{"vulnerability": "cve-2025-21669", "sightings": [{"uuid": "a46b69d9-6320-4fbc-92e0-9fb5266e886e", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-21669", "type": "seen", "source": "https://bsky.app/profile/buherator.bsky.social/post/3liwa2ghhtq2x", "content": "", "creation_timestamp": "2025-02-24T11:18:44.076267Z"}, {"uuid": "088eb224-c1f0-4724-8c8a-0f683a34897f", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-21669", "type": "seen", "source": "https://bsky.app/profile/cve-notifications.bsky.social/post/3lgzy37razh2b", "content": "", "creation_timestamp": "2025-01-31T12:16:16.519750Z"}, {"uuid": "89b8e0a7-1429-4c56-b970-b1f2613ee482", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-21669", "type": "seen", "source": "MISP/24306fae-b16b-4478-9297-d2973cdb583c", "content": "", "creation_timestamp": "2025-08-22T14:52:23.000000Z"}, {"uuid": "cbf024f8-b304-44fc-90b2-7c3d121b7693", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-21669", "type": "seen", "source": "https://t.me/DarkWebInformer_CVEAlerts/3659", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2025-21669\n\ud83d\udd25 CVSS Score: N/A\n\ud83d\udd39 Description: In the Linux kernel, the following vulnerability has been resolved:\n\nvsock/virtio: discard packets if the transport changes\n\nIf the socket has been de-assigned or assigned to another transport,\nwe must discard any packets received because they are not expected\nand would cause issues when we access vsk->transport.\n\nA possible scenario is described by Hyunwoo Kim in the attached link,\nwhere after a first connect() interrupted by a signal, and a second\nconnect() failed, we can find `vsk->transport` at NULL, leading to a\nNULL pointer dereference.\n\ud83d\udccf Published: 2025-01-31T12:33:02Z\n\ud83d\udccf Modified: 2025-01-31T12:33:02Z\n\ud83d\udd17 References:\n1. https://nvd.nist.gov/vuln/detail/CVE-2025-21669\n2. https://git.kernel.org/stable/c/2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1\n3. https://git.kernel.org/stable/c/6486915fa661584d70e8e7e4068c6c075c67dd6d\n4. https://git.kernel.org/stable/c/677579b641af109613564460a4e3bdcb16850b61\n5. https://git.kernel.org/stable/c/88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee\n6. https://git.kernel.org/stable/c/d88b249e14bd0ee1e46bbe4f456e22e01b8c68de", "creation_timestamp": "2025-01-31T13:15:15.000000Z"}, {"uuid": "3c3b94e0-4339-43d2-b31c-d6c108355518", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-21669", "type": "seen", "source": "https://t.me/cvedetector/16948", "content": "{\n  \"Source\": \"CVE FEED\",\n  \"Title\": \"CVE-2025-21669 - \"Linux Kernel Virtio Vsock NULL Pointer Dereference\"\", \n  \"Content\": \"CVE ID : CVE-2025-21669 \nPublished : Jan. 31, 2025, 12:15 p.m. | 1\u00a0hour, 34\u00a0minutes ago \nDescription : In the Linux kernel, the following vulnerability has been resolved:  \n  \nvsock/virtio: discard packets if the transport changes  \n  \nIf the socket has been de-assigned or assigned to another transport,  \nwe must discard any packets received because they are not expected  \nand would cause issues when we access vsk->transport.  \n  \nA possible scenario is described by Hyunwoo Kim in the attached link,  \nwhere after a first connect() interrupted by a signal, and a second  \nconnect() failed, we can find `vsk->transport` at NULL, leading to a  \nNULL pointer dereference. \nSeverity: 0.0 | NA \nVisit the link for more details, such as CVSS details, affected products, timeline, and more...\",\n  \"Detection Date\": \"31 Jan 2025\",\n  \"Type\": \"Vulnerability\"\n}\n\ud83d\udd39 t.me/cvedetector \ud83d\udd39", "creation_timestamp": "2025-01-31T15:22:48.000000Z"}, {"uuid": "2c39c340-690e-4134-9209-438f493bca7c", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-21669", "type": "published-proof-of-concept", "source": "https://t.me/ton618cyber/2585", "content": "#exploit\n1. CVE-2025-20029:\nCommand Injection in TMSH CLI in F5 BIG-IP\nhttps://github.com/mbadanoiu/CVE-2025-20029\n\n2. Dropping a 0 day:\nParallels Desktop Repack Root Privilege Escalation (CVE-2024-34331)\nhttps://jhftss.github.io/Parallels-0-day\n\n3. CVE-2025-21669/CVE-2025-21670:\nvsock/virtio: discard packets if the transport changes / vsock/bpf: return early if transport is not assigned (Linux Kernel)\nhttps://u1f383.github.io/linux/2025/02/24/linux-kernel-some-vsock-vulnerabilities-analysis.html", "creation_timestamp": "2025-02-28T07:48:31.000000Z"}, {"uuid": "96221d50-1b30-4a28-8026-1b8e5b8c0fae", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-21669", "type": "published-proof-of-concept", "source": "https://t.me/ton618cyber/6980", "content": "#exploit\n1. CVE-2025-20029:\nCommand Injection in TMSH CLI in F5 BIG-IP\nhttps://github.com/mbadanoiu/CVE-2025-20029\n\n2. Dropping a 0 day:\nParallels Desktop Repack Root Privilege Escalation (CVE-2024-34331)\nhttps://jhftss.github.io/Parallels-0-day\n\n3. CVE-2025-21669/CVE-2025-21670:\nvsock/virtio: discard packets if the transport changes / vsock/bpf: return early if transport is not assigned (Linux Kernel)\nhttps://u1f383.github.io/linux/2025/02/24/linux-kernel-some-vsock-vulnerabilities-analysis.html", "creation_timestamp": "2025-02-28T07:48:31.000000Z"}, {"uuid": "e5422aef-6a62-4bae-b0e4-46249b8945ab", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2025-21669", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/11859", "content": "#exploit\n1. CVE-2025-20029:\nCommand Injection in TMSH CLI in F5 BIG-IP\nhttps://github.com/mbadanoiu/CVE-2025-20029\n\n2. Dropping a 0 day:\nParallels Desktop Repack Root Privilege Escalation (CVE-2024-34331)\nhttps://jhftss.github.io/Parallels-0-day\n\n3. CVE-2025-21669/CVE-2025-21670:\nvsock/virtio: discard packets if the transport changes / vsock/bpf: return early if transport is not assigned (Linux Kernel)\nhttps://u1f383.github.io/linux/2025/02/24/linux-kernel-some-vsock-vulnerabilities-analysis.html", "creation_timestamp": "2025-02-26T00:08:02.000000Z"}]}