{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53064", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.382Z", "datePublished": "2026-06-24T16:30:07.536Z", "dateUpdated": "2026-06-24T16:30:07.536Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-24T16:30:07.536Z" }, "descriptions": [ { "lang": "en", "value": "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\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\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." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/md/dm-cache-target.c" ], "versions": [ { "version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f", "lessThan": "01264a6a3a3ad7ac1d73443299cd5a9568002454", "status": "affected", "versionType": "git" }, { "version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f", "lessThan": "ee38fb00e1a80f46a4990e38f25ecb04ae7b7417", "status": "affected", "versionType": "git" }, { "version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f", "lessThan": "c7fb6bc864c4910b344dafa36dd5028e9b980768", "status": "affected", "versionType": "git" }, { "version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f", "lessThan": "0aa745fea1f8dc81bcdd0a45e215b6706727b482", "status": "affected", "versionType": "git" }, { "version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f", "lessThan": "a2635d541a93fd111e743cf14b6275dc81be2abc", "status": "affected", "versionType": "git" }, { "version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f", "lessThan": "25dcc1989c194ba2b5fb6d03cbb9b83814ac0d15", "status": "affected", "versionType": "git" }, { "version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f", "lessThan": "df3b8ef06cc62de4fca5d2108e285085b3cffd44", "status": "affected", "versionType": "git" }, { "version": "b29d4986d0da1a27cd35917cdb433672f5c95d7f", "lessThan": "7d1f98d668ee34c1d15bdc0420fdd062f24a27c0", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/md/dm-cache-target.c" ], "versions": [ { "version": "4.12", "status": "affected" }, { "version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.141" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/01264a6a3a3ad7ac1d73443299cd5a9568002454" }, { "url": "https://git.kernel.org/stable/c/ee38fb00e1a80f46a4990e38f25ecb04ae7b7417" }, { "url": "https://git.kernel.org/stable/c/c7fb6bc864c4910b344dafa36dd5028e9b980768" }, { "url": "https://git.kernel.org/stable/c/0aa745fea1f8dc81bcdd0a45e215b6706727b482" }, { "url": "https://git.kernel.org/stable/c/a2635d541a93fd111e743cf14b6275dc81be2abc" }, { "url": "https://git.kernel.org/stable/c/25dcc1989c194ba2b5fb6d03cbb9b83814ac0d15" }, { "url": "https://git.kernel.org/stable/c/df3b8ef06cc62de4fca5d2108e285085b3cffd44" }, { "url": "https://git.kernel.org/stable/c/7d1f98d668ee34c1d15bdc0420fdd062f24a27c0" } ], "title": "dm cache: fix null-deref with concurrent writes in passthrough mode", "x_generator": { "engine": "bippy-1.2.0" } } } }