CVE-2023-52434 (GCVE-0-2023-52434)

Vulnerability from cvelistv5 – Published: 2024-02-20 18:04 – Updated: 2026-01-05 10:16
VLAI?
Title
smb: client: fix potential OOBs in smb2_parse_contexts()
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential OOBs in smb2_parse_contexts() Validate offsets and lengths before dereferencing create contexts in smb2_parse_contexts(). This fixes following oops when accessing invalid create contexts from server: BUG: unable to handle page fault for address: ffff8881178d8cc3 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 4a01067 P4D 4a01067 PUD 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 3 PID: 1736 Comm: mount.cifs Not tainted 6.7.0-rc4 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014 RIP: 0010:smb2_parse_contexts+0xa0/0x3a0 [cifs] Code: f8 10 75 13 48 b8 93 ad 25 50 9c b4 11 e7 49 39 06 0f 84 d2 00 00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 <0f> b7 7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00 RSP: 0018:ffffc900007939e0 EFLAGS: 00010216 RAX: ffffc90000793c78 RBX: ffff8880180cc000 RCX: ffffc90000793c90 RDX: ffffc90000793cc0 RSI: ffff8880178d8cc0 RDI: ffff8880180cc000 RBP: ffff8881178d8cbf R08: ffffc90000793c22 R09: 0000000000000000 R10: ffff8880180cc000 R11: 0000000000000024 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000000 R15: ffffc90000793c22 FS: 00007f873753cbc0(0000) GS:ffff88806bc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8881178d8cc3 CR3: 00000000181ca000 CR4: 0000000000750ef0 PKRU: 55555554 Call Trace: <TASK> ? __die+0x23/0x70 ? page_fault_oops+0x181/0x480 ? search_module_extables+0x19/0x60 ? srso_alias_return_thunk+0x5/0xfbef5 ? exc_page_fault+0x1b6/0x1c0 ? asm_exc_page_fault+0x26/0x30 ? smb2_parse_contexts+0xa0/0x3a0 [cifs] SMB2_open+0x38d/0x5f0 [cifs] ? smb2_is_path_accessible+0x138/0x260 [cifs] smb2_is_path_accessible+0x138/0x260 [cifs] cifs_is_path_remote+0x8d/0x230 [cifs] cifs_mount+0x7e/0x350 [cifs] cifs_smb3_do_mount+0x128/0x780 [cifs] smb3_get_tree+0xd9/0x290 [cifs] vfs_get_tree+0x2c/0x100 ? capable+0x37/0x70 path_mount+0x2d7/0xb80 ? srso_alias_return_thunk+0x5/0xfbef5 ? _raw_spin_unlock_irqrestore+0x44/0x60 __x64_sys_mount+0x11a/0x150 do_syscall_64+0x47/0xf0 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f8737657b1e
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: b8c32dbb0deb287a5fcb78251e4eae6c7275760d , < 6726429c18c62dbf5e96ebbd522f262e016553fb (git)
Affected: b8c32dbb0deb287a5fcb78251e4eae6c7275760d , < 13fb0fc4917621f3dfa285a27eaf7151d770b5e5 (git)
Affected: b8c32dbb0deb287a5fcb78251e4eae6c7275760d , < 890bc4fac3c0973a49cac35f634579bebba7fe48 (git)
Affected: b8c32dbb0deb287a5fcb78251e4eae6c7275760d , < 1ae3c59355dc9882e09c020afe8ffbd895ad0f29 (git)
Affected: b8c32dbb0deb287a5fcb78251e4eae6c7275760d , < 17a0f64cc02d4972e21c733d9f21d1c512963afa (git)
Affected: b8c32dbb0deb287a5fcb78251e4eae6c7275760d , < af1689a9b7701d9907dfc84d2a4b57c4bc907144 (git)
Create a notification for this product.
    Linux Linux Affected: 3.7
Unaffected: 0 , < 3.7 (semver)
Unaffected: 5.4.277 , ≤ 5.4.* (semver)
Unaffected: 5.10.211 , ≤ 5.10.* (semver)
Unaffected: 5.15.150 , ≤ 5.15.* (semver)
Unaffected: 6.1.79 , ≤ 6.1.* (semver)
Unaffected: 6.6.8 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (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\nsmb: client: fix potential OOBs in smb2_parse_contexts()\n\nValidate offsets and lengths before dereferencing create contexts in\nsmb2_parse_contexts().\n\nThis fixes following oops when accessing invalid create contexts from\nserver:\n\n  BUG: unable to handle page fault for address: ffff8881178d8cc3\n  #PF: supervisor read access in kernel mode\n  #PF: error_code(0x0000) - not-present page\n  PGD 4a01067 P4D 4a01067 PUD 0\n  Oops: 0000 [#1] PREEMPT SMP NOPTI\n  CPU: 3 PID: 1736 Comm: mount.cifs Not tainted 6.7.0-rc4 #1\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\n  rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\n  RIP: 0010:smb2_parse_contexts+0xa0/0x3a0 [cifs]\n  Code: f8 10 75 13 48 b8 93 ad 25 50 9c b4 11 e7 49 39 06 0f 84 d2 00\n  00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 \u003c0f\u003e b7\n  7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00\n  RSP: 0018:ffffc900007939e0 EFLAGS: 00010216\n  RAX: ffffc90000793c78 RBX: ffff8880180cc000 RCX: ffffc90000793c90\n  RDX: ffffc90000793cc0 RSI: ffff8880178d8cc0 RDI: ffff8880180cc000\n  RBP: ffff8881178d8cbf R08: ffffc90000793c22 R09: 0000000000000000\n  R10: ffff8880180cc000 R11: 0000000000000024 R12: 0000000000000000\n  R13: 0000000000000020 R14: 0000000000000000 R15: ffffc90000793c22\n  FS: 00007f873753cbc0(0000) GS:ffff88806bc00000(0000)\n  knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: ffff8881178d8cc3 CR3: 00000000181ca000 CR4: 0000000000750ef0\n  PKRU: 55555554\n  Call Trace:\n   \u003cTASK\u003e\n   ? __die+0x23/0x70\n   ? page_fault_oops+0x181/0x480\n   ? search_module_extables+0x19/0x60\n   ? srso_alias_return_thunk+0x5/0xfbef5\n   ? exc_page_fault+0x1b6/0x1c0\n   ? asm_exc_page_fault+0x26/0x30\n   ? smb2_parse_contexts+0xa0/0x3a0 [cifs]\n   SMB2_open+0x38d/0x5f0 [cifs]\n   ? smb2_is_path_accessible+0x138/0x260 [cifs]\n   smb2_is_path_accessible+0x138/0x260 [cifs]\n   cifs_is_path_remote+0x8d/0x230 [cifs]\n   cifs_mount+0x7e/0x350 [cifs]\n   cifs_smb3_do_mount+0x128/0x780 [cifs]\n   smb3_get_tree+0xd9/0x290 [cifs]\n   vfs_get_tree+0x2c/0x100\n   ? capable+0x37/0x70\n   path_mount+0x2d7/0xb80\n   ? srso_alias_return_thunk+0x5/0xfbef5\n   ? _raw_spin_unlock_irqrestore+0x44/0x60\n   __x64_sys_mount+0x11a/0x150\n   do_syscall_64+0x47/0xf0\n   entry_SYSCALL_64_after_hwframe+0x6f/0x77\n  RIP: 0033:0x7f8737657b1e"
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\"6726429c18c62dbf5e96ebbd522f262e016553fb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b8c32dbb0deb287a5fcb78251e4eae6c7275760d\", \"lessThan\": \"13fb0fc4917621f3dfa285a27eaf7151d770b5e5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b8c32dbb0deb287a5fcb78251e4eae6c7275760d\", \"lessThan\": \"890bc4fac3c0973a49cac35f634579bebba7fe48\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b8c32dbb0deb287a5fcb78251e4eae6c7275760d\", \"lessThan\": \"1ae3c59355dc9882e09c020afe8ffbd895ad0f29\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b8c32dbb0deb287a5fcb78251e4eae6c7275760d\", \"lessThan\": \"17a0f64cc02d4972e21c733d9f21d1c512963afa\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"b8c32dbb0deb287a5fcb78251e4eae6c7275760d\", \"lessThan\": \"af1689a9b7701d9907dfc84d2a4b57c4bc907144\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/smb/client/cached_dir.c\", \"fs/smb/client/smb2pdu.c\", \"fs/smb/client/smb2proto.h\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.7\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.7\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.277\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.211\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.150\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.79\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/smb/client/cached_dir.c\", \"fs/smb/client/smb2pdu.c\", \"fs/smb/client/smb2proto.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/6726429c18c62dbf5e96ebbd522f262e016553fb\"}, {\"url\": \"https://git.kernel.org/stable/c/13fb0fc4917621f3dfa285a27eaf7151d770b5e5\"}, {\"url\": \"https://git.kernel.org/stable/c/890bc4fac3c0973a49cac35f634579bebba7fe48\"}, {\"url\": \"https://git.kernel.org/stable/c/1ae3c59355dc9882e09c020afe8ffbd895ad0f29\"}, {\"url\": \"https://git.kernel.org/stable/c/17a0f64cc02d4972e21c733d9f21d1c512963afa\"}, {\"url\": \"https://git.kernel.org/stable/c/af1689a9b7701d9907dfc84d2a4b57c4bc907144\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: client: fix potential OOBs in smb2_parse_contexts()\\n\\nValidate offsets and lengths before dereferencing create contexts in\\nsmb2_parse_contexts().\\n\\nThis fixes following oops when accessing invalid create contexts from\\nserver:\\n\\n  BUG: unable to handle page fault for address: ffff8881178d8cc3\\n  #PF: supervisor read access in kernel mode\\n  #PF: error_code(0x0000) - not-present page\\n  PGD 4a01067 P4D 4a01067 PUD 0\\n  Oops: 0000 [#1] PREEMPT SMP NOPTI\\n  CPU: 3 PID: 1736 Comm: mount.cifs Not tainted 6.7.0-rc4 #1\\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\\n  rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\\n  RIP: 0010:smb2_parse_contexts+0xa0/0x3a0 [cifs]\\n  Code: f8 10 75 13 48 b8 93 ad 25 50 9c b4 11 e7 49 39 06 0f 84 d2 00\\n  00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 \u003c0f\u003e b7\\n  7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00\\n  RSP: 0018:ffffc900007939e0 EFLAGS: 00010216\\n  RAX: ffffc90000793c78 RBX: ffff8880180cc000 RCX: ffffc90000793c90\\n  RDX: ffffc90000793cc0 RSI: ffff8880178d8cc0 RDI: ffff8880180cc000\\n  RBP: ffff8881178d8cbf R08: ffffc90000793c22 R09: 0000000000000000\\n  R10: ffff8880180cc000 R11: 0000000000000024 R12: 0000000000000000\\n  R13: 0000000000000020 R14: 0000000000000000 R15: ffffc90000793c22\\n  FS: 00007f873753cbc0(0000) GS:ffff88806bc00000(0000)\\n  knlGS:0000000000000000\\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n  CR2: ffff8881178d8cc3 CR3: 00000000181ca000 CR4: 0000000000750ef0\\n  PKRU: 55555554\\n  Call Trace:\\n   \u003cTASK\u003e\\n   ? __die+0x23/0x70\\n   ? page_fault_oops+0x181/0x480\\n   ? search_module_extables+0x19/0x60\\n   ? srso_alias_return_thunk+0x5/0xfbef5\\n   ? exc_page_fault+0x1b6/0x1c0\\n   ? asm_exc_page_fault+0x26/0x30\\n   ? smb2_parse_contexts+0xa0/0x3a0 [cifs]\\n   SMB2_open+0x38d/0x5f0 [cifs]\\n   ? smb2_is_path_accessible+0x138/0x260 [cifs]\\n   smb2_is_path_accessible+0x138/0x260 [cifs]\\n   cifs_is_path_remote+0x8d/0x230 [cifs]\\n   cifs_mount+0x7e/0x350 [cifs]\\n   cifs_smb3_do_mount+0x128/0x780 [cifs]\\n   smb3_get_tree+0xd9/0x290 [cifs]\\n   vfs_get_tree+0x2c/0x100\\n   ? capable+0x37/0x70\\n   path_mount+0x2d7/0xb80\\n   ? srso_alias_return_thunk+0x5/0xfbef5\\n   ? _raw_spin_unlock_irqrestore+0x44/0x60\\n   __x64_sys_mount+0x11a/0x150\\n   do_syscall_64+0x47/0xf0\\n   entry_SYSCALL_64_after_hwframe+0x6f/0x77\\n  RIP: 0033:0x7f8737657b1e\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.277\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.211\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.150\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.79\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.8\", \"versionStartIncluding\": \"3.7\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7\", \"versionStartIncluding\": \"3.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:16:04.679Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52434\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:16:04.679Z\", \"dateReserved\": \"2024-02-20T12:30:33.290Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-20T18:04:44.006Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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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.