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-2026-64080",
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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": "2026-07-19T07:54:57.031Z",
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"datePublished": "2026-07-19T15:39:52.818Z",
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"dateUpdated": "2026-08-05T12:38:59.719Z"
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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": "2026-08-05T12:38:59.719Z"
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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\nfirmware: arm_ffa: Snapshot notifier callbacks under lock\n\nBoth notification handlers currently look up a notifier callback under\nnotify_lock, drop the lock, and then dereference the returned\nnotifier entry. A concurrent unregister can delete and free that\nentry in the gap, leaving the handler to dereference stale memory.\n\nCopy the callback pointer and callback data while notify_lock is\nstill held and invoke the callback only after the lock is dropped.\nThis keeps the existing callback execution model while removing the\nuse-after-free window in both the framework and non-framework\nnotification paths."
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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:N/UI:N/S:C/C:H/I:H/A:H",
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"baseScore": 9.3,
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"baseSeverity": "CRITICAL"
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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 bug is reached through the Arm FF-A firmware notification IRQ/workqueue path (SMC/secure-partition notifications), not through any network protocol. Attackers reach it locally via secure-world FF-A traffic or TEE ioctl access on ARM64 TrustZone systems.\nAC:L - This is a race where the attacker can flood FF-A notifications from secure world (or via concurrent TEE sessions) while driver teardown unregisters the callback; both sides of the race are attacker-influenceable on systems with OP-TEE async notifications enabled.\nPR:N - A malicious secure-world partition can send FF-A notifications without any normal-world Linux credentials; the concurrent unregister side is reached automatically during kernel/driver teardown (reboot, shutdown, module unload) without requiring attacker privileges.\nUI:N - Exploitation requires no victim interaction beyond normal system operation; a malicious secure-world component or automated teardown events (scheduled reboot, OTA, shutdown) can trigger the race without the user performing any action.\nS:C - On Arm TrustZone deployments, a malicious secure-world partition can corrupt normal-world kernel memory across the secure/normal-world security boundary, escalating impact beyond the FF-A driver's own authority into full kernel compromise.\nC:H - The UAF dereferences a freed kmalloc notifier entry containing callback metadata; stale heap contents can be read and leveraged for kernel memory disclosure consistent with UAF guidance.\nI:H - After the UAF, the handler invokes a function pointer read from freed memory (cb_info->cb/fwk_cb), enabling control-flow hijack and arbitrary kernel code execution via heap grooming.\nA:H - The UAF can cause immediate kernel oops/panic from dereferencing freed memory or invoking a corrupted function pointer, satisfying kernel crash guidance for UAF bugs."
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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/firmware/arm_ffa/driver.c"
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],
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"versions": [
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{
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"version": "285a5ea0f542db94c3ed11e01a71abb47d15cbf5",
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"lessThan": "d1e38551fadea230649bc428f0f35c9ee062a072",
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"status": "affected",
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"versionType": "git"
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"lessThan": "0e7be42ef2490f19d859a6146324d48cafdc9d5c",
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"status": "affected",
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"status": "affected",
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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/firmware/arm_ffa/driver.c"
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],
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"versions": [
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{
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"version": "6.15",
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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": "6.15",
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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": "6.18.34",
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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": "7.0.11",
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"lessThanOrEqual": "7.0.*",
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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",
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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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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.15",
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"versionEndExcluding": "6.18.34"
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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": "6.15",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/d1e38551fadea230649bc428f0f35c9ee062a072"
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},
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{
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"url": "https://git.kernel.org/stable/c/0e7be42ef2490f19d859a6146324d48cafdc9d5c"
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},
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{
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"url": "https://git.kernel.org/stable/c/38290b180a4d5746baed796d49f88d56d2f336cd"
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}
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],
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"title": "firmware: arm_ffa: Snapshot notifier callbacks under lock",
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