{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-56555", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T14:03:05.990Z", "datePublished": "2024-12-27T14:23:01.650Z", "dateUpdated": "2026-08-05T11:45:02.793Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:45:02.793Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbinder: fix OOB 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 to\nacquire the node->lock first (lock nesting order). This can race with\nbinder_deferred_release() which removes the nodes from the proc->nodes\nrbtree and adds them into binder_dead_nodes list. This leads to a broken\niteration in binder_add_freeze_work() as rb_next() will use data from\nbinder_dead_nodes, triggering an out-of-bounds access:\n\n ==================================================================\n BUG: KASAN: global-out-of-bounds in rb_next+0xfc/0x124\n Read of size 8 at addr ffffcb84285f7170 by task freeze/660\n\n CPU: 8 UID: 0 PID: 660 Comm: freeze Not tainted 6.11.0-07343-ga727812a8d45 #18\n Hardware name: linux,dummy-virt (DT)\n Call trace:\n rb_next+0xfc/0x124\n binder_add_freeze_work+0x344/0x534\n binder_ioctl+0x1e70/0x25ac\n __arm64_sys_ioctl+0x124/0x190\n\n The buggy address belongs to the variable:\n binder_dead_nodes+0x10/0x40\n [...]\n ==================================================================\n\nThis is possible because proc->nodes (rbtree) and binder_dead_nodes\n(list) share entries in binder_node through a union:\n\n\tstruct binder_node {\n\t[...]\n\t\tunion {\n\t\t\tstruct rb_node rb_node;\n\t\t\tstruct hlist_node dead_node;\n\t\t};\n\nFix the race by checking that the proc is still alive. If not, simply\nbreak out of the iteration." } ], "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 an open /dev/binder (or binderfs) file descriptor, which requires local access to the system. There is no network or adjacent-network path to binder IPC.\nAC:L - Although this is a race between binder_add_freeze_work() and binder_deferred_release(), the attacker controls both sides — it creates the victim binder proc, has a peer process hold refs on its nodes, closes the fd to trigger deferred release, and simultaneously loops BINDER_FREEZE on that pid from another thread. The race can be retried indefinitely with no attacker-uncontrollable precondition.\nPR:L - No capability check, uid check, or LSM hook exists on the BINDER_FREEZE path; any process that can open the binder device can freeze any pid found in the global binder_procs list. On Android /dev/binder is world-accessible to every untrusted app, and on desktop/ChromeOS deployments with the binder module (waydroid/anbox/ARC) binderfs is reachable by ordinary users.\nUI:N - Exploitation is driven entirely by the attacker's own processes issuing ioctls and closing file descriptors. No victim action of any kind is needed.\nS:U - The corruption occurs in kernel memory and yields kernel-privilege escalation within the same security authority. No VM, IOMMU, or hypervisor boundary is crossed.\nC:H - The broken iteration reads out of bounds past the global binder_dead_nodes into adjacent kernel globals (binder_debugfs_dir_entry_root), then chases those kernel pointers through arbitrary objects, disclosing and acting on kernel memory contents and defeating KASLR. This is an unbounded pointer-chasing read, not a small bounded leak.\nI:H - The out-of-bounds result is rb_entry()'d into a struct binder_node * and then written through — tmp_refs increment, spin_lock acquisition, ref->freeze->work.type assignment, and list_add() into ref->proc->todo, plus a refcount decrement via binder_put_node(). This type confusion supplies wild-write primitives on attacker-groomable kernel memory, suitable for control-flow hijacking.\nA:H - In practice the iteration dereferences garbage pointers and takes spinlocks on non-lock memory, producing an immediate KASAN-reported oops, panic, or deadlock. The condition is trivially and repeatedly triggerable by an unprivileged local process." } ] } ], "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": "6b1be1da1f8279cf091266e71b5153c5b02aaff6", "status": "affected", "versionType": "git" }, { "version": "d579b04a52a183db47dfcb7a44304d7747d551e1", "lessThan": "011e69a1b23011c0db3af4b8293fdd4522cc97b0", "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/6b1be1da1f8279cf091266e71b5153c5b02aaff6" }, { "url": "https://git.kernel.org/stable/c/011e69a1b23011c0db3af4b8293fdd4522cc97b0" } ], "title": "binder: fix OOB in binder_add_freeze_work()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-56555", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:02:16.414215Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:07:16.206Z" } } ] } }