159 lines
8.8 KiB
JSON
159 lines
8.8 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-64467",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-07-19T15:36:31.790Z",
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"datePublished": "2026-07-25T08:51:32.626Z",
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"dateUpdated": "2026-08-17T04:56:12.747Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-17T04:56:12.747Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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!"
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
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"baseScore": 8.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable path is reached through a local BINDER_WRITE_READ ioctl carrying a crafted Binder transaction.\nAC:L - The attacker controls object zero and the offsets count and can force synchronous cleanup with a later invalid object; no race or uncontrollable condition is required.\nPR:L - An ordinary process permitted to access the Binder device and invoke and transfer objects to the target can trigger the bug; no capability or administrative privilege is required.\nUI:N - A malformed later object makes transaction construction fail and invokes cleanup during the attacker's ioctl, without recipient or human action.\nS:C - Prematurely releasing an object owned by a more privileged Binder service can create a user-space use-after-free across the Android application sandbox boundary.\nC:H - The attacker can retain a handle after BR_RELEASE frees the owning service's object, then target the stale pointer and potentially obtain code execution and arbitrary access to privileged-process memory.\nI:H - Exploitation of the resulting stale Binder object can provide attacker-controlled code execution and arbitrary modification within the privileged owning service.\nA:H - Stale-object dispatch can crash a critical Binder service, and the trigger can be repeated to cause persistent service or system disruption."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/android/binder/allocation.rs"
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],
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"versions": [
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{
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"version": "eafedbc7c050c44744fbdf80bdf3315e860b7513",
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"lessThan": "89b8cc948dce661af87527623b3a41cdd115e2f9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "eafedbc7c050c44744fbdf80bdf3315e860b7513",
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"lessThan": "74920b1b4e474ba7a4de4323c0458deec49d210b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "eafedbc7c050c44744fbdf80bdf3315e860b7513",
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"lessThan": "803c8a9502e9b97cd6ae937618ef4a8fd6274343",
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"status": "affected",
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/android/binder/allocation.rs"
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],
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"versions": [
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{
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"version": "6.18",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.18",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.39",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.4",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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"negate": false,
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.18",
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"versionEndExcluding": "6.18.39"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.18",
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"versionEndExcluding": "7.1.4"
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.18",
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}
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/89b8cc948dce661af87527623b3a41cdd115e2f9"
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},
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{
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"url": "https://git.kernel.org/stable/c/74920b1b4e474ba7a4de4323c0458deec49d210b"
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},
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{
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"url": "https://git.kernel.org/stable/c/803c8a9502e9b97cd6ae937618ef4a8fd6274343"
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}
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],
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"title": "rust_binder: use a u64 stride when cleaning up the offsets array",
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"x_generator": {
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"engine": "bippy-1.2.0"
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} |