{"cve":"CVE-2026-64469","nvd":{"published":"2026-07-25T10:17:32.247","modified":"2026-08-17T05:17:52.430","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix UAF in binder_thread_release()\n\nWhen a thread exits, binder_thread_release() walks its transaction stack\nto clear the t->from and t->to_proc that correspond with the exiting\nthread. However, a process dying in parallel might attempt to kfree some\nof these transactions. And if one of them has no associated t->to_proc,\nthe t->to_proc->inner_lock will not be acquired.\n\nThis means that transaction accesses in binder_thread_release() after\nt->to_proc has been cleared might race with binder_free_transaction()\nand cause a use-after-free error as reported by KASAN:\n\n  ==================================================================\n  BUG: KASAN: slab-use-after-free in binder_thread_release+0x5d0/0x798\n  Write of size 8 at addr ffff000016627500 by task X/715\n\n  CPU: 17 UID: 0 PID: 715 Comm: X Not tainted 7.1.0-rc5-00149-g8fde5d1d47f6 #30 PREEMPT\n  Hardware name: linux,dummy-virt (DT)\n  Call trace:\n   binder_thread_release+0x5d0/0x798\n   binder_ioctl+0x12c0/0x299c\n   [...]\n\n  Allocated by task 717 on cpu 18 at 67.267803s:\n   __kasan_kmalloc+0xa0/0xbc\n   __kmalloc_cache_noprof+0x174/0x444\n   binder_transaction+0x554/0x8150\n   binder_thread_write+0xa30/0x4354\n   binder_ioctl+0x20f0/0x299c\n   [...]\n\n  Freed by task 202 on cpu 18 at 90.416221s:\n   __kasan_slab_free+0x58/0x80\n   kfree+0x1a0/0x4a4\n   binder_free_transaction+0x150/0x294\n   binder_send_failed_reply+0x398/0x6d8\n   binder_release_work+0x3e4/0x4ec\n   binder_deferred_func+0xbd8/0x104c\n   [...]\n  ==================================================================\n\nIn order to avoid this, make sure that binder_free_transaction() reads\nthe t->to_proc under the transaction lock. This will serialize the\ntransaction release with the accesses in binder_thread_release(). Plus,\nit matches the documented locking rules for @to_proc.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":[],"references":["https://git.kernel.org/stable/c/114a116aaa5f0295376cdf12da743c5bce3b20ce","https://git.kernel.org/stable/c/1f96f8c0a6ed4f6d01d3dd29ad0cbf08dde96082","https://git.kernel.org/stable/c/38e1a71728e5795b670cc159c18e286a40aeebb4","https://git.kernel.org/stable/c/df1a17abba8d6fac5f965adcb8113ceace6e4949","https://git.kernel.org/stable/c/e63032dc715026a96bcaa13d375a8e15c91caa84"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:46:40.600842820+00:00"},"epss":{"cve":"CVE-2026-64469","score":0.00135,"percentile":0.02966,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}