{"cve":{"cve_id":"CVE-2026-53274","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: fix sleep-inside-lock in __smc_setsockopt() causing local DoS\n\nA logic flaw in __smc_setsockopt() allows a local unprivileged user to\ncause a Denial of Service (DoS) by holding the socket lock indefinitely.\n\nThe function __smc_setsockopt() calls copy_from_sockptr() while holding\nlock_sock(sk). By passing a userfaultfd-monitored memory page (or\nFUSE-backed memory on systems where unprivileged userfaultfd is disabled)\nas the optval, an attacker can halt execution during the copy operation,\nkeeping the lock held.\n\nCombined with asynchronous tear-down operations like shutdown(), this\nexhausts the kernel wq (kworkers) and triggers the hung task watchdog.\n\n[  240.123456] INFO: task kworker/u8:2 blocked for more than 120 seconds.\n[  240.123489] Call Trace:\n[  240.123501]  smc_shutdown+...\n[  240.123512]  lock_sock_nested+...\n\nThis patch moves the user-space copy outside the lock_sock() critical\nsection to prevent the issue.","published_at":"2026-06-25T08:39:58.478000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/35a22117839602bb52283de08894c5a7dde92420","https://git.kernel.org/stable/c/5d27d2ffe487df89ce28fda0410eafa05dbe03a0","https://git.kernel.org/stable/c/89f6fbe0033c942cb790ffd53ca93a45eeaf1c91","https://git.kernel.org/stable/c/dcd90f42a33e4220385f27b515183d0c91b2fc4a","https://git.kernel.org/stable/c/94d286fa5eedc550d42bcb9c85416af8f77736ff","https://git.kernel.org/stable/c/a3fdd924d88c30b9f488636ce0e4696012cf5511"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:51.545322Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a6a6fe27bab48f0d09a64b051e7bde432fcae081","version_start_inclusive":true,"version_end":"35a22117839602bb52283de08894c5a7dde92420","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a6a6fe27bab48f0d09a64b051e7bde432fcae081:35a22117839602bb52283de08894c5a7dde92420"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a6a6fe27bab48f0d09a64b051e7bde432fcae081","version_start_inclusive":true,"version_end":"5d27d2ffe487df89ce28fda0410eafa05dbe03a0","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a6a6fe27bab48f0d09a64b051e7bde432fcae081:5d27d2ffe487df89ce28fda0410eafa05dbe03a0"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a6a6fe27bab48f0d09a64b051e7bde432fcae081","version_start_inclusive":true,"version_end":"89f6fbe0033c942cb790ffd53ca93a45eeaf1c91","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a6a6fe27bab48f0d09a64b051e7bde432fcae081:89f6fbe0033c942cb790ffd53ca93a45eeaf1c91"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a6a6fe27bab48f0d09a64b051e7bde432fcae081","version_start_inclusive":true,"version_end":"dcd90f42a33e4220385f27b515183d0c91b2fc4a","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a6a6fe27bab48f0d09a64b051e7bde432fcae081:dcd90f42a33e4220385f27b515183d0c91b2fc4a"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a6a6fe27bab48f0d09a64b051e7bde432fcae081","version_start_inclusive":true,"version_end":"94d286fa5eedc550d42bcb9c85416af8f77736ff","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a6a6fe27bab48f0d09a64b051e7bde432fcae081:94d286fa5eedc550d42bcb9c85416af8f77736ff"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"a6a6fe27bab48f0d09a64b051e7bde432fcae081","version_start_inclusive":true,"version_end":"a3fdd924d88c30b9f488636ce0e4696012cf5511","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:a6a6fe27bab48f0d09a64b051e7bde432fcae081:a3fdd924d88c30b9f488636ce0e4696012cf5511"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.18","version_start_inclusive":true,"version_end":"5.18","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.18:5.18"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"5.18","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:5.18"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1.176","version_start_inclusive":true,"version_end":"6.1.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1.176:6.1.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.6.143","version_start_inclusive":true,"version_end":"6.6.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.6.143:6.6.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.94","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.94:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.36","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.36:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.13","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.13:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/35a22117839602bb52283de08894c5a7dde92420","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/5d27d2ffe487df89ce28fda0410eafa05dbe03a0","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/89f6fbe0033c942cb790ffd53ca93a45eeaf1c91","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/dcd90f42a33e4220385f27b515183d0c91b2fc4a","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/94d286fa5eedc550d42bcb9c85416af8f77736ff","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/a3fdd924d88c30b9f488636ce0e4696012cf5511","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-25T08:39:58.478000Z","label":"CVE published","source":null}]}