{"cve":{"cve_id":"CVE-2026-53064","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: fix null-deref with concurrent writes in passthrough mode\n\nIn passthrough mode, when dm-cache starts to invalidate a cache\nentry and bio prison cell lock fails due to concurrent write to\nthe same cached block, mg->cell remains NULL. The error path in\ninvalidate_complete() attempts to unlock and free the cell\nunconditionally, causing a NULL pointer dereference:\n\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 0 UID: 0 PID: 134 Comm: fio Not tainted 6.19.0-rc7 #3 PREEMPT\nRIP: 0010:dm_cell_unlock_v2+0x3f/0x210\n<snip>\nCall Trace:\n invalidate_complete+0xef/0x430\n map_bio+0x130f/0x1a10\n cache_map+0x320/0x6b0\n __map_bio+0x458/0x510\n dm_submit_bio+0x40e/0x16d0\n __submit_bio+0x419/0x870\n<snip>\n\nReproduce steps:\n\n1. Create a cache device\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. Promote the first data block into cache\n\nfio --filename=/dev/mapper/cache --name=populate --rw=write --bs=4k \\\n--direct=1 --size=64k\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 first cached block concurrently\n\nfio --filename=/dev/mapper/cache --name test --rw=randwrite --bs=4k \\\n--randrepeat=0 --direct=1 --numjobs=2 --size 64k\n\nFix by checking if mg->cell is valid before attempting to unlock it.","published_at":"2026-06-24T16:30:07.536000Z","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/01264a6a3a3ad7ac1d73443299cd5a9568002454","https://git.kernel.org/stable/c/ee38fb00e1a80f46a4990e38f25ecb04ae7b7417","https://git.kernel.org/stable/c/c7fb6bc864c4910b344dafa36dd5028e9b980768","https://git.kernel.org/stable/c/0aa745fea1f8dc81bcdd0a45e215b6706727b482","https://git.kernel.org/stable/c/a2635d541a93fd111e743cf14b6275dc81be2abc","https://git.kernel.org/stable/c/25dcc1989c194ba2b5fb6d03cbb9b83814ac0d15","https://git.kernel.org/stable/c/df3b8ef06cc62de4fca5d2108e285085b3cffd44","https://git.kernel.org/stable/c/7d1f98d668ee34c1d15bdc0420fdd062f24a27c0"],"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":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":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"01264a6a3a3ad7ac1d73443299cd5a9568002454","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:01264a6a3a3ad7ac1d73443299cd5a9568002454"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"ee38fb00e1a80f46a4990e38f25ecb04ae7b7417","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:ee38fb00e1a80f46a4990e38f25ecb04ae7b7417"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"c7fb6bc864c4910b344dafa36dd5028e9b980768","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:c7fb6bc864c4910b344dafa36dd5028e9b980768"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"0aa745fea1f8dc81bcdd0a45e215b6706727b482","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:0aa745fea1f8dc81bcdd0a45e215b6706727b482"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"a2635d541a93fd111e743cf14b6275dc81be2abc","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:a2635d541a93fd111e743cf14b6275dc81be2abc"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"25dcc1989c194ba2b5fb6d03cbb9b83814ac0d15","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:25dcc1989c194ba2b5fb6d03cbb9b83814ac0d15"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"df3b8ef06cc62de4fca5d2108e285085b3cffd44","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:df3b8ef06cc62de4fca5d2108e285085b3cffd44"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"b29d4986d0da1a27cd35917cdb433672f5c95d7f","version_start_inclusive":true,"version_end":"7d1f98d668ee34c1d15bdc0420fdd062f24a27c0","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:b29d4986d0da1a27cd35917cdb433672f5c95d7f:7d1f98d668ee34c1d15bdc0420fdd062f24a27c0"},{"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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published","source":null}]}