{"id":"CVE-2022-2586","kind":"vulnerability","aliases":["CVE-2022-2586"],"related":[],"title":"It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a…","description":"Linux Kernel contains a use-after-free vulnerability in the nft_object, allowing local attackers to escalate privileges.\n\nCISA required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.","summary":"A use-after-free bug in the Linux kernel's nft_object code (nf_tables) lets a local user corrupt kernel memory. An attacker with a local shell can escalate privileges to root.","severity":"high","cvss":7.8,"epss":null,"exploited":true,"exploited_at":"2024-06-26T00:00:00+00:00","products":[{"name":"siemens simatic s7-1500 tm mfp firmware","fixed":["1.1"],"affected":"< 1.1","ecosystem":"vendor"},{"name":"siemens sinec os","fixed":["2.4"],"affected":"< 2.4","ecosystem":"vendor"},{"name":"linux kernel","fixed":["4.14.316"],"affected":">= 3.16, < 4.14.316","ecosystem":"vendor"},{"name":"linux kernel","fixed":["4.19.256"],"affected":">= 4.15, < 4.19.256","ecosystem":"vendor"},{"name":"linux kernel","fixed":["5.4.211"],"affected":">= 4.20, < 5.4.211","ecosystem":"vendor"},{"name":"linux kernel","fixed":["5.10.137"],"affected":">= 5.5, < 5.10.137","ecosystem":"vendor"},{"name":"linux kernel","fixed":["5.15.61"],"affected":">= 5.11, < 5.15.61","ecosystem":"vendor"},{"name":"linux kernel","fixed":["5.18.18"],"affected":">= 5.16, < 5.18.18","ecosystem":"vendor"},{"name":"linux kernel","fixed":["5.19.2"],"affected":">= 5.19, < 5.19.2","ecosystem":"vendor"},{"name":"canonical ubuntu linux","fixed":[],"affected":"= 14.04","ecosystem":"vendor"},{"name":"canonical ubuntu linux","fixed":[],"affected":"= 16.04","ecosystem":"vendor"},{"name":"canonical ubuntu linux","fixed":[],"affected":"= 18.04","ecosystem":"vendor"},{"name":"canonical ubuntu linux","fixed":[],"affected":"= 20.04","ecosystem":"vendor"},{"name":"canonical ubuntu linux","fixed":[],"affected":"= 22.04","ecosystem":"vendor"},{"name":"Linux Kernel","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["exploited","infrastructure","kubernetes","linux","self-hosted"],"not_affected_if":["default-config"],"how_to_check":null,"fix":"Apply the kernel update from your distribution or vendor, per CISA's required action; move to a kernel release that includes the upstream fix.\nIf no update is available, discontinue use of the affected system.","status":"open","published_at":"2024-01-08T18:15:44+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:58:40+00:00","updated_at":"2026-10-24T00:09:51+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-10-23T20:58:40Z","model":"claude-haiku-5-5","output":{"fix":"Apply the kernel update from your distribution or vendor, per CISA's required action; move to a kernel release that includes the upstream fix.\nIf no update is available, discontinue use of the affected system.","reach":"local","impact":"high","summary":"A use-after-free bug in the Linux kernel's nft_object code (nf_tables) lets a local user corrupt kernel memory. An attacker with a local shell can escalate privileges to root.","category":"infrastructure","who_cares":["linux","self-hosted","kubernetes"],"confidence":0.6,"needs_auth":"yes","worst_case":"Local user gains root privileges on the kernel host.","analyst_note":"Find affected and fixed kernel versions and the nf_tables config requirement in the NVD or kernel.org CVE-2022-2586 entry; the sources here do not list them.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["default-config"],"user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000459,"input_tokens":2793,"output_tokens":360,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-1500':30A '-2022':22A,25A '-2586':23A,26A 'action':130C 'allow':122C 'appli':131C 'attack':99B,124C 'bug':80B 'canonical':51A,54A,57A,60A,63A 'cisa':128C 'code':88B 'contain':111C 'corrupt':95B 'could':10A 'cve':21A,24A 'differ':17A 'discontinu':137C 'discov':3A 'escal':105B,126C 'exploit':68B 'express':9A 'firmware':33A 'free':79B,116C 'host':74B 'infrastructur':69B 'instruct':135C 'kernel':38A,40A,42A,44A,46A,48A,50A,67A,84B,96B,110C 'kubernet':70B 'lead':20A 'let':91B 'linux':37A,39A,41A,43A,45A,47A,49A,53A,56A,59A,62A,65A,66A,71B,83B,109C 'local':93B,102B,123C 'memori':97B 'mfp':32A 'nf':89B 'nft':6A,13A,18A,86B,120C 'object':7A,87B,121C 'os':36A 'per':133C 'privileg':106B,127C 'product':141C 'refer':11A 'requir':129C 'root':108B 's7':29A 'self':73B 'self-host':72B 'set':14A 'shell':103B 'siemens':27A,34A 'simatic':28A 'sinec':35A 'tabl':19A,90B 'tm':31A 'ubuntu':52A,55A,58A,61A,64A 'unavail':145C 'updat':132C,143C 'use':77B,114C,138C 'use-after-fre':76B,113C 'user':94B 'vendor':134C 'vulner':117C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2024-01-08T18:15:44+00:00","kev":{"dateAdded":"2024-06-26","dueDate":"2024-07-17","requiredAction":"Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H","cvss_by":"security@ubuntu.com","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2022-2586","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2022-2586","severity":null,"published_at":"2024-06-26T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T15:39:41+00:00","note":null},{"source":"nvd","external_id":"CVE-2022-2586","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-2586","severity":null,"published_at":"2024-01-08T18:15:44+00:00","modified_at":"2026-10-14T18:25:45+00:00","first_seen_at":"2026-10-23T22:29:05+00:00","fetched_at":"2026-10-23T22:29:05+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}