CVE-2022-49560 (GCVE-0-2022-49560)
Vulnerability from cvelistv5
Published
2025-02-26 02:14
Modified
2025-10-01 19:46
Severity ?
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: exfat: check if cluster num is valid Syzbot reported slab-out-of-bounds read in exfat_clear_bitmap. This was triggered by reproducer calling truncute with size 0, which causes the following trace: BUG: KASAN: slab-out-of-bounds in exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174 Read of size 8 at addr ffff888115aa9508 by task syz-executor251/365 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3c0 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report+0x1a4/0x1f0 mm/kasan/report.c:436 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174 exfat_free_cluster+0x25a/0x4a0 fs/exfat/fatent.c:181 __exfat_truncate+0x99e/0xe00 fs/exfat/file.c:217 exfat_truncate+0x11b/0x4f0 fs/exfat/file.c:243 exfat_setattr+0xa03/0xd40 fs/exfat/file.c:339 notify_change+0xb76/0xe10 fs/attr.c:336 do_truncate+0x1ea/0x2d0 fs/open.c:65 Move the is_valid_cluster() helper from fatent.c to a common header to make it reusable in other *.c files. And add is_valid_cluster() to validate if cluster number is within valid range in exfat_clear_bitmap() and exfat_set_bitmap().
References
Impacted products
Vendor Product Version
Linux Linux Version: 1e49a94cf707204b66a3fb242f2814712c941f52
Version: 1e49a94cf707204b66a3fb242f2814712c941f52
Version: 1e49a94cf707204b66a3fb242f2814712c941f52
Version: 1e49a94cf707204b66a3fb242f2814712c941f52
Version: 1e49a94cf707204b66a3fb242f2814712c941f52
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And add is_valid_cluster()\\nto validate if cluster number is within valid range in exfat_clear_bitmap()\\nand exfat_set_bitmap().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: exfat: comprobar si el n\u00famero de cl\u00faster es v\u00e1lido Syzbot inform\u00f3 una lectura de slab fuera de los l\u00edmites en exfat_clear_bitmap. Esto fue provocado por el reproductor que llama a truncute con tama\u00f1o 0, lo que provoca el siguiente seguimiento: ERROR: KASAN: slab-out-of-bounds in exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174 Read of size 8 at addr ffff888115aa9508 by task syz-executor251/365 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3c0 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report+0x1a4/0x1f0 mm/kasan/report.c:436 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174 exfat_free_cluster+0x25a/0x4a0 fs/exfat/fatent.c:181 __exfat_truncate+0x99e/0xe00 fs/exfat/file.c:217 exfat_truncate+0x11b/0x4f0 fs/exfat/file.c:243 exfat_setattr+0xa03/0xd40 fs/exfat/file.c:339 notify_change+0xb76/0xe10 fs/attr.c:336 do_truncate+0x1ea/0x2d0 fs/open.c:65 Move the is_valid_cluster() helper from fatent.c to a common header to make it reusable in other *.c files. 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\"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T16:50:01.269Z\"}}], \"cna\": {\"title\": \"exfat: check if cluster num is valid\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"1e49a94cf707204b66a3fb242f2814712c941f52\", \"lessThan\": \"82f723b8a5adf497f9e34c702a30ca7298615654\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1e49a94cf707204b66a3fb242f2814712c941f52\", \"lessThan\": \"c504167adc3248095a905fa0700a9693897cb5ed\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1e49a94cf707204b66a3fb242f2814712c941f52\", \"lessThan\": \"7c58b14b6f9cde9f69e7fa053ab73f6e013a7131\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1e49a94cf707204b66a3fb242f2814712c941f52\", \"lessThan\": \"2193286402df2d9c53294f7a858d5e6fd7346e08\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1e49a94cf707204b66a3fb242f2814712c941f52\", \"lessThan\": \"64ba4b15e5c045f8b746c6da5fc9be9a6b00b61d\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/exfat/balloc.c\", \"fs/exfat/exfat_fs.h\", \"fs/exfat/fatent.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.7\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.7\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.120\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.45\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.17.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.17.*\"}, {\"status\": \"unaffected\", \"version\": \"5.18.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.18.*\"}, {\"status\": \"unaffected\", \"version\": \"5.19\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/exfat/balloc.c\", \"fs/exfat/exfat_fs.h\", \"fs/exfat/fatent.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/82f723b8a5adf497f9e34c702a30ca7298615654\"}, {\"url\": \"https://git.kernel.org/stable/c/c504167adc3248095a905fa0700a9693897cb5ed\"}, {\"url\": \"https://git.kernel.org/stable/c/7c58b14b6f9cde9f69e7fa053ab73f6e013a7131\"}, {\"url\": \"https://git.kernel.org/stable/c/2193286402df2d9c53294f7a858d5e6fd7346e08\"}, {\"url\": \"https://git.kernel.org/stable/c/64ba4b15e5c045f8b746c6da5fc9be9a6b00b61d\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nexfat: check if cluster num is valid\\n\\nSyzbot reported slab-out-of-bounds read in exfat_clear_bitmap.\\nThis was triggered by reproducer calling truncute with size 0,\\nwhich causes the following trace:\\n\\nBUG: KASAN: slab-out-of-bounds in exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174\\nRead of size 8 at addr ffff888115aa9508 by task syz-executor251/365\\n\\nCall Trace:\\n __dump_stack lib/dump_stack.c:77 [inline]\\n dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118\\n print_address_description+0x81/0x3c0 mm/kasan/report.c:233\\n __kasan_report mm/kasan/report.c:419 [inline]\\n kasan_report+0x1a4/0x1f0 mm/kasan/report.c:436\\n __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309\\n exfat_clear_bitmap+0x147/0x490 fs/exfat/balloc.c:174\\n exfat_free_cluster+0x25a/0x4a0 fs/exfat/fatent.c:181\\n __exfat_truncate+0x99e/0xe00 fs/exfat/file.c:217\\n exfat_truncate+0x11b/0x4f0 fs/exfat/file.c:243\\n exfat_setattr+0xa03/0xd40 fs/exfat/file.c:339\\n notify_change+0xb76/0xe10 fs/attr.c:336\\n do_truncate+0x1ea/0x2d0 fs/open.c:65\\n\\nMove the is_valid_cluster() helper from fatent.c to a common\\nheader to make it reusable in other *.c files. And add is_valid_cluster()\\nto validate if cluster number is within valid range in exfat_clear_bitmap()\\nand exfat_set_bitmap().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.120\", \"versionStartIncluding\": \"5.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.45\", \"versionStartIncluding\": \"5.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17.13\", \"versionStartIncluding\": \"5.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.18.2\", \"versionStartIncluding\": \"5.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.19\", \"versionStartIncluding\": \"5.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:40:34.194Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49560\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T19:46:39.057Z\", \"dateReserved\": \"2025-02-26T02:08:31.591Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-02-26T02:14:05.548Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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