{"vulnerability": "CVE-2025-21636", "sightings": [{"uuid": "21b6b96a-9219-4050-b11a-470110a761e3", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2025-21636", "type": "published-proof-of-concept", "source": "https://t.me/DarkWebInformer_CVEAlerts/2329", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2025-21636\n\ud83d\udd39 Description: In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: sysctl: plpmtud_probe_interval: avoid using current->nsproxy\n\nAs mentioned in a previous commit of this series, using the 'net'\nstructure via 'current' is not recommended for different reasons:\n\n- Inconsistency: getting info from the reader's/writer's netns vs only\n  from the opener's netns.\n\n- current->nsproxy can be NULL in some cases, resulting in an 'Oops'\n  (null-ptr-deref), e.g. when the current task is exiting, as spotted by\n  syzbot [1] using acct(2).\n\nThe 'net' structure can be obtained from the table->data using\ncontainer_of().\n\nNote that table->data could also be used directly, as this is the only\nmember needed from the 'net' structure, but that would increase the size\nof this fix, to use '*data' everywhere 'net->sctp.probe_interval' is\nused.\n\ud83d\udccf Published: 2025-01-19T10:17:54.576Z\n\ud83d\udccf Modified: 2025-01-19T10:17:54.576Z\n\ud83d\udd17 References:\n1. https://git.kernel.org/stable/c/44ee8635922b6eb940faddb961a8347c6857d722\n2. https://git.kernel.org/stable/c/284a221f8fa503628432c7bb5108277c688c6ffa\n3. https://git.kernel.org/stable/c/bcf8c60074e81ed2ac2d35130917175a3949c917\n4. https://git.kernel.org/stable/c/6259d2484d0ceff42245d1f09cc8cb6ee72d847a", "creation_timestamp": "2025-01-19T10:58:35.000000Z"}, {"uuid": "adc424dc-0a6a-4816-8ec7-0859ca215f0e", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2025-21636", "type": "seen", "source": "https://t.me/cvedetector/15829", "content": "{\n  \"Source\": \"CVE FEED\",\n  \"Title\": \"CVE-2025-21636 - Linux Kernel SCTP sysctl NULL Pointer Dereference Vulnerability\", \n  \"Content\": \"CVE ID : CVE-2025-21636 \nPublished : Jan. 19, 2025, 11:15 a.m. | 35\u00a0minutes ago \nDescription : In the Linux kernel, the following vulnerability has been resolved:  \n  \nsctp: sysctl: plpmtud_probe_interval: avoid using current->nsproxy  \n  \nAs mentioned in a previous commit of this series, using the 'net'  \nstructure via 'current' is not recommended for different reasons:  \n  \n- Inconsistency: getting info from the reader's/writer's netns vs only  \n  from the opener's netns.  \n  \n- current->nsproxy can be NULL in some cases, resulting in an 'Oops'  \n  (null-ptr-deref), e.g. when the current task is exiting, as spotted by  \n  syzbot [1] using acct(2).  \n  \nThe 'net' structure can be obtained from the table->data using  \ncontainer_of().  \n  \nNote that table->data could also be used directly, as this is the only  \nmember needed from the 'net' structure, but that would increase the size  \nof this fix, to use '*data' everywhere 'net->sctp.probe_interval' is  \nused. \nSeverity: 0.0 | NA \nVisit the link for more details, such as CVSS details, affected products, timeline, and more...\",\n  \"Detection Date\": \"19 Jan 2025\",\n  \"Type\": \"Vulnerability\"\n}\n\ud83d\udd39 t.me/cvedetector \ud83d\udd39", "creation_timestamp": "2025-01-19T13:07:14.000000Z"}, {"uuid": "5bc215a1-e09c-43b9-aaf7-999ecc711609", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2025-21636", "type": "seen", "source": "https://infosec.exchange/users/cve/statuses/113854599992003984", "content": "", "creation_timestamp": "2025-01-19T10:42:05.819191Z"}, {"uuid": "c723e37f-f644-4a8b-93f0-797dee8092d5", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2025-21636", "type": "seen", "source": "https://bsky.app/profile/cve-notifications.bsky.social/post/3lg3p3n6ii62c", "content": "", "creation_timestamp": "2025-01-19T11:15:34.596324Z"}, {"uuid": "83ba1a12-b3bb-4f41-9ac3-564eefeea6f6", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2025-21636", "type": "seen", "source": "https://bsky.app/profile/cve.skyfleet.blue/post/3lg3qyyltng2b", "content": "", "creation_timestamp": "2025-01-19T11:49:55.489347Z"}]}