{"uuid": "947f9db0-9bc1-4041-a728-78bb8079c918", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2023-52922", "type": "published-proof-of-concept", "source": "https://t.me/DarkWebInformer_CVEAlerts/18340", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2023-52922\n\ud83d\udd25 CVSS Score: N/A\n\ud83d\udd39 Description: In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: Fix UAF in bcm_proc_show()\n\nBUG: KASAN: slab-use-after-free in bcm_proc_show+0x969/0xa80\nRead of size 8 at addr ffff888155846230 by task cat/7862\n\nCPU: 1 PID: 7862 Comm: cat Not tainted 6.5.0-rc1-00153-gc8746099c197 #230\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nCall Trace:\n \n dump_stack_lvl+0xd5/0x150\n print_report+0xc1/0x5e0\n kasan_report+0xba/0xf0\n bcm_proc_show+0x969/0xa80\n seq_read_iter+0x4f6/0x1260\n seq_read+0x165/0x210\n proc_reg_read+0x227/0x300\n vfs_read+0x1d5/0x8d0\n ksys_read+0x11e/0x240\n do_syscall_64+0x35/0xb0\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nAllocated by task 7846:\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x21/0x30\n __kasan_kmalloc+0x9e/0xa0\n bcm_sendmsg+0x264b/0x44e0\n sock_sendmsg+0xda/0x180\n ____sys_sendmsg+0x735/0x920\n ___sys_sendmsg+0x11d/0x1b0\n __sys_sendmsg+0xfa/0x1d0\n do_syscall_64+0x35/0xb0\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nFreed by task 7846:\n kasan_save_stack+0x1e/0x40\n kasan_set_track+0x21/0x30\n kasan_save_free_info+0x27/0x40\n ____kasan_slab_free+0x161/0x1c0\n slab_free_freelist_hook+0x119/0x220\n __kmem_cache_free+0xb4/0x2e0\n rcu_core+0x809/0x1bd0\n\nbcm_op is freed before procfs entry be removed in bcm_release(),\nthis lead to bcm_proc_show() may read the freed bcm_op.\n\ud83d\udccf Published: 2024-11-28T15:09:51.360Z\n\ud83d\udccf Modified: 2025-06-13T20:05:35.471Z\n\ud83d\udd17 References:\n1. https://git.kernel.org/stable/c/11b8e27ed448baa385d90154a141466bd5e92f18\n2. https://git.kernel.org/stable/c/9b58d36d0c1ea29a9571e0222a9c29df0ccfb7ff\n3. https://git.kernel.org/stable/c/9533dbfac0ff7edd77a5fa2c24974b1d66c8b0a6\n4. https://git.kernel.org/stable/c/cf254b4f68e480e73dab055014e002b77aed30ed\n5. https://git.kernel.org/stable/c/3c3941bb1eb53abe7d640ffee5c4d6b559829ab3\n6. https://git.kernel.org/stable/c/995f47d76647708ec26c6e388663ad4f3f264787\n7. https://git.kernel.org/stable/c/dfd0aa26e9a07f2ce546ccf8304ead6a2914e8a7\n8. https://git.kernel.org/stable/c/55c3b96074f3f9b0aee19bf93cd71af7516582bb", "creation_timestamp": "2025-06-13T20:35:34.000000Z"}