{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38175", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.992Z", "datePublished": "2025-07-04T10:39:56.392Z", "dateUpdated": "2026-08-05T12:00:06.352Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:00:06.352Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix yet another UAF in binder_devices\n\nCommit e77aff5528a18 (\"binderfs: fix use-after-free in binder_devices\")\naddressed a use-after-free where devices could be released without first\nbeing removed from the binder_devices list. However, there is a similar\npath in binder_free_proc() that was missed:\n\n ==================================================================\n BUG: KASAN: slab-use-after-free in binder_remove_device+0xd4/0x100\n Write of size 8 at addr ffff0000c773b900 by task umount/467\n CPU: 12 UID: 0 PID: 467 Comm: umount Not tainted 6.15.0-rc7-00138-g57483a362741 #9 PREEMPT\n Hardware name: linux,dummy-virt (DT)\n Call trace:\n binder_remove_device+0xd4/0x100\n binderfs_evict_inode+0x230/0x2f0\n evict+0x25c/0x5dc\n iput+0x304/0x480\n dentry_unlink_inode+0x208/0x46c\n __dentry_kill+0x154/0x530\n [...]\n\n Allocated by task 463:\n __kmalloc_cache_noprof+0x13c/0x324\n binderfs_binder_device_create.isra.0+0x138/0xa60\n binder_ctl_ioctl+0x1ac/0x230\n [...]\n\n Freed by task 215:\n kfree+0x184/0x31c\n binder_proc_dec_tmpref+0x33c/0x4ac\n binder_deferred_func+0xc10/0x1108\n process_one_work+0x520/0xba4\n [...]\n ==================================================================\n\nCall binder_remove_device() within binder_free_proc() to ensure the\ndevice is removed from the binder_devices list before being kfreed." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is reached through local operations only — mounting binderfs, the BINDER_CTL_ADD ioctl, opening binder device files, and process teardown. There is no network component.\nAC:L - The attacker fully controls both sides of the lifetime ordering (proc references via open/close and inode eviction via umount), and the bug is reliably reproducible (syzbot Tested-by), so no condition is beyond attacker control.\nPR:L - binderfs is an FS_USERNS_MOUNT filesystem, so an unprivileged user can mount it in a user namespace and drive the binder-control ioctl and device opens without real privileges; on Android, ordinary apps have binder access directly.\nUI:N - The attacker performs all steps (create device, open, trigger release and eviction) entirely on their own; no action from any other user is required.\nS:U - The use-after-free is contained within the kernel's own memory and security authority; it does not cross into a separate security scope such as a VM host or IOMMU boundary.\nC:H - A use-after-free on a re-allocatable heap object lets the attacker place controlled data in the freed slot and read back kernel memory contents, enabling information disclosure.\nI:H - The freed binder_device is written through hlist_del_init after reallocation, giving a write primitive on attacker-controlled heap contents that can be leveraged for further memory corruption and control-flow hijacking.\nA:H - The use-after-free corrupts kernel heap state and reliably triggers a KASAN-detected slab-use-after-free / oops, crashing the kernel." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/android/binder.c" ], "versions": [ { "version": "12d909cac1e1c4147cc3417fee804ee12fc6b984", "lessThan": "4a7694f499cae5b83412c5281bf2c961f34f2ed6", "status": "affected", "versionType": "git" }, { "version": "12d909cac1e1c4147cc3417fee804ee12fc6b984", "lessThan": "72a726fb5f25fbb31d6060acfb671c1955831245", "status": "affected", "versionType": "git" }, { "version": "12d909cac1e1c4147cc3417fee804ee12fc6b984", "lessThan": "9857af0fcff385c75433f2162c30c62eb912ef6d", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/android/binder.c" ], "versions": [ { "version": "6.14", "status": "affected" }, { "version": "0", "lessThan": "6.14", "status": "unaffected", "versionType": "semver" }, { "version": "6.14.11", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.2", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.14.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.15.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14", "versionEndExcluding": "6.16" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/4a7694f499cae5b83412c5281bf2c961f34f2ed6" }, { "url": "https://git.kernel.org/stable/c/72a726fb5f25fbb31d6060acfb671c1955831245" }, { "url": "https://git.kernel.org/stable/c/9857af0fcff385c75433f2162c30c62eb912ef6d" } ], "title": "binder: fix yet another UAF in binder_devices", "x_generator": { "engine": "bippy-1.2.0" } } } }