CVE-2024-26901 (GCVE-0-2024-26901)

Vulnerability from cvelistv5 – Published: 2024-04-17 10:27 – Updated: 2025-05-04 08:59
VLAI?
Title
do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak
Summary
In the Linux kernel, the following vulnerability has been resolved: do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak syzbot identified a kernel information leak vulnerability in do_sys_name_to_handle() and issued the following report [1]. [1] "BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x100 lib/usercopy.c:40 instrument_copy_to_user include/linux/instrumented.h:114 [inline] _copy_to_user+0xbc/0x100 lib/usercopy.c:40 copy_to_user include/linux/uaccess.h:191 [inline] do_sys_name_to_handle fs/fhandle.c:73 [inline] __do_sys_name_to_handle_at fs/fhandle.c:112 [inline] __se_sys_name_to_handle_at+0x949/0xb10 fs/fhandle.c:94 __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94 ... Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] do_sys_name_to_handle fs/fhandle.c:39 [inline] __do_sys_name_to_handle_at fs/fhandle.c:112 [inline] __se_sys_name_to_handle_at+0x441/0xb10 fs/fhandle.c:94 __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94 ... Bytes 18-19 of 20 are uninitialized Memory access of size 20 starts at ffff888128a46380 Data copied to user address 0000000020000240" Per Chuck Lever's suggestion, use kzalloc() instead of kmalloc() to solve the problem.
Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 990d6c2d7aee921e3bce22b2d6a750fd552262be , < 4bac28f441e3cc9d3f1a84c8d023228a68d8a7c1 (git)
Affected: 990d6c2d7aee921e3bce22b2d6a750fd552262be , < 772a7def9868091da3bcb0d6c6ff9f0c03d7fa8b (git)
Affected: 990d6c2d7aee921e3bce22b2d6a750fd552262be , < cde76b3af247f615447bcfecf610bb76c3529126 (git)
Affected: 990d6c2d7aee921e3bce22b2d6a750fd552262be , < 423b6bdf19bbc5e1f7e7461045099917378f7e71 (git)
Affected: 990d6c2d7aee921e3bce22b2d6a750fd552262be , < e6450d5e46a737a008b4885aa223486113bf0ad6 (git)
Affected: 990d6c2d7aee921e3bce22b2d6a750fd552262be , < c1362eae861db28b1608b9dc23e49634fe87b63b (git)
Affected: 990d6c2d7aee921e3bce22b2d6a750fd552262be , < cba138f1ef37ec6f961baeab62f312dedc7cf730 (git)
Affected: 990d6c2d7aee921e3bce22b2d6a750fd552262be , < bf9ec1b24ab4e94345aa1c60811dd329f069c38b (git)
Affected: 990d6c2d7aee921e3bce22b2d6a750fd552262be , < 3948abaa4e2be938ccdfc289385a27342fb13d43 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.39
Unaffected: 0 , < 2.6.39 (semver)
Unaffected: 4.19.311 , ≤ 4.19.* (semver)
Unaffected: 5.4.273 , ≤ 5.4.* (semver)
Unaffected: 5.10.214 , ≤ 5.10.* (semver)
Unaffected: 5.15.153 , ≤ 5.15.* (semver)
Unaffected: 6.1.83 , ≤ 6.1.* (semver)
Unaffected: 6.6.23 , ≤ 6.6.* (semver)
Unaffected: 6.7.11 , ≤ 6.7.* (semver)
Unaffected: 6.8.2 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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_copy_to_user+0xbc/0x100 lib/usercopy.c:40\\n copy_to_user include/linux/uaccess.h:191 [inline]\\n do_sys_name_to_handle fs/fhandle.c:73 [inline]\\n __do_sys_name_to_handle_at fs/fhandle.c:112 [inline]\\n __se_sys_name_to_handle_at+0x949/0xb10 fs/fhandle.c:94\\n __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94\\n ...\\n\\nUninit was created at:\\n slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768\\n slab_alloc_node mm/slub.c:3478 [inline]\\n __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517\\n __do_kmalloc_node mm/slab_common.c:1006 [inline]\\n __kmalloc+0x121/0x3c0 mm/slab_common.c:1020\\n kmalloc include/linux/slab.h:604 [inline]\\n do_sys_name_to_handle fs/fhandle.c:39 [inline]\\n __do_sys_name_to_handle_at fs/fhandle.c:112 [inline]\\n __se_sys_name_to_handle_at+0x441/0xb10 fs/fhandle.c:94\\n __x64_sys_name_to_handle_at+0xe4/0x140 fs/fhandle.c:94\\n ...\\n\\nBytes 18-19 of 20 are uninitialized\\nMemory access of size 20 starts at ffff888128a46380\\nData copied to user address 0000000020000240\\\"\\n\\nPer Chuck Lever\u0027s suggestion, use kzalloc() instead of kmalloc() to\\nsolve the problem.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:17:54.209Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26901\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-07T19:03:33.420Z\", \"dateReserved\": \"2024-02-19T14:20:24.187Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-17T10:27:50.374Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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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.