{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64468", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.790Z", "datePublished": "2026-07-25T08:51:33.364Z", "dateUpdated": "2026-08-17T04:56:13.826Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:56:13.826Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix UAF in binder_free_transaction()\n\nIn binder_free_transaction(), the t->to_proc is read under the t->lock.\nHowever, once the t->lock is dropped, the to_proc can die in parallel.\nThis leads to a use-after-free error when we attempt to acquire its\ninner lock right afterwards:\n\n ==================================================================\n BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x1a0\n Write of size 4 at addr ffff00001125da70 by task B/672\n\n CPU: 20 UID: 0 PID: 672 Comm: B Not tainted 7.1.0-rc6-00284-g8e65320d91cd #4 PREEMPT\n Hardware name: linux,dummy-virt (DT)\n Call trace:\n _raw_spin_lock+0xe4/0x1a0\n binder_free_transaction+0x8c/0x320\n binder_send_failed_reply+0x21c/0x2f8\n binder_thread_release+0x488/0x7e0\n binder_ioctl+0x12c0/0x29a0\n [...]\n\n Allocated by task 675:\n __kmalloc_cache_noprof+0x174/0x444\n binder_open+0x118/0xb70\n do_dentry_open+0x374/0x1040\n vfs_open+0x58/0x3bc\n [...]\n\n Freed by task 212:\n __kasan_slab_free+0x58/0x80\n kfree+0x1a0/0x4a4\n binder_proc_dec_tmpref+0x32c/0x5e0\n binder_deferred_func+0xc48/0x104c\n process_one_work+0x53c/0xbc0\n [...]\n ==================================================================\n\nTo prevent this, pin the target thread (t->to_thread) to guarantee the\ntarget process remains alive. Undelivered transactions without a target\nthread are already safe, as the target process can only be the current\ncontext in those paths." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is reached through Binder device ioctls, including BINDER_WRITE_READ and BINDER_THREAD_EXIT, so the attacker requires local execution.\nAC:L - Attacker-controlled processes can construct the transaction stack and concurrently trigger both thread and target-process teardown, allowing repeated race attempts and heap spraying.\nPR:L - A basic unprivileged user can access an available Binder device or mount a private BinderFS instance through a user namespace; no capability in the initial user namespace is required.\nUI:N - All required transactions, thread exits, and process teardown can be performed by attacker-controlled processes without victim action.\nS:U - Exploitation affects the host kernel within its existing security authority, making this a standard local kernel privilege escalation with unchanged scope.\nC:H - The freed binder_proc can be reclaimed with attacker-influenced data, and subsequent stale-pointer dereferences can provide kernel-memory access and disclosure primitives.\nI:H - The UAF performs spinlock and counter writes into freed slab memory and may operate on a reclaimed waitqueue, enabling heap corruption and potential arbitrary kernel code execution.\nA:H - The demonstrated invalid spinlock write causes a KASAN UAF, and exploitation can otherwise produce a kernel crash, panic, or hang." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/android/binder.c" ], "versions": [ { "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a", "lessThan": "5602a43f251c3d75312df91a422675fc00ca3dce", "status": "affected", "versionType": "git" }, { "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a", "lessThan": "0be901ab1dcc4af59b88f2e324493bb283850167", "status": "affected", "versionType": "git" }, { "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a", "lessThan": "48aeda9f8039e4a6971d1804578efde7f2c01eda", "status": "affected", "versionType": "git" }, { "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a", "lessThan": "45df558c543bb5543bacc8065fd7c567740781e5", "status": "affected", "versionType": "git" }, { "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a", "lessThan": "d45ef513eed1abebfec90c3cfb6ae50c2a4182db", "status": "affected", "versionType": "git" }, { "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a", "lessThan": "328ccf32acb87e8bbb1fe2b065068c574e4db2bf", "status": "affected", "versionType": "git" }, { "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a", "lessThan": "0f15f0f6ca5df566275ce517f257af2559528b41", "status": "affected", "versionType": "git" }, { "version": "a370003cc301d4361bae20c9ef615f89bf8d1e8a", "lessThan": "f223d27a546c1e1f48d38fd67760e78f068fe8c4", "status": "affected", "versionType": "git" }, { "version": "a4a3c070b8760f71c8311399fa9bfe67c8629bca", "status": "affected", "versionType": "git" }, { "version": "22068d49d09d2b3890e19d7b2048a33340f992da", "status": "affected", "versionType": "git" }, { "version": "0e3b977a8f1be01dcfa0baae68851b1f55f2a0a9", "status": "affected", "versionType": "git" }, { "version": "4.14.136", "lessThan": "4.15", "status": "affected", "versionType": "semver" }, { "version": "4.19.64", "lessThan": "4.20", "status": "affected", "versionType": "semver" }, { "version": "5.1.15", "lessThan": "5.2", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/android/binder.c" ], "versions": [ { "version": "5.2", "status": "affected" }, { "version": "0", "lessThan": "5.2", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.96", "lessThanOrEqual": "6.12.*", "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", "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": "5.2", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.12.96" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.18.39" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "7.1.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "7.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.136" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.64" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.1.15" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/5602a43f251c3d75312df91a422675fc00ca3dce" }, { "url": "https://git.kernel.org/stable/c/0be901ab1dcc4af59b88f2e324493bb283850167" }, { "url": "https://git.kernel.org/stable/c/48aeda9f8039e4a6971d1804578efde7f2c01eda" }, { "url": "https://git.kernel.org/stable/c/45df558c543bb5543bacc8065fd7c567740781e5" }, { "url": "https://git.kernel.org/stable/c/d45ef513eed1abebfec90c3cfb6ae50c2a4182db" }, { "url": "https://git.kernel.org/stable/c/328ccf32acb87e8bbb1fe2b065068c574e4db2bf" }, { "url": "https://git.kernel.org/stable/c/0f15f0f6ca5df566275ce517f257af2559528b41" }, { "url": "https://git.kernel.org/stable/c/f223d27a546c1e1f48d38fd67760e78f068fe8c4" } ], "title": "binder: fix UAF in binder_free_transaction()", "x_generator": { "engine": "bippy-1.2.0" } } } }