{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-56556", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T14:03:05.991Z", "datePublished": "2024-12-27T14:23:02.556Z", "dateUpdated": "2026-08-05T11:45:03.890Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:45:03.890Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix node UAF in binder_add_freeze_work()\n\nIn binder_add_freeze_work() we iterate over the proc->nodes with the\nproc->inner_lock held. However, this lock is temporarily dropped in\norder to acquire the node->lock first (lock nesting order). This can\nrace with binder_node_release() and trigger a use-after-free:\n\n ==================================================================\n BUG: KASAN: slab-use-after-free in _raw_spin_lock+0xe4/0x19c\n Write of size 4 at addr ffff53c04c29dd04 by task freeze/640\n\n CPU: 5 UID: 0 PID: 640 Comm: freeze Not tainted 6.11.0-07343-ga727812a8d45 #17\n Hardware name: linux,dummy-virt (DT)\n Call trace:\n _raw_spin_lock+0xe4/0x19c\n binder_add_freeze_work+0x148/0x478\n binder_ioctl+0x1e70/0x25ac\n __arm64_sys_ioctl+0x124/0x190\n\n Allocated by task 637:\n __kmalloc_cache_noprof+0x12c/0x27c\n binder_new_node+0x50/0x700\n binder_transaction+0x35ac/0x6f74\n binder_thread_write+0xfb8/0x42a0\n binder_ioctl+0x18f0/0x25ac\n __arm64_sys_ioctl+0x124/0x190\n\n Freed by task 637:\n kfree+0xf0/0x330\n binder_thread_read+0x1e88/0x3a68\n binder_ioctl+0x16d8/0x25ac\n __arm64_sys_ioctl+0x124/0x190\n ==================================================================\n\nFix the race by taking a temporary reference on the node before\nreleasing the proc->inner lock. This ensures the node remains alive\nwhile in use." } ], "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 only through the BINDER_FREEZE ioctl on a local binder device file (/dev/binder or binderfs); it is a local IPC driver with no network exposure.\nAC:L - This is a race the attacker fully controls — one thread issues BINDER_FREEZE while other attacker threads free the target node in the unlocked window; it is retryable and sprayable so success is reliable.\nPR:L - BINDER_FREEZE has no capability check; any unprivileged local process with an open binder fd (e.g. any Android app) can reach the code, requiring only basic user access.\nUI:N - The attacker triggers both the freeze operation and the racing node free entirely from its own threads/processes with no victim action required.\nS:U - The use-after-free corrupts kernel slab memory within the kernel's own security authority; there is no crossing of a VM/IOMMU boundary.\nC:H - A use-after-free on the binder_node object lets the attacker reallocate and control the freed slab contents, enabling arbitrary kernel memory disclosure.\nI:H - The UAF provides a write into freed memory that, via heap spraying, yields an arbitrary-write primitive suitable for control-flow hijacking and privilege escalation.\nA:H - The use-after-free reliably corrupts kernel memory and causes kernel panic/oops, resulting in full loss of availability." } ] } ], "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": "d579b04a52a183db47dfcb7a44304d7747d551e1", "lessThan": "38fbefeb2c140b581ed7de8117a5c90d6dd89c22", "status": "affected", "versionType": "git" }, { "version": "d579b04a52a183db47dfcb7a44304d7747d551e1", "lessThan": "dc8aea47b928cc153b591b3558829ce42f685074", "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": "6.12", "status": "affected" }, { "version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.4", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "6.12", "versionEndExcluding": "6.12.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/38fbefeb2c140b581ed7de8117a5c90d6dd89c22" }, { "url": "https://git.kernel.org/stable/c/dc8aea47b928cc153b591b3558829ce42f685074" } ], "title": "binder: fix node UAF in binder_add_freeze_work()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-56556", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-10T17:12:44.371493Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-10T17:21:08.457Z" } } ] } }