CVE-2024-26906 (GCVE-0-2024-26906)

Vulnerability from cvelistv5 – Published: 2024-04-17 10:27 – Updated: 2026-01-05 10:34
VLAI?
Title
x86/mm: Disallow vsyscall page read for copy_from_kernel_nofault()
Summary
In the Linux kernel, the following vulnerability has been resolved: x86/mm: Disallow vsyscall page read for copy_from_kernel_nofault() When trying to use copy_from_kernel_nofault() to read vsyscall page through a bpf program, the following oops was reported: BUG: unable to handle page fault for address: ffffffffff600000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 3231067 P4D 3231067 PUD 3233067 PMD 3235067 PTE 0 Oops: 0000 [#1] PREEMPT SMP PTI CPU: 1 PID: 20390 Comm: test_progs ...... 6.7.0+ #58 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ...... RIP: 0010:copy_from_kernel_nofault+0x6f/0x110 ...... Call Trace: <TASK> ? copy_from_kernel_nofault+0x6f/0x110 bpf_probe_read_kernel+0x1d/0x50 bpf_prog_2061065e56845f08_do_probe_read+0x51/0x8d trace_call_bpf+0xc5/0x1c0 perf_call_bpf_enter.isra.0+0x69/0xb0 perf_syscall_enter+0x13e/0x200 syscall_trace_enter+0x188/0x1c0 do_syscall_64+0xb5/0xe0 entry_SYSCALL_64_after_hwframe+0x6e/0x76 </TASK> ...... ---[ end trace 0000000000000000 ]--- The oops is triggered when: 1) A bpf program uses bpf_probe_read_kernel() to read from the vsyscall page and invokes copy_from_kernel_nofault() which in turn calls __get_user_asm(). 2) Because the vsyscall page address is not readable from kernel space, a page fault exception is triggered accordingly. 3) handle_page_fault() considers the vsyscall page address as a user space address instead of a kernel space address. This results in the fix-up setup by bpf not being applied and a page_fault_oops() is invoked due to SMAP. Considering handle_page_fault() has already considered the vsyscall page address as a userspace address, fix the problem by disallowing vsyscall page read for copy_from_kernel_nofault().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 75a1a607bb7e6d918be3aca11ec2214a275392f4 , < 6e4694e65b6db4c3de125115dd4f55848cc48381 (git)
Affected: 75a1a607bb7e6d918be3aca11ec2214a275392f4 , < e8a67fe34b76a49320b33032228a794f40b0316b (git)
Affected: 75a1a607bb7e6d918be3aca11ec2214a275392f4 , < f175de546a3eb77614d94d4c02550181c0a8493e (git)
Affected: 75a1a607bb7e6d918be3aca11ec2214a275392f4 , < 57f78c46f08198e1be08ffe99c4c1ccc12855bf5 (git)
Affected: 75a1a607bb7e6d918be3aca11ec2214a275392f4 , < 29bd6f86904682adafe9affbc7f79b14defcaff8 (git)
Affected: 75a1a607bb7e6d918be3aca11ec2214a275392f4 , < 32019c659ecfe1d92e3bf9fcdfbb11a7c70acd58 (git)
Create a notification for this product.
    Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (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 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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reported:\\n\\n  BUG: unable to handle page fault for address: ffffffffff600000\\n  #PF: supervisor read access in kernel mode\\n  #PF: error_code(0x0000) - not-present page\\n  PGD 3231067 P4D 3231067 PUD 3233067 PMD 3235067 PTE 0\\n  Oops: 0000 [#1] PREEMPT SMP PTI\\n  CPU: 1 PID: 20390 Comm: test_progs ...... 6.7.0+ #58\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) ......\\n  RIP: 0010:copy_from_kernel_nofault+0x6f/0x110\\n  ......\\n  Call Trace:\\n   \u003cTASK\u003e\\n   ? copy_from_kernel_nofault+0x6f/0x110\\n   bpf_probe_read_kernel+0x1d/0x50\\n   bpf_prog_2061065e56845f08_do_probe_read+0x51/0x8d\\n   trace_call_bpf+0xc5/0x1c0\\n   perf_call_bpf_enter.isra.0+0x69/0xb0\\n   perf_syscall_enter+0x13e/0x200\\n   syscall_trace_enter+0x188/0x1c0\\n   do_syscall_64+0xb5/0xe0\\n   entry_SYSCALL_64_after_hwframe+0x6e/0x76\\n   \u003c/TASK\u003e\\n  ......\\n  ---[ end trace 0000000000000000 ]---\\n\\nThe oops is triggered when:\\n\\n1) A bpf program uses bpf_probe_read_kernel() to read from the vsyscall\\npage and invokes copy_from_kernel_nofault() which in turn calls\\n__get_user_asm().\\n\\n2) Because the vsyscall page address is not readable from kernel space,\\na page fault exception is triggered accordingly.\\n\\n3) handle_page_fault() considers the vsyscall page address as a user\\nspace address instead of a kernel space address. This results in the\\nfix-up setup by bpf not being applied and a page_fault_oops() is invoked\\ndue to SMAP.\\n\\nConsidering handle_page_fault() has already considered the vsyscall page\\naddress as a userspace address, fix the problem by disallowing vsyscall\\npage read for copy_from_kernel_nofault().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.214\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.153\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.83\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.23\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.11\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"5.5\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:34:56.268Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26906\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:34:56.268Z\", \"dateReserved\": \"2024-02-19T14:20:24.187Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-17T10:27:53.573Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Detection rules are retrieved from Rulezet.