CVE-2026-64468binder: fix UAF in binder_free_transaction()
- 7.8HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 23 days later
· 23 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected a370003cc301d4361bae20c9ef615f89bf8d1e8a – < 5602a43f251c3d75312df91a422675fc00ca3dce
- affected a370003cc301d4361bae20c9ef615f89bf8d1e8a – < 0be901ab1dcc4af59b88f2e324493bb283850167
- affected a370003cc301d4361bae20c9ef615f89bf8d1e8a – < 48aeda9f8039e4a6971d1804578efde7f2c01eda
- affected a370003cc301d4361bae20c9ef615f89bf8d1e8a – < 45df558c543bb5543bacc8065fd7c567740781e5
- affected a370003cc301d4361bae20c9ef615f89bf8d1e8a – < d45ef513eed1abebfec90c3cfb6ae50c2a4182db
- affected a370003cc301d4361bae20c9ef615f89bf8d1e8a – < 328ccf32acb87e8bbb1fe2b065068c574e4db2bf
- affected a370003cc301d4361bae20c9ef615f89bf8d1e8a – < 0f15f0f6ca5df566275ce517f257af2559528b41
- affected a370003cc301d4361bae20c9ef615f89bf8d1e8a – < f223d27a546c1e1f48d38fd67760e78f068fe8c4
- affected a4a3c070b8760f71c8311399fa9bfe67c8629bca
- affected 22068d49d09d2b3890e19d7b2048a33340f992da
- affected 0e3b977a8f1be01dcfa0baae68851b1f55f2a0a9
- affected 4.14.136 – < 4.15
- affected 4.19.64 – < 4.20
- affected 5.1.15 – < 5.2
- affected 5.2
- unaffected < 5.2
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/5602a43f251c3d75312df91a422675fc00ca3dce (opens in a new tab)
- https://git.kernel.org/stable/c/0be901ab1dcc4af59b88f2e324493bb283850167 (opens in a new tab)
- https://git.kernel.org/stable/c/48aeda9f8039e4a6971d1804578efde7f2c01eda (opens in a new tab)
- https://git.kernel.org/stable/c/45df558c543bb5543bacc8065fd7c567740781e5 (opens in a new tab)
- https://git.kernel.org/stable/c/d45ef513eed1abebfec90c3cfb6ae50c2a4182db (opens in a new tab)
- https://git.kernel.org/stable/c/328ccf32acb87e8bbb1fe2b065068c574e4db2bf (opens in a new tab)
- https://git.kernel.org/stable/c/0f15f0f6ca5df566275ce517f257af2559528b41 (opens in a new tab)
- https://git.kernel.org/stable/c/f223d27a546c1e1f48d38fd67760e78f068fe8c4 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-48812 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64468)Record last updated .