CVE-2026-46185— smb/client: fix out-of-bounds read in symlink_data()
Possible ATT&CK Techniques 2AI
T1190 · Exploit Public-Facing Application T1210 · Exploitation of Remote ServicesAffected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 76894f3e2f71177747b8b4763fb180e800279585< ef6495d4df6e7af8f3de67e65150881c880f696c | affected |
76894f3e2f71177747b8b4763fb180e800279585< 15dc0a4de743a1aaa7b859b3aea79f08c695396c | affected | ||
76894f3e2f71177747b8b4763fb180e800279585< b8c8a704f0bc133deb171f6aeb6f3a684203e212 | affected | ||
76894f3e2f71177747b8b4763fb180e800279585< b9561402489d41149f63e001a74384863b7b30a6 | affected | ||
76894f3e2f71177747b8b4763fb180e800279585< d62b8d236fab503c6fec1d3e9a38bea71feaca20 | affected | ||
2d046892a493d9760c35fdaefc3017f27f91b621 | affected | ||
6.0.16< 6.1 | affected | ||
6.1 | affected | ||
| … +6 more rows | |||
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I. Basic Information for CVE-2026-46185
Vulnerability Information
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Vulnerability Title
smb/client: fix out-of-bounds read in symlink_data()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in symlink_data() Since smb2_check_message() returns success without length validation for the symlink error response, in symlink_data() it is possible for iov->iov_len to be smaller than sizeof(struct smb2_err_rsp). If the buffer only contains the base SMB2 header (64 bytes), accessing err->ErrorContextCount (at offset 66) or err->ByteCount later in symlink_data() will cause an out-of-bounds read.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
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smb/client中symlink_data函数存在越界读取，由于smb2_check_message返回成功时未对长度进行验证，导致访问err->ErrorContextCount或err->ByteCount时可能发生越界读取。
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-2026-46185
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-46185 (4)
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-2026-46119 | 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-2026-46166 | 8.8 HIGH | wifi: mac80211: use safe list iteration in radar detect work |
| 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-2026-46174 | 8.8 HIGH | x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache |
| CVE-2026-46238 | 8.8 HIGH | batman-adv: stop caching unowned originator pointers in BAT IV |
| CVE-2026-46152 | 8.8 HIGH | wifi: mac80211: drop stray 'static' from fast-RX rx_result |
| CVE-2026-46113 | 8.8 HIGH | KVM: x86: Fix shadow paging use-after-free due to unexpected GFN |
| 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-2026-46227 | 7.8 HIGH | sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL |
| CVE-2026-46201 | 7.8 HIGH | drm/xe: Fix dma-buf attachment leak in xe_gem_prime_import() |
| CVE-2026-46157 | 7.8 HIGH | ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger |
| CVE-2026-46181 | 7.8 HIGH | RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() |
Showing top 20 of 138 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- 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 - CVE-2026-46238
batman-adv: stop caching unowned originator pointers in BAT
Same vendor: Linux
- 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 - CVE-2026-46238
batman-adv: stop caching unowned originator pointers in BAT
V. Comments for CVE-2026-46185
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