CVE-2022-50342 (GCVE-0-2022-50342)

Vulnerability from cvelistv5 – Published: 2025-09-16 16:11 – Updated: 2026-01-14 18:22
VLAI?
Title
floppy: Fix memory leak in do_floppy_init()
Summary
In the Linux kernel, the following vulnerability has been resolved: floppy: Fix memory leak in do_floppy_init() A memory leak was reported when floppy_alloc_disk() failed in do_floppy_init(). unreferenced object 0xffff888115ed25a0 (size 8): comm "modprobe", pid 727, jiffies 4295051278 (age 25.529s) hex dump (first 8 bytes): 00 ac 67 5b 81 88 ff ff ..g[.... backtrace: [<000000007f457abb>] __kmalloc_node+0x4c/0xc0 [<00000000a87bfa9e>] blk_mq_realloc_tag_set_tags.part.0+0x6f/0x180 [<000000006f02e8b1>] blk_mq_alloc_tag_set+0x573/0x1130 [<0000000066007fd7>] 0xffffffffc06b8b08 [<0000000081f5ac40>] do_one_initcall+0xd0/0x4f0 [<00000000e26d04ee>] do_init_module+0x1a4/0x680 [<000000001bb22407>] load_module+0x6249/0x7110 [<00000000ad31ac4d>] __do_sys_finit_module+0x140/0x200 [<000000007bddca46>] do_syscall_64+0x35/0x80 [<00000000b5afec39>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 unreferenced object 0xffff88810fc30540 (size 32): comm "modprobe", pid 727, jiffies 4295051278 (age 25.529s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000007f457abb>] __kmalloc_node+0x4c/0xc0 [<000000006b91eab4>] blk_mq_alloc_tag_set+0x393/0x1130 [<0000000066007fd7>] 0xffffffffc06b8b08 [<0000000081f5ac40>] do_one_initcall+0xd0/0x4f0 [<00000000e26d04ee>] do_init_module+0x1a4/0x680 [<000000001bb22407>] load_module+0x6249/0x7110 [<00000000ad31ac4d>] __do_sys_finit_module+0x140/0x200 [<000000007bddca46>] do_syscall_64+0x35/0x80 [<00000000b5afec39>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 If the floppy_alloc_disk() failed, disks of current drive will not be set, thus the lastest allocated set->tag cannot be freed in the error handling path. A simple call graph shown as below: floppy_module_init() floppy_init() do_floppy_init() for (drive = 0; drive < N_DRIVE; drive++) blk_mq_alloc_tag_set() blk_mq_alloc_tag_set_tags() blk_mq_realloc_tag_set_tags() # set->tag allocated floppy_alloc_disk() blk_mq_alloc_disk() # error occurred, disks failed to allocated ->out_put_disk: for (drive = 0; drive < N_DRIVE; drive++) if (!disks[drive][0]) # the last disks is not set and loop break break; blk_mq_free_tag_set() # the latest allocated set->tag leaked Fix this problem by free the set->tag of current drive before jump to error handling path. [efremov: added stable list, changed title]
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 302cfee150291c6cd85b1ca197d062d0b423d09c , < f36d8c8651506aea5f09899f5356ece5d1384f50 (git)
Affected: 302cfee150291c6cd85b1ca197d062d0b423d09c , < 75d8c8851a4da0190c2480e84315b5fd3d0356c5 (git)
Affected: 302cfee150291c6cd85b1ca197d062d0b423d09c , < 55b3c66a0d441cd37154ae95e44d0b82ccfd580e (git)
Affected: 302cfee150291c6cd85b1ca197d062d0b423d09c , < f8ace2e304c5dd8a7328db9cd2b8a4b1b98d83ec (git)
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    Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.15.86 , ≤ 5.15.* (semver)
Unaffected: 6.0.16 , ≤ 6.0.* (semver)
Unaffected: 6.1.2 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfloppy: Fix memory leak in do_floppy_init()\n\nA memory leak was reported when floppy_alloc_disk() failed in\ndo_floppy_init().\n\nunreferenced object 0xffff888115ed25a0 (size 8):\n  comm \"modprobe\", pid 727, jiffies 4295051278 (age 25.529s)\n  hex dump (first 8 bytes):\n    00 ac 67 5b 81 88 ff ff                          ..g[....\n  backtrace:\n    [\u003c000000007f457abb\u003e] __kmalloc_node+0x4c/0xc0\n    [\u003c00000000a87bfa9e\u003e] blk_mq_realloc_tag_set_tags.part.0+0x6f/0x180\n    [\u003c000000006f02e8b1\u003e] blk_mq_alloc_tag_set+0x573/0x1130\n    [\u003c0000000066007fd7\u003e] 0xffffffffc06b8b08\n    [\u003c0000000081f5ac40\u003e] do_one_initcall+0xd0/0x4f0\n    [\u003c00000000e26d04ee\u003e] do_init_module+0x1a4/0x680\n    [\u003c000000001bb22407\u003e] load_module+0x6249/0x7110\n    [\u003c00000000ad31ac4d\u003e] __do_sys_finit_module+0x140/0x200\n    [\u003c000000007bddca46\u003e] do_syscall_64+0x35/0x80\n    [\u003c00000000b5afec39\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\nunreferenced object 0xffff88810fc30540 (size 32):\n  comm \"modprobe\", pid 727, jiffies 4295051278 (age 25.529s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [\u003c000000007f457abb\u003e] __kmalloc_node+0x4c/0xc0\n    [\u003c000000006b91eab4\u003e] blk_mq_alloc_tag_set+0x393/0x1130\n    [\u003c0000000066007fd7\u003e] 0xffffffffc06b8b08\n    [\u003c0000000081f5ac40\u003e] do_one_initcall+0xd0/0x4f0\n    [\u003c00000000e26d04ee\u003e] do_init_module+0x1a4/0x680\n    [\u003c000000001bb22407\u003e] load_module+0x6249/0x7110\n    [\u003c00000000ad31ac4d\u003e] __do_sys_finit_module+0x140/0x200\n    [\u003c000000007bddca46\u003e] do_syscall_64+0x35/0x80\n    [\u003c00000000b5afec39\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nIf the floppy_alloc_disk() failed, disks of current drive will not be set,\nthus the lastest allocated set-\u003etag cannot be freed in the error handling\npath. A simple call graph shown as below:\n\n floppy_module_init()\n   floppy_init()\n     do_floppy_init()\n       for (drive = 0; drive \u003c N_DRIVE; drive++)\n         blk_mq_alloc_tag_set()\n           blk_mq_alloc_tag_set_tags()\n             blk_mq_realloc_tag_set_tags() # set-\u003etag allocated\n         floppy_alloc_disk()\n           blk_mq_alloc_disk() # error occurred, disks failed to allocated\n\n       -\u003eout_put_disk:\n       for (drive = 0; drive \u003c N_DRIVE; drive++)\n         if (!disks[drive][0]) # the last disks is not set and loop break\n           break;\n         blk_mq_free_tag_set() # the latest allocated set-\u003etag leaked\n\nFix this problem by free the set-\u003etag of current drive before jump to\nerror handling path.\n\n[efremov: added stable list, changed title]"
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          "url": "https://git.kernel.org/stable/c/f8ace2e304c5dd8a7328db9cd2b8a4b1b98d83ec"
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      "title": "floppy: Fix memory leak in do_floppy_init()",
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    "dateUpdated": "2026-01-14T18:22:57.872Z",
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\"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f36d8c8651506aea5f09899f5356ece5d1384f50\"}, {\"url\": \"https://git.kernel.org/stable/c/75d8c8851a4da0190c2480e84315b5fd3d0356c5\"}, {\"url\": \"https://git.kernel.org/stable/c/55b3c66a0d441cd37154ae95e44d0b82ccfd580e\"}, {\"url\": \"https://git.kernel.org/stable/c/f8ace2e304c5dd8a7328db9cd2b8a4b1b98d83ec\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfloppy: Fix memory leak in do_floppy_init()\\n\\nA memory leak was reported when floppy_alloc_disk() failed in\\ndo_floppy_init().\\n\\nunreferenced object 0xffff888115ed25a0 (size 8):\\n  comm \\\"modprobe\\\", pid 727, jiffies 4295051278 (age 25.529s)\\n  hex dump (first 8 bytes):\\n    00 ac 67 5b 81 88 ff ff                          ..g[....\\n  backtrace:\\n    [\u003c000000007f457abb\u003e] __kmalloc_node+0x4c/0xc0\\n    [\u003c00000000a87bfa9e\u003e] blk_mq_realloc_tag_set_tags.part.0+0x6f/0x180\\n    [\u003c000000006f02e8b1\u003e] blk_mq_alloc_tag_set+0x573/0x1130\\n    [\u003c0000000066007fd7\u003e] 0xffffffffc06b8b08\\n    [\u003c0000000081f5ac40\u003e] do_one_initcall+0xd0/0x4f0\\n    [\u003c00000000e26d04ee\u003e] do_init_module+0x1a4/0x680\\n    [\u003c000000001bb22407\u003e] load_module+0x6249/0x7110\\n    [\u003c00000000ad31ac4d\u003e] __do_sys_finit_module+0x140/0x200\\n    [\u003c000000007bddca46\u003e] do_syscall_64+0x35/0x80\\n    [\u003c00000000b5afec39\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\\nunreferenced object 0xffff88810fc30540 (size 32):\\n  comm \\\"modprobe\\\", pid 727, jiffies 4295051278 (age 25.529s)\\n  hex dump (first 32 bytes):\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\\n  backtrace:\\n    [\u003c000000007f457abb\u003e] __kmalloc_node+0x4c/0xc0\\n    [\u003c000000006b91eab4\u003e] blk_mq_alloc_tag_set+0x393/0x1130\\n    [\u003c0000000066007fd7\u003e] 0xffffffffc06b8b08\\n    [\u003c0000000081f5ac40\u003e] do_one_initcall+0xd0/0x4f0\\n    [\u003c00000000e26d04ee\u003e] do_init_module+0x1a4/0x680\\n    [\u003c000000001bb22407\u003e] load_module+0x6249/0x7110\\n    [\u003c00000000ad31ac4d\u003e] __do_sys_finit_module+0x140/0x200\\n    [\u003c000000007bddca46\u003e] do_syscall_64+0x35/0x80\\n    [\u003c00000000b5afec39\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\\n\\nIf the floppy_alloc_disk() failed, disks of current drive will not be set,\\nthus the lastest allocated set-\u003etag cannot be freed in the error handling\\npath. A simple call graph shown as below:\\n\\n floppy_module_init()\\n   floppy_init()\\n     do_floppy_init()\\n       for (drive = 0; drive \u003c N_DRIVE; drive++)\\n         blk_mq_alloc_tag_set()\\n           blk_mq_alloc_tag_set_tags()\\n             blk_mq_realloc_tag_set_tags() # set-\u003etag allocated\\n         floppy_alloc_disk()\\n           blk_mq_alloc_disk() # error occurred, disks failed to allocated\\n\\n       -\u003eout_put_disk:\\n       for (drive = 0; drive \u003c N_DRIVE; drive++)\\n         if (!disks[drive][0]) # the last disks is not set and loop break\\n           break;\\n         blk_mq_free_tag_set() # the latest allocated set-\u003etag leaked\\n\\nFix this problem by free the set-\u003etag of current drive before jump to\\nerror handling path.\\n\\n[efremov: added stable list, changed title]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.86\", \"versionStartIncluding\": \"5.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.16\", \"versionStartIncluding\": \"5.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.2\", \"versionStartIncluding\": \"5.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.2\", \"versionStartIncluding\": \"5.11\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-09-16T16:11:34.260Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-50342\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-14T18:22:57.872Z\", \"dateReserved\": \"2025-09-16T16:03:27.881Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-16T16:11:21.665Z\", \"assignerShortName\": \"Linux\"}",
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}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.