{"vulnerability": "CVE-2023-23586", "sightings": [{"uuid": "358d39a7-a1d0-4a7f-8614-9bc210591347", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2023-23586", "type": "seen", "source": "https://u1f383.github.io/linux/2024/12/11/linux-vdso-and-vvar.html", "content": "", "creation_timestamp": "2024-12-10T23:00:00.000000Z"}, {"uuid": "53489582-5d7e-4be9-9b17-6efa9d344d3d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2023-23586", "type": "published-proof-of-concept", "source": "https://t.me/Kelvinseccommunity/2227", "content": "#exploit\n1. CVE-2024-54679:\nCyber Panel DoS\nhttps://github.com/hotplugin0x01/CVE-2024-54679\n\n2. CVE-2024-39090:\nCSRF to Stored XSS in PHP Gurukul Online Shopping Portal v2.0\nhttps://github.com/ghostwirez/CVE-2024-39090-PoC\n\n3. CVE-2023-23586:\nLinux vDSO and VVAR\nhttps://u1f383.github.io/linux/2024/12/11/linux-vdso-and-vvar.html", "creation_timestamp": "2024-12-20T18:02:36.000000Z"}, {"uuid": "a4e18ecc-dc9b-4150-8eb6-7a370b1e526a", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2023-23586", "type": "published-proof-of-concept", "source": "https://t.me/DarkWebInformer_CVEAlerts/7383", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2023-23586\n\ud83d\udd25 CVSS Score: 5.5 (cvssV3_1, Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)\n\ud83d\udd39 Description: Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process.\u00a0timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring's io_worker threads, thus it is possible to insert a time namespace's vvar page to process's memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process' memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit\u00a0 788d0824269bef539fe31a785b1517882eafed93 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring \n\n\ud83d\udccf Published: 2023-02-17T12:25:35.000Z\n\ud83d\udccf Modified: 2025-03-12T20:08:30.870Z\n\ud83d\udd17 References:\n1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93\n2. https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93", "creation_timestamp": "2025-03-12T20:42:49.000000Z"}, {"uuid": "0a4b2067-d768-4665-974e-40a5a3e0e718", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2023-23586", "type": "published-proof-of-concept", "source": "https://t.me/suboxone_chatroom/1559", "content": "#exploit\n1. CVE-2024-54679:\nCyber Panel DoS\nhttps://github.com/hotplugin0x01/CVE-2024-54679\n\n2. CVE-2024-39090:\nCSRF to Stored XSS in PHP Gurukul Online Shopping Portal v2.0\nhttps://github.com/ghostwirez/CVE-2024-39090-PoC\n\n3. CVE-2023-23586:\nLinux vDSO and VVAR\nhttps://u1f383.github.io/linux/2024/12/11/linux-vdso-and-vvar.html", "creation_timestamp": "2025-01-27T07:06:51.000000Z"}, {"uuid": "d9ca5455-ac95-4cc8-96c7-3b5800faae4d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2023-23586", "type": "published-proof-of-concept", "source": "https://t.me/cibsecurity/58430", "content": "\u203c CVE-2023-23586 \u203c\n\nDue to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process. timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring's io_worker threads, thus it is possible to insert a time namespace's vvar page to process's memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process' memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit 788d0824269bef539fe31a785b1517882eafed93 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2023-02-17T16:13:07.000000Z"}, {"uuid": "7efdd5a9-5101-4aa0-a59e-3277f206a8f9", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2023-23586", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/11581", "content": "#exploit\n1. CVE-2024-54679:\nCyber Panel DoS\nhttps://github.com/hotplugin0x01/CVE-2024-54679\n\n2. CVE-2024-39090:\nCSRF to Stored XSS in PHP Gurukul Online Shopping Portal v2.0\nhttps://github.com/ghostwirez/CVE-2024-39090-PoC\n\n3. CVE-2023-23586:\nLinux vDSO and VVAR\nhttps://u1f383.github.io/linux/2024/12/11/linux-vdso-and-vvar.html", "creation_timestamp": "2024-12-22T23:23:48.000000Z"}]}