{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64467", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.790Z", "datePublished": "2026-07-25T08:51:32.626Z", "dateUpdated": "2026-07-25T08:51:32.626Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:51:32.626Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrust_binder: use a u64 stride when cleaning up the offsets array\n\nAllocation's Drop walks the offsets array (binder_size_t = u64 entries),\ncleaning up the objects, but it used usize instead of u64 for both the\nstride and the per-entry read.\n\nOn 64-bit kernels (usize == u64) this is harmless, but on 32-bit kernels\nit walks the 8-byte entries in 4-byte steps, iterating an N-entry array\n2N times, and reads the always-zero high word as offset 0, cleaning up\nthe object at offset 0 N extra times. As a result the referenced node or\nhandle ends up with a lower reference count than it actually has (a\nrefcount over-decrement), and binder's reference accounting is corrupted;\nfor example, the owner can be notified of a strong reference release\n(BR_RELEASE) even though references still remain.\n\nChange the stride to u64, and read each entry as a u64, narrowing it to\nusize with try_into().\n\nOn 32-bit ARM, when this over-decrement would drive a count below zero,\nthe driver's existing refcount guard refuses it and fires:\n\n rust_binder: Failure: refcount underflow!"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/android/binder/allocation.rs"], "versions": [{"version": "eafedbc7c050c44744fbdf80bdf3315e860b7513", "lessThan": "89b8cc948dce661af87527623b3a41cdd115e2f9", "status": "affected", "versionType": "git"}, {"version": "eafedbc7c050c44744fbdf80bdf3315e860b7513", "lessThan": "74920b1b4e474ba7a4de4323c0458deec49d210b", "status": "affected", "versionType": "git"}, {"version": "eafedbc7c050c44744fbdf80bdf3315e860b7513", "lessThan": "803c8a9502e9b97cd6ae937618ef4a8fd6274343", "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/android/binder/allocation.rs"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc3", "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": "6.18", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.2-rc3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/89b8cc948dce661af87527623b3a41cdd115e2f9"}, {"url": "https://git.kernel.org/stable/c/74920b1b4e474ba7a4de4323c0458deec49d210b"}, {"url": "https://git.kernel.org/stable/c/803c8a9502e9b97cd6ae937618ef4a8fd6274343"}], "title": "rust_binder: use a u64 stride when cleaning up the offsets array", "x_generator": {"engine": "bippy-1.2.0"}}}}

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