275 lines
13 KiB
JSON
275 lines
13 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2023-52849",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-05-21T15:19:24.255Z",
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"datePublished": "2024-05-21T15:31:45.884Z",
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"dateUpdated": "2026-05-23T15:27:19.904Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-23T15:27:19.904Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/mem: Fix shutdown order\n\nIra reports that removing cxl_mock_mem causes a crash with the following\ntrace:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000044\n [..]\n RIP: 0010:cxl_region_decode_reset+0x7f/0x180 [cxl_core]\n [..]\n Call Trace:\n <TASK>\n cxl_region_detach+0xe8/0x210 [cxl_core]\n cxl_decoder_kill_region+0x27/0x40 [cxl_core]\n cxld_unregister+0x29/0x40 [cxl_core]\n devres_release_all+0xb8/0x110\n device_unbind_cleanup+0xe/0x70\n device_release_driver_internal+0x1d2/0x210\n bus_remove_device+0xd7/0x150\n device_del+0x155/0x3e0\n device_unregister+0x13/0x60\n devm_release_action+0x4d/0x90\n ? __pfx_unregister_port+0x10/0x10 [cxl_core]\n delete_endpoint+0x121/0x130 [cxl_core]\n devres_release_all+0xb8/0x110\n device_unbind_cleanup+0xe/0x70\n device_release_driver_internal+0x1d2/0x210\n bus_remove_device+0xd7/0x150\n device_del+0x155/0x3e0\n ? lock_release+0x142/0x290\n cdev_device_del+0x15/0x50\n cxl_memdev_unregister+0x54/0x70 [cxl_core]\n\nThis crash is due to the clearing out the cxl_memdev's driver context\n(@cxlds) before the subsystem is done with it. This is ultimately due to\nthe region(s), that this memdev is a member, being torn down and expecting\nto be able to de-reference @cxlds, like here:\n\nstatic int cxl_region_decode_reset(struct cxl_region *cxlr, int count)\n...\n if (cxlds->rcd)\n goto endpoint_reset;\n...\n\nFix it by keeping the driver context valid until memdev-device\nunregistration, and subsequently the entire stack of related\ndependencies, unwinds."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/cxl/core/memdev.c"
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],
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"drivers/cxl/core/memdev.c"
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{
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"version": "5.15.139",
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"lessThanOrEqual": "5.15.*",
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},
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"version": "6.1.63",
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},
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"version": "6.5.12",
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"lessThanOrEqual": "6.5.*",
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"status": "unaffected",
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},
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{
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"version": "6.6.2",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.7",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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