{"cve":{"cve_id":"CVE-2026-53062","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\ndm cache policy smq: fix missing locks in invalidating cache blocks\n\nIn passthrough mode, the policy invalidate_mapping operation is called\nsimultaneously from multiple workers, thus it should be protected by a\nlock. Otherwise, we might end up with data races on the allocated blocks\ncounter, or even use-after-free issues with internal data structures\nwhen doing concurrent writes.\n\nNote that the existing FIXME in smq_invalidate_mapping() doesn't affect\npassthrough mode since migration tasks don't exist there, but would need\nattention if supporting fast device shrinking via suspend/resume without\ntarget reloading.\n\nReproduce steps:\n\n1. Create a cache device consisting of 1024 cache entries\n\ndmsetup create cmeta --table \"0 8192 linear /dev/sdc 0\"\ndmsetup create cdata --table \"0 131072 linear /dev/sdc 8192\"\ndmsetup create corig --table \"0 262144 linear /dev/sdc 262144\"\ndd if=/dev/zero of=/dev/mapper/cmeta bs=4k count=1 oflag=direct\ndmsetup create cache --table \"0 262144 cache /dev/mapper/cmeta \\\n/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 writethrough smq 0\"\n\n2. Populate the cache, and record the number of cached blocks\n\nfio --name=populate --filename=/dev/mapper/cache --rw=randwrite --bs=4k \\\n--size=64m --direct=1\nnr_cached=$(dmsetup status cache | awk '{split($7, a, \"/\"); print a[1]}')\n\n3. Reload the cache into passthrough mode\n\ndmsetup suspend cache\ndmsetup reload cache --table \"0 262144 cache /dev/mapper/cmeta \\\n/dev/mapper/cdata /dev/mapper/corig 128 2 metadata2 passthrough smq 0\"\ndmsetup resume cache\n\n4. Write to the passthrough cache. By setting multiple jobs with I/O\n   size equal to the cache block size, cache blocks are invalidated\n   concurrently from different workers.\n\nfio --filename=/dev/mapper/cache --name=test --rw=randwrite --bs=64k \\\n--direct=1 --numjobs=2 --randrepeat=0 --size=64m\n\n5. Check if demoted matches cached block count. These numbers should\n   match but may differ due to the data race.\n\nnr_demoted=$(dmsetup status cache | awk '{print $12}')\necho \"$nr_cached, $nr_demoted\"","published_at":"2026-06-24T16:30:06.189000Z","last_modified_at":null,"cvss_v3_score":7.8,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","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/4991b5a08751e2e82488fb93ae08849b6aea10d9","https://git.kernel.org/stable/c/1b2bec4a7dcf5f00b7a1cbeeec8997841d783513","https://git.kernel.org/stable/c/9a5fdfb9e57ec3a8ad2b8fce5e5ffa42d53b130e","https://git.kernel.org/stable/c/ac5ee99443891bdb161f5539606a66a1b5e72542","https://git.kernel.org/stable/c/93627a29d4b66d4a2def938dfb8610cc80ae454b","https://git.kernel.org/stable/c/c348ae47d8e65f06429fa41adce9ad986b696766","https://git.kernel.org/stable/c/2b62d0611c9af14a16bddf22df2612b4f40eb5a1","https://git.kernel.org/stable/c/2d1f7b65f5deedd2e6b09fdc6ea27f8375f24b45"],"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":"2026-06-28T23:30:50.753831Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"4991b5a08751e2e82488fb93ae08849b6aea10d9","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:4991b5a08751e2e82488fb93ae08849b6aea10d9"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"1b2bec4a7dcf5f00b7a1cbeeec8997841d783513","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:1b2bec4a7dcf5f00b7a1cbeeec8997841d783513"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"9a5fdfb9e57ec3a8ad2b8fce5e5ffa42d53b130e","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:9a5fdfb9e57ec3a8ad2b8fce5e5ffa42d53b130e"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"ac5ee99443891bdb161f5539606a66a1b5e72542","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:ac5ee99443891bdb161f5539606a66a1b5e72542"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"93627a29d4b66d4a2def938dfb8610cc80ae454b","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:93627a29d4b66d4a2def938dfb8610cc80ae454b"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"c348ae47d8e65f06429fa41adce9ad986b696766","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:c348ae47d8e65f06429fa41adce9ad986b696766"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"2b62d0611c9af14a16bddf22df2612b4f40eb5a1","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:2b62d0611c9af14a16bddf22df2612b4f40eb5a1"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"2d1f7b65f5deedd2e6b09fdc6ea27f8375f24b45","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:2d1f7b65f5deedd2e6b09fdc6ea27f8375f24b45"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"4.12","version_start_inclusive":true,"version_end":"4.12","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:4.12:4.12"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"4.12","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:4.12"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.10.258","version_start_inclusive":true,"version_end":"5.10.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.10.258:5.10.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"5.15.209","version_start_inclusive":true,"version_end":"5.15.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:5.15.209:5.15.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.1.175","version_start_inclusive":true,"version_end":"6.1.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.1.175:6.1.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.6.141","version_start_inclusive":true,"version_end":"6.6.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.6.141:6.6.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.12.91","version_start_inclusive":true,"version_end":"6.12.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.12.91:6.12.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.33","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.33:6.18.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.10","version_start_inclusive":true,"version_end":"7.0.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.10:7.0.*"},{"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/4991b5a08751e2e82488fb93ae08849b6aea10d9","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/1b2bec4a7dcf5f00b7a1cbeeec8997841d783513","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/9a5fdfb9e57ec3a8ad2b8fce5e5ffa42d53b130e","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/ac5ee99443891bdb161f5539606a66a1b5e72542","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/93627a29d4b66d4a2def938dfb8610cc80ae454b","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/c348ae47d8e65f06429fa41adce9ad986b696766","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/2b62d0611c9af14a16bddf22df2612b4f40eb5a1","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/2d1f7b65f5deedd2e6b09fdc6ea27f8375f24b45","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-24T16:30:06.189000Z","label":"CVE published","source":null}]}