CVE-2026-46234— vsock: fix buffer size clamping order
Possible ATT&CK Techniques 1AI
T1564.001 · Hidden Files and DirectoriesAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97< f6ec135941d2c1c2dbb87b5ce1783f4f6ac6ccca | affected |
b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97< caf11dfea5233a69298a1c448bbf8d1639c80536 | affected | ||
b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97< 01ef69785dc3162f588a361ab770b1e312800188 | affected | ||
b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97< a998a7e250bf976539e05a00ec64a81292afecaa | affected | ||
b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97< 310da27932dd0afe7ce7456dfe1f0814c3301f41 | affected | ||
b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97< 2602f7bb5818e92315feeaeb71d8ce4d5c9ab160 | affected | ||
b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97< 0b68881501460c3761f196469e1e503218c5e536 | affected | ||
b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97< d114bfdc9b76bf93b881e195b7ec957c14227bab | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-46234
Vulnerability Information
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Vulnerability Title
vsock: fix buffer size clamping order
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vsock: fix buffer size clamping order In vsock_update_buffer_size(), the buffer size was being clamped to the maximum first, and then to the minimum. If a user sets a minimum buffer size larger than the maximum, the minimum check overrides the maximum check, inverting the constraint. This breaks the intended socket memory boundaries by allowing the vsk->buffer_size to grow beyond the configured vsk->buffer_max_size. Fix this by checking the minimum first, and then the maximum. This ensures the buffer size never exceeds the buffer_max_size.
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vsock缓冲区大小限制顺序错误，先限制最大值再限制最小值，导致缓冲区大小可能超过buffer_max_size。
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-2026-46234
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-46234 (8)
Same Patch Batch · Linux · 2026-05-28 · 138 CVEs total
| CVE-2026-46135 | 9.8 CRITICAL | nvmet-tcp: fix race between ICReq handling and queue teardown |
| CVE-2026-46137 | 9.8 CRITICAL | mptcp: pm: ADD_ADDR rtx: fix potential data-race |
| CVE-2026-46195 | 9.8 CRITICAL | smb: client: validate dacloffset before building DACL pointers |
| CVE-2026-46115 | 9.8 CRITICAL | block: add pgmap check to biovec_phys_mergeable |
| CVE-2026-46185 | 9.1 CRITICAL | smb/client: fix out-of-bounds read in symlink_data() |
| CVE-2026-46119 | 9.1 CRITICAL | libceph: Fix slab-out-of-bounds access in auth message processing |
| CVE-2026-46155 | 9.1 CRITICAL | smb/client: fix out-of-bounds read in smb2_compound_op() |
| CVE-2026-46152 | 8.8 HIGH | wifi: mac80211: drop stray 'static' from fast-RX rx_result |
| CVE-2026-46198 | 8.8 HIGH | batman-adv: fix integer overflow on buff_pos |
| CVE-2026-46125 | 8.8 HIGH | wifi: mac80211: remove station if connection prep fails |
| CVE-2026-46238 | 8.8 HIGH | batman-adv: stop caching unowned originator pointers in BAT IV |
| CVE-2026-46174 | 8.8 HIGH | x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache |
| CVE-2026-46113 | 8.8 HIGH | KVM: x86: Fix shadow paging use-after-free due to unexpected GFN |
| CVE-2026-46166 | 8.8 HIGH | wifi: mac80211: use safe list iteration in radar detect work |
| CVE-2026-46212 | 8.8 HIGH | batman-adv: bla: prevent use-after-free when deleting claims |
| CVE-2026-46138 | 8.1 HIGH | Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt |
| CVE-2026-46232 | 8.1 HIGH | HID: playstation: Clamp num_touch_reports |
| CVE-2026-46208 | 7.8 HIGH | batman-adv: stop tp_meter sessions during mesh teardown |
| CVE-2026-46206 | 7.8 HIGH | batman-adv: reject new tp_meter sessions during teardown |
| CVE-2026-46209 | 7.8 HIGH | drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() |
Showing top 20 of 138 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46243
smb: client: reject userspace cifs.spnego descriptions - CVE-2026-46242
eventpoll: fix ep_remove struct eventpoll / struct file UAF - CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf
Same vendor: Linux
- CVE-2026-46243
smb: client: reject userspace cifs.spnego descriptions - CVE-2026-46242
eventpoll: fix ep_remove struct eventpoll / struct file UAF - CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf
V. Comments for CVE-2026-46234
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