{
  "cveId": "CVE-2023-52562",
  "url": "https://patchblox.com/security/cve/CVE-2023-52562",
  "summary": "CVE-2023-52562 is fixed in 37 products on 1 platform, first by ALAS2023-2023-385, released October 12, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  mm/slab_common: fix slab_caches list corruption...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mm/slab_common: fix slab_caches list corruption after kmem_cache_destroy()  After the commit in Fixes:, if a module that created a slab cache does not release all of its allocated objects before destroying the cache (at rmmod time), we might end up releasing the kmem_cache object without removing it from the slab_caches list thus corrupting the list as kmem_cache_destroy() ignores the return value from shutdown_cache(), which in turn never removes the kmem_cache object from slabs_list in case __kmem_cache_shutdown() fails to release all of the cache\u0027s slabs.  This is easily observable on a kernel built with CONFIG_DEBUG_LIST=y as after that ill release the system will immediately trip on list_add, or list_del, assertions similar to the one shown below as soon as another kmem_cache gets created, or destroyed:    [ 1041.213632] list_del corruption. next-\u003Eprev should be ffff89f596fb5768, but was 52f1e5016aeee75d. (next=ffff89f595a1b268)   [ 1041.219165] ------------[ cut here ]------------   [ 1041.221517] kernel BUG at lib/list_debug.c:62!   [ 1041.223452] invalid opcode: 0000 [#1] PREEMPT SMP PTI   [ 1041.225408] CPU: 2 PID: 1852 Comm: rmmod Kdump: loaded Tainted: G    B   W  OE      6.5.0 #15   [ 1041.228244] Hardware name: QEMU Standard PC (Q35 \u002B ICH9, 2009), BIOS edk2-20230524-3.fc37 05/24/2023   [ 1041.231212] RIP: 0010:__list_del_entry_valid\u002B0xae/0xb0  Another quick way to trigger this issue, in a kernel with CONFIG_SLUB=y, is to set slub_debug to poison the released objects and then just run cat /proc/slabinfo after removing the module that leaks slab objects, in which case the kernel will panic:    [   50.954843] general protection fault, probably for non-canonical address 0xa56b6b6b6b6b6b8b: 0000 [#1] PREEMPT SMP PTI   [   50.961545] CPU: 2 PID: 1495 Comm: cat Kdump: loaded Tainted: G    B   W  OE      6.5.0 #15   [   50.966808] Hardware name: QEMU Standard PC (Q35 \u002B ICH9, 2009), BIOS edk2-20230524-3.fc37 05/24/2023   [   50.972663] RIP: 0010:get_slabinfo\u002B0x42/0xf0  This patch fixes this issue by properly checking shutdown_cache()\u0027s return value before taking the kmem_cache_release() branch.",
  "published": "2023-10-12T16:11:00Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00222,
  "epssPercentile": 0.12885,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
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