{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64192", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.040Z", "datePublished": "2026-07-20T16:27:51.720Z", "dateUpdated": "2026-08-23T12:45:34.754Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-23T12:45:34.754Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM is uninitialized\n\nWhen CONFIG_BPF_LSM=y is set, BPF inode storage maps\n(BPF_MAP_TYPE_INODE_STORAGE) are compiled into the kernel. However,\nif the BPF LSM is not explicitly enabled at boot time (e.g. omitted\nfrom the \"lsm=\" boot parameter), lsm_prepare() is never executed for\nthe BPF LSM.\n\nConsequently, the BPF inode security blob offset\n(bpf_lsm_blob_sizes.lbs_inode) is never initialized and remains at\nits default compiled size of 8 bytes instead of being updated to a\nvalid offset past the reserved struct rcu_head (typically 16 bytes\nor more).\n\nWhen a privileged user creates and updates a BPF_MAP_TYPE_INODE_STORAGE\nmap, bpf_inode() evaluates inode->i_security + 8. This erroneously\naliases the struct rcu_head.func callback pointer at the beginning\nof the inode->i_security blob. During subsequent map element cleanup\nor inode destruction, writing NULL to owner_storage clears the queued\nRCU callback pointer. When rcu_do_batch() later executes the queued\ncallback, it attempts an instruction fetch at address 0x0, triggering\nan immediate kernel panic.\n\nFix this by introducing a global bpf_lsm_initialized boolean flag\nmarked with __ro_after_init. Set this flag to true inside bpf_lsm_init()\nwhen the LSM framework successfully registers the BPF LSM. Gate map\nallocation in inode_storage_map_alloc() on this flag, returning\n-EOPNOTSUPP if the BPF LSM is in turn uninitialized.\n\nThis fail-fast approach prevents userspace from allocating inode\nstorage maps when the supporting BPF LSM infrastructure is absent,\navoiding zombie map states." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/linux/bpf_lsm.h", "kernel/bpf/bpf_inode_storage.c", "security/bpf/hooks.c" ], "versions": [ { "version": "8ea636848aca35b9f97c5b5dee30225cf2dd0fe6", "lessThan": "413b14b9623a2e6ee131c2b2152b304aeb04e378", "status": "affected", "versionType": "git" }, { "version": "8ea636848aca35b9f97c5b5dee30225cf2dd0fe6", "lessThan": "a6d634f794c808a261eac7d5af023a7e06b9ecd8", "status": "affected", "versionType": "git" }, { "version": "8ea636848aca35b9f97c5b5dee30225cf2dd0fe6", "lessThan": "721f669853bdbf46b475a81bb5d05d610f8c19de", "status": "affected", "versionType": "git" }, { "version": "8ea636848aca35b9f97c5b5dee30225cf2dd0fe6", "lessThan": "5337eebdf8c5d4810b1913047f078d2815d5645f", "status": "affected", "versionType": "git" }, { "version": "8ea636848aca35b9f97c5b5dee30225cf2dd0fe6", "lessThan": "de984ea883405420fdc416ae8964b752df586970", "status": "affected", "versionType": "git" }, { "version": "8ea636848aca35b9f97c5b5dee30225cf2dd0fe6", "lessThan": "267fdd9b6530c399dfd996e1a0a7628b45baf9f0", "status": "affected", "versionType": "git" }, { "version": "8ea636848aca35b9f97c5b5dee30225cf2dd0fe6", "lessThan": "c76b8abce575e0c6e4096957220b4515ed847d89", "status": "affected", "versionType": "git" }, { "version": "8ea636848aca35b9f97c5b5dee30225cf2dd0fe6", "lessThan": "a6f0643e4f63cfaa0d5d4a69de4f132eac4b8fe4", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/linux/bpf_lsm.h", "kernel/bpf/bpf_inode_storage.c", "security/bpf/hooks.c" ], "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.266", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.217", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.184", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "5.10", "versionEndExcluding": "5.10.266" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.217" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.1.184" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.1.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/413b14b9623a2e6ee131c2b2152b304aeb04e378" }, { "url": "https://git.kernel.org/stable/c/a6d634f794c808a261eac7d5af023a7e06b9ecd8" }, { "url": "https://git.kernel.org/stable/c/721f669853bdbf46b475a81bb5d05d610f8c19de" }, { "url": "https://git.kernel.org/stable/c/5337eebdf8c5d4810b1913047f078d2815d5645f" }, { "url": "https://git.kernel.org/stable/c/de984ea883405420fdc416ae8964b752df586970" }, { "url": "https://git.kernel.org/stable/c/267fdd9b6530c399dfd996e1a0a7628b45baf9f0" }, { "url": "https://git.kernel.org/stable/c/c76b8abce575e0c6e4096957220b4515ed847d89" }, { "url": "https://git.kernel.org/stable/c/a6f0643e4f63cfaa0d5d4a69de4f132eac4b8fe4" } ], "title": "bpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM is uninitialized", "x_generator": { "engine": "bippy-1.2.0" } } } }