CVE-2026-64469binder: fix UAF in binder_thread_release()
- 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_thread_release() When a thread exits, binder_thread_release() walks its transaction stack to clear the t->from and t->to_proc that correspond with the exiting thread. However, a process dying in parallel might attempt to kfree some of these transactions. And if one of them has no associated t->to_proc, the t->to_proc->inner_lock will not be acquired. This means that transaction accesses in binder_thread_release() after t->to_proc has been cleared might race with binder_free_transaction() and cause a use-after-free error as reported by KASAN: ================================================================== BUG: KASAN: slab-use-after-free in binder_thread_release+0x5d0/0x798 Write of size 8 at addr ffff000016627500 by task X/715 CPU: 17 UID: 0 PID: 715 Comm: X Not tainted 7.1.0-rc5-00149-g8fde5d1d47f6 #30 PREEMPT Hardware name: linux,dummy-virt (DT) Call trace: binder_thread_release+0x5d0/0x798 binder_ioctl+0x12c0/0x299c [...] Allocated by task 717 on cpu 18 at 67.267803s: __kasan_kmalloc+0xa0/0xbc __kmalloc_cache_noprof+0x174/0x444 binder_transaction+0x554/0x8150 binder_thread_write+0xa30/0x4354 binder_ioctl+0x20f0/0x299c [...] Freed by task 202 on cpu 18 at 90.416221s: __kasan_slab_free+0x58/0x80 kfree+0x1a0/0x4a4 binder_free_transaction+0x150/0x294 binder_send_failed_reply+0x398/0x6d8 binder_release_work+0x3e4/0x4ec binder_deferred_func+0xbd8/0x104c [...] ================================================================== In order to avoid this, make sure that binder_free_transaction() reads the t->to_proc under the transaction lock. This will serialize the transaction release with the accesses in binder_thread_release(). Plus, it matches the documented locking rules for @to_proc.
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 7a4408c6bd3eb1dafba67986259191be081e3efb – < 1f96f8c0a6ed4f6d01d3dd29ad0cbf08dde96082
- affected 7a4408c6bd3eb1dafba67986259191be081e3efb – < df1a17abba8d6fac5f965adcb8113ceace6e4949
- affected 7a4408c6bd3eb1dafba67986259191be081e3efb – < 38e1a71728e5795b670cc159c18e286a40aeebb4
- affected 7a4408c6bd3eb1dafba67986259191be081e3efb – < faa070c7ad8ba25dcd0b12d7cdbb419e336f5391
- affected 7a4408c6bd3eb1dafba67986259191be081e3efb – < e63032dc715026a96bcaa13d375a8e15c91caa84
- affected 7a4408c6bd3eb1dafba67986259191be081e3efb – < ea02df466df60ecd758eb3b4df3f0cadc5c886ce
- affected 7a4408c6bd3eb1dafba67986259191be081e3efb – < ef5439ba5b9ac93349f5df12ef88b42a0ce26340
- affected 7a4408c6bd3eb1dafba67986259191be081e3efb – < 114a116aaa5f0295376cdf12da743c5bce3b20ce
- affected 4.14
- unaffected < 4.14
- 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/1f96f8c0a6ed4f6d01d3dd29ad0cbf08dde96082 (opens in a new tab)
- https://git.kernel.org/stable/c/df1a17abba8d6fac5f965adcb8113ceace6e4949 (opens in a new tab)
- https://git.kernel.org/stable/c/38e1a71728e5795b670cc159c18e286a40aeebb4 (opens in a new tab)
- https://git.kernel.org/stable/c/faa070c7ad8ba25dcd0b12d7cdbb419e336f5391 (opens in a new tab)
- https://git.kernel.org/stable/c/e63032dc715026a96bcaa13d375a8e15c91caa84 (opens in a new tab)
- https://git.kernel.org/stable/c/ea02df466df60ecd758eb3b4df3f0cadc5c886ce (opens in a new tab)
- https://git.kernel.org/stable/c/ef5439ba5b9ac93349f5df12ef88b42a0ce26340 (opens in a new tab)
- https://git.kernel.org/stable/c/114a116aaa5f0295376cdf12da743c5bce3b20ce (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-2026-48813 (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-2026-64469)Record last updated .