CVE-2025-40028— binder: fix double-free in dbitmap
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I. Basic Information for CVE-2025-40028
Vulnerability Information
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Vulnerability Title
binder: fix double-free in dbitmap
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: binder: fix double-free in dbitmap A process might fail to allocate a new bitmap when trying to expand its proc->dmap. In that case, dbitmap_grow() fails and frees the old bitmap via dbitmap_free(). However, the driver calls dbitmap_free() again when the same process terminates, leading to a double-free error: ================================================================== BUG: KASAN: double-free in binder_proc_dec_tmpref+0x2e0/0x55c Free of addr ffff00000b7c1420 by task kworker/9:1/209 CPU: 9 UID: 0 PID: 209 Comm: kworker/9:1 Not tainted 6.17.0-rc6-dirty #5 PREEMPT Hardware name: linux,dummy-virt (DT) Workqueue: events binder_deferred_func Call trace: kfree+0x164/0x31c binder_proc_dec_tmpref+0x2e0/0x55c binder_deferred_func+0xc24/0x1120 process_one_work+0x520/0xba4 [...] Allocated by task 448: __kmalloc_noprof+0x178/0x3c0 bitmap_zalloc+0x24/0x30 binder_open+0x14c/0xc10 [...] Freed by task 449: kfree+0x184/0x31c binder_inc_ref_for_node+0xb44/0xe44 binder_transaction+0x29b4/0x7fbc binder_thread_write+0x1708/0x442c binder_ioctl+0x1b50/0x2900 [...] ================================================================== Fix this issue by marking proc->map NULL in dbitmap_free().
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于dbitmap_grow失败时未正确处理旧bitmap释放，可能导致双重释放错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-40028
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Same Patch Batch · Linux · 2025-10-28 · 58 CVEs total
| CVE-2025-40064 | smc: Fix use-after-free in __pnet_find_base_ndev(). | |
| CVE-2025-40075 | tcp_metrics: use dst_dev_net_rcu() | |
| CVE-2025-40078 | bpf: Explicitly check accesses to bpf_sock_addr | |
| CVE-2025-40079 | riscv, bpf: Sign extend struct ops return values properly | |
| CVE-2025-40077 | f2fs: fix to avoid overflow while left shift operation | |
| CVE-2025-40081 | perf: arm_spe: Prevent overflow in PERF_IDX2OFF() | |
| CVE-2025-40068 | fs: ntfs3: Fix integer overflow in run_unpack() | |
| CVE-2025-40067 | fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist | |
| CVE-2025-40066 | wifi: mt76: mt7996: Check phy before init msta_link in mt7996_mac_sta_add_links() | |
| CVE-2025-40065 | RISC-V: KVM: Write hgatp register with valid mode bits | |
| CVE-2025-40069 | drm/msm: Fix obj leak in VM_BIND error path | |
| CVE-2025-40063 | crypto: comp - Use same definition of context alloc and free ops | |
| CVE-2025-40062 | crypto: hisilicon/qm - set NULL to qm->debug.qm_diff_regs | |
| CVE-2025-40061 | RDMA/rxe: Fix race in do_task() when draining | |
| CVE-2025-40060 | coresight: trbe: Return NULL pointer for allocation failures | |
| CVE-2025-40058 | iommu/vt-d: Disallow dirty tracking if incoherent page walk | |
| CVE-2025-40059 | coresight: Fix incorrect handling for return value of devm_kzalloc | |
| CVE-2025-40057 | ptp: Add a upper bound on max_vclocks | |
| CVE-2025-40056 | vhost: vringh: Fix copy_to_iter return value check | |
| CVE-2025-40055 | ocfs2: fix double free in user_cluster_connect() |
Showing top 20 of 58 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2025-40028
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