cve-2026-64165
MEDIUM CVSS 5.5 opencve
Description
In the Linux kernel, the following vulnerability has been resolved: ARM: integrator: Fix early initialization Starting with commit bdb249fce9ad4 ("ARM: integrator: read counter using syscon/regmap"), intcp_init_early calls syscon_regmap_lookup_by_compatible which in turn calls of_syscon_register. This function allocates memory. Since the memory management code has not been initialized at that time, the call always fails. It either returns -ENOMEM or crashes as follows. Unable to handle kernel NULL pointer dereference at virtual address 0000000c when read [0000000c] *pgd=00000000 Internal error: Oops: 5 [#1] ARM Modules linked in: CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.15.0-rc5-00026-g5fcc9bf84ee5 #1 PREEMPT Hardware name: ARM Integrator/CP (Device Tree) PC is at __kmalloc_cache_noprof+0xec/0x39c LR is at __kmalloc_cache_noprof+0x34/0x39c ... Call trace: __kmalloc_cache_noprof from of_syscon_register+0x7c/0x310 of_syscon_register from device_node_get_regmap+0xa4/0xb0 device_node_get_regmap from intcp_init_early+0xc/0x40 intcp_init_early from start_kernel+0x60/0x688 start_kernel from 0x0 The crash is seen due to a dereferenced pointer which is not supposed to be NULL but is NULL if the memory management subsystem has not been initialized. The crash is not seen with all versions of gcc. Some versions such as gcc 9.x apparently do not dereference the pointer, presumably if tracing is disabled. The problem has been reproduced with gcc 10.x, 11.x, and 13.x. Either case, if the crash is not seen, the call to syscon_regmap_lookup_by_compatible returns -ENOMEM, and sched_clock_register is never called. Fix the problem by moving the early initialization code into the standard machine initialization code.
Timeline
- Published
- 2026-07-19 16:17 UTC
- Last Modified
- 2026-08-13
CVSS Details
CVSS details not available.
Affected Products
No product information available.
Weaknesses (CWE)
CVSS metrics
| Version | Base | Severity | Vector | Exploitability | Impact | Source |
|---|---|---|---|---|---|---|
| 3.1 | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
nvd | ||
| 3.1 | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
opencve |
References
No references available.
Linked Vulnerabilities
No linked vulnerabilities found.
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"description": "In the Linux kernel, the following vulnerability has been resolved:\n\nARM: integrator: Fix early initialization\n\nStarting with commit bdb249fce9ad4 (\"ARM: integrator: read counter using\nsyscon/regmap\"), intcp_init_early calls syscon_regmap_lookup_by_compatible\nwhich in turn calls of_syscon_register. This function allocates memory.\nSince the memory management code has not been initialized at that time,\nthe call always fails. It either returns -ENOMEM or crashes as follows.\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000c when read\n[0000000c] *pgd=00000000\nInternal error: Oops: 5 [#1] ARM\nModules linked in:\nCPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.15.0-rc5-00026-g5fcc9bf84ee5 #1 PREEMPT\nHardware name: ARM Integrator/CP (Device Tree)\nPC is at __kmalloc_cache_noprof+0xec/0x39c\nLR is at __kmalloc_cache_noprof+0x34/0x39c\n...\nCall trace:\n __kmalloc_cache_noprof from of_syscon_register+0x7c/0x310\n of_syscon_register from device_node_get_regmap+0xa4/0xb0\n device_node_get_regmap from intcp_init_early+0xc/0x40\n intcp_init_early from start_kernel+0x60/0x688\n start_kernel from 0x0\n\nThe crash is seen due to a dereferenced pointer which is not supposed to be\nNULL but is NULL if the memory management subsystem has not been\ninitialized. The crash is not seen with all versions of gcc. Some versions\nsuch as gcc 9.x apparently do not dereference the pointer, presumably if\ntracing is disabled. The problem has been reproduced with gcc 10.x, 11.x,\nand 13.x. Either case, if the crash is not seen, the call to\nsyscon_regmap_lookup_by_compatible returns -ENOMEM, and\nsched_clock_register is never called.\n\nFix the problem by moving the early initialization code into the standard\nmachine initialization code.",
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"data": "In the Linux kernel, the following vulnerability has been resolved:\n\nARM: integrator: Fix early initialization\n\nStarting with commit bdb249fce9ad4 (\"ARM: integrator: read counter using\nsyscon/regmap\"), intcp_init_early calls syscon_regmap_lookup_by_compatible\nwhich in turn calls of_syscon_register. This function allocates memory.\nSince the memory management code has not been initialized at that time,\nthe call always fails. It either returns -ENOMEM or crashes as follows.\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000c when read\n[0000000c] *pgd=00000000\nInternal error: Oops: 5 [#1] ARM\nModules linked in:\nCPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.15.0-rc5-00026-g5fcc9bf84ee5 #1 PREEMPT\nHardware name: ARM Integrator/CP (Device Tree)\nPC is at __kmalloc_cache_noprof+0xec/0x39c\nLR is at __kmalloc_cache_noprof+0x34/0x39c\n...\nCall trace:\n __kmalloc_cache_noprof from of_syscon_register+0x7c/0x310\n of_syscon_register from device_node_get_regmap+0xa4/0xb0\n device_node_get_regmap from intcp_init_early+0xc/0x40\n intcp_init_early from start_kernel+0x60/0x688\n start_kernel from 0x0\n\nThe crash is seen due to a dereferenced pointer which is not supposed to be\nNULL but is NULL if the memory management subsystem has not been\ninitialized. The crash is not seen with all versions of gcc. Some versions\nsuch as gcc 9.x apparently do not dereference the pointer, presumably if\ntracing is disabled. The problem has been reproduced with gcc 10.x, 11.x,\nand 13.x. Either case, if the crash is not seen, the call to\nsyscon_regmap_lookup_by_compatible returns -ENOMEM, and\nsched_clock_register is never called.\n\nFix the problem by moving the early initialization code into the standard\nmachine initialization code.",
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"title": {
"data": "ARM: integrator: Fix early initialization",
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"description": "A flaw was found in the Linux kernel, specifically within the ARM Integrator/CP architecture. During early system initialization, a memory allocation function is called before the memory management system is fully ready. This can lead to a kernel crash, resulting in a Denial of Service (DoS) for the affected system. In some cases, it may also prevent the system clock from being properly registered.",
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"https://www.cve.org/CVERecord?id=CVE-2026-64165"
],
"title": "kernel: ARM: integrator: Fix early initialization",
"updated": "2026-07-19T00:00:00+00:00",
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Enrichment data
Aggregated bundle (all enrichments)