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CVE-2025-39827— net: rose: include node references in rose_neigh refcount

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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rose_neigh引用计数管理不当，可能导致释放后重用。

CVSS 8.8 · High EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1595 · Active Scanning

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 4cce478c3e82a5fc788d72adb2f4c4e983997639 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 9c547c8eee9d1cf6e744611d688b9f725cf9a115 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< d7563b456ed44151e1a82091d96f60166daea89b affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 384210cceb1873a4c8218b27ba0745444436b728 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< da9c9c877597170b929a6121a68dcd3dd9a80f45 affected
2.6.12 affected
< 2.6.12 unaffected
6.1.150≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-39827

Vulnerability Information
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Vulnerability Title
net: rose: include node references in rose_neigh refcount
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: rose: include node references in rose_neigh refcount Current implementation maintains two separate reference counting mechanisms: the 'count' field in struct rose_neigh tracks references from rose_node structures, while the 'use' field (now refcount_t) tracks references from rose_sock. This patch merges these two reference counting systems using 'use' field for proper reference management. Specifically, this patch adds incrementing and decrementing of rose_neigh->use when rose_neigh->count is incremented or decremented. This patch also modifies rose_rt_free(), rose_rt_device_down() and rose_clear_route() to properly release references to rose_neigh objects before freeing a rose_node through rose_remove_node(). These changes ensure rose_neigh structures are properly freed only when all references, including those from rose_node structures, are released. As a result, this resolves a slab-use-after-free issue reported by Syzbot.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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rose_neigh引用计数管理不当，可能导致释放后重用。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ 4cce478c3e82a5fc788d72adb2f4c4e983997639 -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2025-39827

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III. Intelligence Information for CVE-2025-39827

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Same Patch Batch · Linux · 2025-09-16 · 115 CVEs total

CVE-2022-50350 9.8 CRITICAL scsi: target: iscsi: Fix a race condition between login_work and the login thread
CVE-2025-39806 8.8 HIGH HID: multitouch: fix slab out-of-bounds access in mt_report_fixup()
CVE-2023-53305 8.8 HIGH Bluetooth: L2CAP: Fix use-after-free
CVE-2023-53297 8.8 HIGH Bluetooth: L2CAP: fix "bad unlock balance" in l2cap_disconnect_rsp
CVE-2025-39826 8.8 HIGH net: rose: convert 'use' field to refcount_t
CVE-2023-53315 8.8 HIGH wifi: ath11k: Fix SKB corruption in REO destination ring
CVE-2023-53322 8.8 HIGH scsi: qla2xxx: Wait for io return on terminate rport
CVE-2025-39809 8.4 HIGH HID: intel-thc-hid: intel-quicki2c: Fix ACPI dsd ICRS/ISUB length
CVE-2023-53333 8.2 HIGH netfilter: conntrack: dccp: copy entire header to stack buffer, not just basic one
CVE-2022-50341 7.8 HIGH cifs: fix oops during encryption
CVE-2025-39810 7.8 HIGH bnxt_en: Fix memory corruption when FW resources change during ifdown
CVE-2023-53311 7.8 HIGH nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput
CVE-2023-53314 7.8 HIGH fbdev/ep93xx-fb: Do not assign to struct fb_info.dev
CVE-2023-53286 7.8 HIGH RDMA/mlx5: Return the firmware result upon destroying QP/RQ
CVE-2025-39815 7.8 HIGH RISC-V: KVM: fix stack overrun when loading vlenb
CVE-2025-39818 7.8 HIGH HID: intel-thc-hid: intel-thc: Fix incorrect pointer arithmetic in I2C regs save
CVE-2025-39836 7.8 HIGH efi: stmm: Fix incorrect buffer allocation method
CVE-2025-39821 7.8 HIGH perf: Avoid undefined behavior from stopping/starting inactive events
CVE-2022-50339 7.8 HIGH Bluetooth: avoid hci_dev_test_and_set_flag() in mgmt_init_hdev()
CVE-2023-53274 7.8 HIGH clk: mediatek: mt8183: Add back SSPM related clocks

Showing top 20 of 115 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-39827

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