\n ext4_find_extent+0x81c/0x1f70\\n ext4_ext_map_blocks+0x146/0x2d40\\n ext4_map_blocks+0x71e/0x1700\\n ext4_do_writepages+0x1290/0x2800\\n ext4_writepages+0x26d/0x4e0\\n do_writepages+0x175/0x700\\n[...]\\n\\nFreed by task 179:\\n kfree+0xcb/0x240\\n ext4_find_extent+0x7c0/0x1f70\\n ext4_ext_insert_extent+0xa26/0x3330\\n ext4_ext_map_blocks+0xe22/0x2d40\\n ext4_map_blocks+0x71e/0x1700\\n ext4_do_writepages+0x1290/0x2800\\n ext4_writepages+0x26d/0x4e0\\n do_writepages+0x175/0x700\\n[...]\\n==================================================================\\n\\nSo use *ppath to update the path to avoid the above problem.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T09:28:18.942Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2024-49883\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T09:28:18.942Z\", \"dateReserved\": \"2024-10-21T12:17:06.021Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T18:01:20.827Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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