In the Linux kernel, the following vulnerability has been resolved:
binder: fix yet another UAF in binder_devices
Commit e77aff5528a18 ("binderfs: fix use-after-free in binder_devices") addressed a use-after-free where devices could be released without first being removed from the binder_devices list. However, there is a similar path in binder_free_proc() that was missed:
================================================================== BUG: KASAN: slab-use-after-free in binder_remove_device+0xd4/0x100 Write of size 8 at addr ffff0000c773b900 by task umount/467 CPU: 12 UID: 0 PID: 467 Comm: umount Not tainted 6.15.0-rc7-00138-g57483a362741 #9 PREEMPT Hardware name: linux,dummy-virt (DT) Call trace: binder_remove_device+0xd4/0x100 binderfs_evict_inode+0x230/0x2f0 evict+0x25c/0x5dc iput+0x304/0x480 dentry_unlink_inode+0x208/0x46c __dentry_kill+0x154/0x530 [...]
Allocated by task 463: __kmalloc_cache_noprof+0x13c/0x324 binderfs_binder_device_create.isra.0+0x138/0xa60 binder_ctl_ioctl+0x1ac/0x230 [...]
Freed by task 215: kfree+0x184/0x31c binder_proc_dec_tmpref+0x33c/0x4ac binder_deferred_func+0xc10/0x1108 process_one_work+0x520/0xba4 [...] ==================================================================
Call binder_remove_device() within binder_free_proc() to ensure the device is removed from the binder_devices list before being kfreed.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Ubuntu | — | Upgrade linux-image-realtimeUpgrade linux-image-gcp-6.14Upgrade linux-image-gcp-64k-6.14Upgrade linux-image-6.14.0-1016-gcpUpgrade linux-image-aws-64kUpgrade linux-image-6.14.0-1012-realtimeUpgrade linux-image-oracle-64kUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oem-24.04cUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-raspiUpgrade linux-image-6.14.0-1013-awsUpgrade linux-image-generic-6.14Upgrade linux-image-oem-24.04Upgrade linux-image-6.14.0-1016-gcp-64kUpgrade linux-image-virtual-6.14Upgrade linux-image-aws-6.14Upgrade linux-image-aws-64k-6.14Upgrade linux-image-realtime-6.14Upgrade linux-image-generic-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oracle-64k-6.14Upgrade linux-image-azureUpgrade linux-image-gcp-64kUpgrade linux-image-6.14.0-1014-raspiUpgrade linux-image-gcpUpgrade linux-image-raspi-6.14Upgrade linux-image-6.14.0-1013-oracleUpgrade linux-image-oem-24.04aUpgrade linux-image-6.14.0-1013-aws-64kUpgrade linux-image-6.14.0-1013-oracle-64kUpgrade linux-image-6.14.0-1012-oemUpgrade linux-image-genericUpgrade linux-image-oem-24.04bUpgrade linux-image-6.14.0-1012-azureUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-awsUpgrade linux-image-6.14.0-32-genericUpgrade linux-image-oem-6.14Upgrade linux-image-azure-6.14Upgrade linux-image-oracle-6.14Upgrade linux-image-oracleUpgrade linux-image-generic-64k-6.14Upgrade linux-image-6.14.0-32-generic-64kUpgrade linux-image-virtual | Jul 9, 2025 | Jul 4, 2025 |
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