CVE-2025-39816— io_uring/kbuf: always use READ_ONCE() to read ring provided buffer lengths
Affected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | ae98dbf43d755b4e111fcd086e53939bef3e9a1a< 695673eb5711ee5eb1769481cf1503714716a7d1 | affected |
ae98dbf43d755b4e111fcd086e53939bef3e9a1a< 91f262ea2a76a02d9e37dba6637cfe6feebb20a8 | affected | ||
ae98dbf43d755b4e111fcd086e53939bef3e9a1a< 390a61d284e1ced088d43928dfcf6f86fffdd780 | affected | ||
ae98dbf43d755b4e111fcd086e53939bef3e9a1a< 98b6fa62c84f2e129161e976a5b9b3cb4ccd117b | affected | ||
6.12 | affected | ||
< 6.12 | unaffected | ||
6.12.49≤ 6.12.* | unaffected | ||
6.12.81≤ 6.12.* | unaffected | ||
| … +2 more rows | |||
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I. Basic Information for CVE-2025-39816
Vulnerability Information
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Vulnerability Title
io_uring/kbuf: always use READ_ONCE() to read ring provided buffer lengths
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: always use READ_ONCE() to read ring provided buffer lengths Since the buffers are mapped from userspace, it is prudent to use READ_ONCE() to read the value into a local variable, and use that for any other actions taken. Having a stable read of the buffer length avoids worrying about it changing after checking, or being read multiple times. Similarly, the buffer may well change in between it being picked and being committed. Ensure the looping for incremental ring buffer commit stops if it hits a zero sized buffer, as no further progress can be made at that point.
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，该漏洞源于未使用READ_ONCE读取环形缓冲区长度，可能导致数据不一致性。
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-2025-39816
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|---|
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Patches & Fixes for CVE-2025-39816 (1)
Same Patch Batch · Linux · 2025-09-16 · 115 CVEs total
| CVE-2022-50340 | media: vimc: Fix wrong function called when vimc_init() fails | |
| CVE-2023-53307 | rbd: avoid use-after-free in do_rbd_add() when rbd_dev_create() fails | |
| CVE-2023-53305 | Bluetooth: L2CAP: Fix use-after-free | |
| CVE-2023-53304 | netfilter: nft_set_rbtree: fix overlap expiration walk | |
| CVE-2022-50351 | cifs: Fix xid leak in cifs_create() | |
| CVE-2022-50352 | net: hns: fix possible memory leak in hnae_ae_register() | |
| CVE-2022-50350 | scsi: target: iscsi: Fix a race condition between login_work and the login thread | |
| CVE-2022-50348 | nfsd: Fix a memory leak in an error handling path | |
| CVE-2022-50349 | misc: tifm: fix possible memory leak in tifm_7xx1_switch_media() | |
| CVE-2022-50347 | mmc: rtsx_usb_sdmmc: fix return value check of mmc_add_host() | |
| CVE-2022-50346 | ext4: init quota for 'old.inode' in 'ext4_rename' | |
| CVE-2022-50343 | rapidio: fix possible name leaks when rio_add_device() fails | |
| CVE-2022-50344 | ext4: fix null-ptr-deref in ext4_write_info | |
| CVE-2022-50342 | floppy: Fix memory leak in do_floppy_init() | |
| CVE-2022-50341 | cifs: fix oops during encryption | |
| CVE-2025-39827 | net: rose: include node references in rose_neigh refcount | |
| CVE-2025-39830 | net/mlx5: HWS, Fix memory leak in hws_pool_buddy_init error path | |
| CVE-2025-39829 | trace/fgraph: Fix the warning caused by missing unregister notifier | |
| CVE-2025-39828 | atm: atmtcp: Prevent arbitrary write in atmtcp_recv_control(). | |
| CVE-2025-39831 | fbnic: Move phylink resume out of service_task and into open/close |
Showing top 20 of 115 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-45846
bareudp: fix NULL pointer dereference in bareudp_fill_metada - CVE-2026-45845
net/sched: taprio: fix NULL pointer dereference in class dum - CVE-2026-45844
netfilter: arp_tables: fix IEEE1394 ARP payload parsing - CVE-2026-45843
slip: bound decode() reads against the compressed packet len - CVE-2026-45842
slip: reject VJ receive packets on instances with no rstate
Same vendor: Linux
- CVE-2026-45846
bareudp: fix NULL pointer dereference in bareudp_fill_metada - CVE-2026-45845
net/sched: taprio: fix NULL pointer dereference in class dum - CVE-2026-45844
netfilter: arp_tables: fix IEEE1394 ARP payload parsing - CVE-2026-45843
slip: bound decode() reads against the compressed packet len - CVE-2026-45842
slip: reject VJ receive packets on instances with no rstate
V. Comments for CVE-2025-39816
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