{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-98776 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-98776 is an use after free vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-98776 and fix it if it is affected.\n\nWhat it is: CVE-2026-98776 is an use after free vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-98776 in the wild and no public exploit code.\n\nAffected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-98776/ (Markdown: https://insights.sbomify.com/CVE-2026-98776/index.md)","id":"CVE-2026-98776","markdown":"https://insights.sbomify.com/CVE-2026-98776/index.md","name":"CVE-2026-98776","record":{"aliases":["DEBIAN-CVE-2026-98776","GHSA-72x3-g5cv-hfvj","UBUNTU-CVE-2026-98776"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel binderfs allows local attackers to achieve code execution or privilege escalation via race conditions.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbinderfs: fix UAF write in binder_add_device\n\nbinderfs_binder_device_create() publishes the new dentry with\nd_make_persistent() and then calls simple_done_creating(), which drops\nthe parent directory lock and the creator's dentry reference. It then\ncalls binder_add_device() to register the device in the global\nbinder_devices list.\n\nAfter simple_done_creating() releases the parent directory lock, a\nconcurrent unlinkat() can remove the new device entry. Dropping the\ncreator's dentry reference can then trigger binderfs_evict_inode(),\nfreeing the device. binder_add_device() later accesses the freed\nobject, causing UAF write.\n\nFound by a modified Syzkaller:\n\n\tBUG: KASAN: slab-use-after-free in hlist_add_head include/linux/list.h:1073 [inline]\n\tBUG: KASAN: slab-use-after-free in binder_add_device+0xa9/0xc0 drivers/android/binder.c:7068\n\tWrite of size 8 at addr ffff88805b340c00 by task syz.1.532/11389\n\n\tCPU: 0 UID: 0 PID: 11389 Comm: syz.1.532 Not tainted 7.2.0 #4 PREEMPT(full)\n\tHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n\tCall Trace:\n\t\u003cTASK\u003e\n\t__dump_stack lib/dump_stack.c:94 [inline]\n\tdump_stack_lvl+0x10e/0x1f0 lib/dump_stack.c:120\n\tprint_address_description mm/kasan/report.c:378 [inline]\n\tprint_report+0xf7/0x600 mm/kasan/report.c:482\n\tkasan_report+0xe4/0x120 mm/kasan/report.c:595\n\thlist_add_head include/linux/list.h:1073 [inline]\n\tbinder_add_device+0xa9/0xc0 drivers/android/binder.c:7068\n\tbinderfs_binder_device_create.isra.0+0x724/0x990 drivers/android/binderfs.c:196\n\tbinder_ctl_ioctl+0x186/0x1b0 drivers/android/binderfs.c:241\n\tvfs_ioctl fs/ioctl.c:51 [inline]\n\t__do_sys_ioctl fs/ioctl.c:597 [inline]\n\t__se_sys_ioctl fs/ioctl.c:583 [inline]\n\t__x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583\n\tdo_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n\tdo_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94\n\tentry_SYSCALL_64_after_hwframe+0x77/0x7f\n\tRIP: 0033:0x7ff9027a833d\n\tCode: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48\n\tRSP: 002b:00007ff903674018 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n\tRAX: ffffffffffffffda RBX: 00007ff902a35fa0 RCX: 00007ff9027a833d\n\tRDX: 0000200000000500 RSI: 00000000c1086201 RDI: 0000000000000004\n\tRBP: 00007ff902850733 R08: 0000000000000000 R09: 0000000000000000\n\tR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n\tR13: 00007ff902a36038 R14: 00007ff902a35fa0 R15: 00007ffd7166bfa0\n\t\u003c/TASK\u003e\n\n\tAllocated by task 11389:\n\tkasan_save_stack+0x33/0x60 mm/kasan/common.c:57\n\tkasan_save_track+0x14/0x30 mm/kasan/common.c:78\n\tpoison_kmalloc_redzone mm/kasan/common.c:398 [inline]\n\t__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:415\n\tkasan_kmalloc include/linux/kasan.h:263 [inline]\n\t__kmalloc_cache_noprof+0x2e4/0x6f0 mm/slub.c:5489\n\t_kmalloc_noprof include/linux/slab.h:988 [inline]\n\t_kzalloc_noprof include/linux/slab.h:1309 [inline]\n\tbinderfs_binder_device_create.isra.0+0x17a/0x990 drivers/android/binderfs.c:148\n\tbinder_ctl_ioctl+0x186/0x1b0 drivers/android/binderfs.c:241\n\tvfs_ioctl fs/ioctl.c:51 [inline]\n\t__do_sys_ioctl fs/ioctl.c:597 [inline]\n\t__se_sys_ioctl fs/ioctl.c:583 [inline]\n\t__x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583\n\tdo_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n\tdo_syscall_64+0x116/0x800 arch/x86/entry/syscall_64.c:94\n\tentry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n\tFreed by task 11389:\n\tkasan_save_stack+0x33/0x60 mm/kasan/common.c:57\n\tkasan_save_track+0x14/0x30 mm/kasan/common.c:78\n\tkasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:584\n\tpoison_slab_object mm/kasan/common.c:253 [inline]\n\t__kasan_slab_free+0x5f/0x80 mm/kasan/common.c:285\n\tkasan_slab_free include/linux/kasan.h:235 [inline]\n\tslab_free_hook mm/slub.c:2677 [inline]\n\tslab_free mm/slub.c:6377 [inline]\n\tkfree+0x2fc/0x6e0 mm/slub.c:6692\n\tbinderf\n---truncated---","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"binderfs: fix UAF write in binder_add_device","id":"CVE-2026-98776","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"binder: fix leaked fd fixups on TF_UPDATE_TXN supersede","id":"CVE-2026-98777"},"packages":[],"prev":{"headline":"nitro_enclaves: fix use-after-free on SLOT_ALLOC failure","id":"CVE-2026-98775"},"products":["Linux"],"published":"2026-10-18","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel binderfs allows local attackers to achieve code execution or privilege escalation via race conditions.","url":"https://insights.sbomify.com/CVE-2026-98776/"}