cve-2024-36966
Vulnerability from cvelistv5
Published
2024-06-08 12:52
Modified
2024-11-05 09:28
Severity ?
EPSS score ?
Summary
erofs: reliably distinguish block based and fscache mode
References
{
"containers": {
"adp": [
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"metrics": [
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"other": {
"content": {
"id": "CVE-2024-36966",
"options": [
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"Exploitation": "none"
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"Automatable": "no"
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"Technical Impact": "partial"
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"role": "CISA Coordinator",
"timestamp": "2024-06-12T19:01:23.136909Z",
"version": "2.0.3"
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"type": "ssvc"
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"dateUpdated": "2024-06-12T19:01:35.258Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"providerMetadata": {
"dateUpdated": "2024-08-02T03:43:50.363Z",
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"url": "https://git.kernel.org/stable/c/7af2ae1b1531feab5d38ec9c8f472dc6cceb4606"
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"title": "CVE Program Container"
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"cna": {
"affected": [
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"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/erofs/super.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "aca740cecbe5",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "6.6"
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"version": "6.6.32",
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"status": "unaffected",
"version": "6.8.11",
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"status": "unaffected",
"version": "6.9",
"versionType": "original_commit_for_fix"
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"descriptions": [
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: reliably distinguish block based and fscache mode\n\nWhen erofs_kill_sb() is called in block dev based mode, s_bdev may not\nhave been initialised yet, and if CONFIG_EROFS_FS_ONDEMAND is enabled,\nit will be mistaken for fscache mode, and then attempt to free an anon_dev\nthat has never been allocated, triggering the following warning:\n\n============================================\nida_free called for id=0 which is not allocated.\nWARNING: CPU: 14 PID: 926 at lib/idr.c:525 ida_free+0x134/0x140\nModules linked in:\nCPU: 14 PID: 926 Comm: mount Not tainted 6.9.0-rc3-dirty #630\nRIP: 0010:ida_free+0x134/0x140\nCall Trace:\n \u003cTASK\u003e\n erofs_kill_sb+0x81/0x90\n deactivate_locked_super+0x35/0x80\n get_tree_bdev+0x136/0x1e0\n vfs_get_tree+0x2c/0xf0\n do_new_mount+0x190/0x2f0\n [...]\n============================================\n\nNow when erofs_kill_sb() is called, erofs_sb_info must have been\ninitialised, so use sbi-\u003efsid to distinguish between the two modes."
}
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"providerMetadata": {
"dateUpdated": "2024-11-05T09:28:58.744Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"url": "https://git.kernel.org/stable/c/f9b877a7ee312ec8ce17598a7ef85cb820d7c371"
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"title": "erofs: reliably distinguish block based and fscache mode",
"x_generator": {
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-36966",
"datePublished": "2024-06-08T12:52:59.148Z",
"dateReserved": "2024-05-30T15:25:07.081Z",
"dateUpdated": "2024-11-05T09:28:58.744Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2024-36966\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-08T13:15:57.917\",\"lastModified\":\"2024-06-10T02:52:08.267\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nerofs: reliably distinguish block based and fscache mode\\n\\nWhen erofs_kill_sb() is called in block dev based mode, s_bdev may not\\nhave been initialised yet, and if CONFIG_EROFS_FS_ONDEMAND is enabled,\\nit will be mistaken for fscache mode, and then attempt to free an anon_dev\\nthat has never been allocated, triggering the following warning:\\n\\n============================================\\nida_free called for id=0 which is not allocated.\\nWARNING: CPU: 14 PID: 926 at lib/idr.c:525 ida_free+0x134/0x140\\nModules linked in:\\nCPU: 14 PID: 926 Comm: mount Not tainted 6.9.0-rc3-dirty #630\\nRIP: 0010:ida_free+0x134/0x140\\nCall Trace:\\n \u003cTASK\u003e\\n erofs_kill_sb+0x81/0x90\\n deactivate_locked_super+0x35/0x80\\n get_tree_bdev+0x136/0x1e0\\n vfs_get_tree+0x2c/0xf0\\n do_new_mount+0x190/0x2f0\\n [...]\\n============================================\\n\\nNow when erofs_kill_sb() is called, erofs_sb_info must have been\\ninitialised, so use sbi-\u003efsid to distinguish between the two modes.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: erofs: distingue de manera confiable el modo basado en bloques y el modo fscache cuando se llama a erofs_kill_sb() en el modo basado en desarrollo de bloques, es posible que s_bdev a\u00fan no se haya inicializado y, si CONFIG_EROFS_FS_ONDEMAND est\u00e1 habilitado, se confundido con el modo fscache y luego intenta liberar un anon_dev que nunca ha sido asignado, lo que genera la siguiente advertencia: ============================= ================= ida_free solicit\u00f3 id=0 que no est\u00e1 asignado. ADVERTENCIA: CPU: 14 PID: 926 en lib/idr.c:525 ida_free+0x134/0x140 M\u00f3dulos vinculados en: CPU: 14 PID: 926 Comm: mount No contaminado 6.9.0-rc3-dirty #630 RIP: 0010:ida_free +0x134/0x140 Seguimiento de llamadas: erofs_kill_sb+0x81/0x90 desactivar_locked_super+0x35/0x80 get_tree_bdev+0x136/0x1e0 vfs_get_tree+0x2c/0xf0 do_new_mount+0x190/0x2f0 [...] ========== ================================== Ahora, cuando se llama a erofs_kill_sb(), erofs_sb_info debe haberse inicializado, as\u00ed que use sbi-\u0026gt;fsid para distinguir entre los dos modos.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/7af2ae1b1531feab5d38ec9c8f472dc6cceb4606\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dcdd49701e429c55b3644fd70fc58d85745f8cfe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f9b877a7ee312ec8ce17598a7ef85cb820d7c371\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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