CVE-2025-37898 (GCVE-0-2025-37898)
Vulnerability from cvelistv5
Published
2025-05-20 15:21
Modified
2025-05-26 05:23
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc64/ftrace: fix module loading without patchable function entries get_stubs_size assumes that there must always be at least one patchable function entry, which is not always the case (modules that export data but no code), otherwise it returns -ENOEXEC and thus the section header sh_size is set to that value. During module_memory_alloc() the size is passed to execmem_alloc() after being page-aligned and thus set to zero which will cause it to fail the allocation (and thus module loading) as __vmalloc_node_range() checks for zero-sized allocs and returns null: [ 115.466896] module_64: cast_common: doesn't contain __patchable_function_entries. [ 115.469189] ------------[ cut here ]------------ [ 115.469496] WARNING: CPU: 0 PID: 274 at mm/vmalloc.c:3778 __vmalloc_node_range_noprof+0x8b4/0x8f0 ... [ 115.478574] ---[ end trace 0000000000000000 ]--- [ 115.479545] execmem: unable to allocate memory Fix this by removing the check completely, since it is anyway not helpful to propagate this as an error upwards.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/358b559afec7806b9d01c2405b490e782c347022
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/534f5a8ba27863141e29766467a3e1f61bcb47ac
Impacted products
Vendor Product Version
Linux Linux Version: eec37961a56aa4f3fe1c33ffd48eec7d1bb0c009
Version: eec37961a56aa4f3fe1c33ffd48eec7d1bb0c009
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   Linux Linux Version: 6.13
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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/kernel/module_64.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc64/ftrace: fix module loading without patchable function entries\n\nget_stubs_size assumes that there must always be at least one patchable\nfunction entry, which is not always the case (modules that export data\nbut no code), otherwise it returns -ENOEXEC and thus the section header\nsh_size is set to that value. During module_memory_alloc() the size is\npassed to execmem_alloc() after being page-aligned and thus set to zero\nwhich will cause it to fail the allocation (and thus module loading) as\n__vmalloc_node_range() checks for zero-sized allocs and returns null:\n\n[  115.466896] module_64: cast_common: doesn\u0027t contain __patchable_function_entries.\n[  115.469189] ------------[ cut here ]------------\n[  115.469496] WARNING: CPU: 0 PID: 274 at mm/vmalloc.c:3778 __vmalloc_node_range_noprof+0x8b4/0x8f0\n...\n[  115.478574] ---[ end trace 0000000000000000 ]---\n[  115.479545] execmem: unable to allocate memory\n\nFix this by removing the check completely, since it is anyway not\nhelpful to propagate this as an error upwards."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:23:17.320Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/534f5a8ba27863141e29766467a3e1f61bcb47ac"
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      "title": "powerpc64/ftrace: fix module loading without patchable function entries",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37898",
    "datePublished": "2025-05-20T15:21:34.055Z",
    "dateReserved": "2025-04-16T04:51:23.964Z",
    "dateUpdated": "2025-05-26T05:23:17.320Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37898\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-20T16:15:26.177\",\"lastModified\":\"2025-05-21T20:25:16.407\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc64/ftrace: fix module loading without patchable function entries\\n\\nget_stubs_size assumes that there must always be at least one patchable\\nfunction entry, which is not always the case (modules that export data\\nbut no code), otherwise it returns -ENOEXEC and thus the section header\\nsh_size is set to that value. During module_memory_alloc() the size is\\npassed to execmem_alloc() after being page-aligned and thus set to zero\\nwhich will cause it to fail the allocation (and thus module loading) as\\n__vmalloc_node_range() checks for zero-sized allocs and returns null:\\n\\n[  115.466896] module_64: cast_common: doesn\u0027t contain __patchable_function_entries.\\n[  115.469189] ------------[ cut here ]------------\\n[  115.469496] WARNING: CPU: 0 PID: 274 at mm/vmalloc.c:3778 __vmalloc_node_range_noprof+0x8b4/0x8f0\\n...\\n[  115.478574] ---[ end trace 0000000000000000 ]---\\n[  115.479545] execmem: unable to allocate memory\\n\\nFix this by removing the check completely, since it is anyway not\\nhelpful to propagate this as an error upwards.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/358b559afec7806b9d01c2405b490e782c347022\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/534f5a8ba27863141e29766467a3e1f61bcb47ac\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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