{"uuid": "ac8f5a4b-c5f9-416a-a6b0-bf5e9793fca8", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2024-57892", "type": "published-proof-of-concept", "source": "https://t.me/DarkWebInformer_CVEAlerts/1755", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2024-57892\n\ud83d\udd39 Description: In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix slab-use-after-free due to dangling pointer dqi_priv\n\nWhen mounting ocfs2 and then remounting it as read-only, a\nslab-use-after-free occurs after the user uses a syscall to\nquota_getnextquota.  Specifically, sb_dqinfo(sb, type)->dqi_priv is the\ndangling pointer.\n\nDuring the remounting process, the pointer dqi_priv is freed but is never\nset as null leaving it to be accessed.  Additionally, the read-only option\nfor remounting sets the DQUOT_SUSPENDED flag instead of setting the\nDQUOT_USAGE_ENABLED flags.  Moreover, later in the process of getting the\nnext quota, the function ocfs2_get_next_id is called and only checks the\nquota usage flags and not the quota suspended flags.\n\nTo fix this, I set dqi_priv to null when it is freed after remounting with\nread-only and put a check for DQUOT_SUSPENDED in ocfs2_get_next_id.\n\n[akpm@linux-foundation.org: coding-style cleanups]\n\ud83d\udccf Published: 2025-01-15T13:05:44.635Z\n\ud83d\udccf Modified: 2025-01-15T13:05:44.635Z\n\ud83d\udd17 References:\n1. https://git.kernel.org/stable/c/2e3d203b1adede46bbba049e497765d67865be18\n2. https://git.kernel.org/stable/c/ba950a02d8d23811aa1120affd3adedcfac6153d\n3. https://git.kernel.org/stable/c/5f3fd772d152229d94602bca243fbb658068a597", "creation_timestamp": "2025-01-15T14:25:31.000000Z"}