Answer in brief
CVE-2024-26906 records a Unknown severity vulnerability in x86/mm: Disallow vsyscall page read for copy_from_kernel_nofault(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=75a1a607bb7e6d918be3aca11ec2214a275392f4 <6e4694e65b6db4c3de125115dd4f55848cc48381 || >=75a1a607bb7e6d918be3aca11ec2214a275392f4 <e8a67fe34b76a49320b33032228a794f40b0316b || >=75a1a607bb7e6d918be3aca11ec2214a275392f4 <f175de546a3eb77614d94d4c02550181c0a8493e || >=75a1a607bb7e6d918be3aca11ec2214a275392f4 <57f78c46f08198e1be08ffe99c4c1ccc12855bf5 || >=75a1a607bb7e6d918be3aca11ec2214a275392f4 <29bd6f86904682adafe9affbc7f79b14defcaff8 || >=75a1a607bb7e6d918be3aca11ec2214a275392f4 <32019c659ecfe1d92e3bf9fcdfbb11a7c70acd58 | 6e4694e65b6db4c3de125115dd4f55848cc48381, e8a67fe34b76a49320b33032228a794f40b0316b, f175de546a3eb77614d94d4c02550181c0a8493e, 57f78c46f08198e1be08ffe99c4c1ccc12855bf5, 29bd6f86904682adafe9affbc7f79b14defcaff8, 32019c659ecfe1d92e3bf9fcdfbb11a7c70acd58 |
| Linux/Linuxgeneric | 5.5 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <V1.1.1 | V1.1.1 |
Published upstream
Apr 17, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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().
Quoted source text, attributed separately from HOL analysis.