# CVE-2026-64468: linux: In the Linux kernel, the following vulnerability has been resolved:  binder: fix UAF in binder_free_transaction()  In...

CVE-2026-64468 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-64468, released July 26, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-64468
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 25, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  binder: fix UAF in binder_free_transaction()  In binder_free_transaction(), the t->to_proc is read under the t->lock. However, once the t->lock is dropped, the to_proc can die in parallel. This leads to a use-after-free error when we attempt to acquire its inner lock right afterwards:    ==================================================================   BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x1a0   Write of size 4 at addr ffff00001125da70 by task B/672    CPU: 20 UID: 0 PID: 672 Comm: B Not tainted 7.1.0-rc6-00284-g8e65320d91cd #4 PREEMPT   Hardware name: linux,dummy-virt (DT)   Call trace:    _raw_spin_lock+0xe4/0x1a0    binder_free_transaction+0x8c/0x320    binder_send_failed_reply+0x21c/0x2f8    binder_thread_release+0x488/0x7e0    binder_ioctl+0x12c0/0x29a0   [...]    Allocated by task 675:    __kmalloc_cache_noprof+0x174/0x444    binder_open+0x118/0xb70    do_dentry_open+0x374/0x1040    vfs_open+0x58/0x3bc   [...]    Freed by task 212:    __kasan_slab_free+0x58/0x80    kfree+0x1a0/0x4a4    binder_proc_dec_tmpref+0x32c/0x5e0    binder_deferred_func+0xc48/0x104c    process_one_work+0x53c/0xbc0   [...]   ==================================================================  To prevent this, pin the target thread (t->to_thread) to guarantee the target process remains alive. Undelivered transactions without a target thread are already safe, as the target process can only be the current context in those paths.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.180-1 | [DEBIAN-CVE-2026-64468](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64468.md) | Jul 26, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.96-1 | [DEBIAN-CVE-2026-64468](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64468.md) | Jul 26, 2026 |
| Linux | linux Debian 14 | 7.1.4-1 | [DEBIAN-CVE-2026-64468](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64468.md) | Jul 26, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.100-1~deb12u1 | [DEBIAN-CVE-2026-64468](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64468.md) | Jul 26, 2026 |

---

Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.