CVE-2026-64386— smb: client: fix query_info() replay double-free
Possible ATT&CK Techniques 1AI
T1211 · Exploitation for StealthAffected Version Matrix 13
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 433042a91f9373241307725b52de573933ffedbf< 100fb7c455fa86d248b8bd7bb9de757c192870b4 | affected |
4f1fffa2376922f3d1d506e49c0fd445b023a28e< 3c81dda84799f76b42aec598564316e2964440db | affected | ||
4f1fffa2376922f3d1d506e49c0fd445b023a28e< f1add4acb656f5a82806a1ab0e63fed3d8b1bfca | affected | ||
4f1fffa2376922f3d1d506e49c0fd445b023a28e< 89234773e8348918111aa15f6922b58cf3843364 | affected | ||
4f1fffa2376922f3d1d506e49c0fd445b023a28e< 2a88561d66eb855813cf004a0abe648bbb17de5e | affected | ||
6.6.32< 6.6.145 | affected | ||
6.8 | affected | ||
< 6.8 | unaffected | ||
| … +5 more rows | |||
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-64386
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
smb: client: fix query_info() replay double-free
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query_info() replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_info_init() fails before the next send, cleanup retains the previous buffer type and frees that response again. Reset response bookkeeping before each attempt to prevent the stale free.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/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基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于smb客户端的query_info函数在处理响应缓冲区时存在双重释放问题。
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-2026-64386
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-64386
请登录查看更多情报信息。
Patches & Fixes for CVE-2026-64386 (5)
Same Patch Batch · Linux · 2026-07-25 · 274 CVEs total
| CVE-2026-64355 | 9.8 CRITICAL | bpf: Reject fragmented frames in devmap |
| CVE-2026-64410 | 9.8 CRITICAL | netfilter: flowtable: IPIP tunnel hardware offload is not yet support |
| CVE-2026-64399 | 9.8 CRITICAL | ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE |
| CVE-2026-64397 | 9.8 CRITICAL | ksmbd: serialize QUERY_DIRECTORY requests per file |
| CVE-2026-64391 | 9.8 CRITICAL | ksmbd: use opener credentials for ADS I/O |
| CVE-2026-64387 | 9.8 CRITICAL | smb: client: fix query directory replay double-free |
| CVE-2026-64385 | 9.8 CRITICAL | smb: client: fix double-free in SMB2_ioctl() replay |
| CVE-2026-64383 | 9.8 CRITICAL | smb: client: fix double-free in SMB2_flush() replay |
| CVE-2026-64384 | 9.8 CRITICAL | smb: client: fix change notify replay double-free |
| CVE-2026-64268 | 9.8 CRITICAL | RDMA/siw: bound Read Response placement to the RREAD length |
| CVE-2026-64439 | 9.8 CRITICAL | crypto: krb5 - filter out async aead implementations at alloc |
| CVE-2026-64303 | 9.8 CRITICAL | spi: fsl-lpspi: terminate the RX channel on TX prepare failure path |
| CVE-2026-64523 | 9.8 CRITICAL | net/handshake: Take a long-lived file reference at submit |
| CVE-2026-64459 | 9.8 CRITICAL | tcp: restore RCU grace period in tcp_ao_destroy_sock |
| CVE-2026-64319 | 9.1 CRITICAL | nvmet-auth: validate reply message payload bounds against transfer length |
| CVE-2026-64257 | 9.1 CRITICAL | smb: client: reject overlapping data areas in SMB2 responses |
| CVE-2026-64269 | 9.1 CRITICAL | RDMA/rtrs-srv: Bound RDMA-Write length to chunk size in rdma_write_sg |
| CVE-2026-64393 | 9.1 CRITICAL | ksmbd: run set info with opener credentials |
| CVE-2026-64392 | 9.1 CRITICAL | ksmbd: use opener credentials for delete-on-close |
| CVE-2026-64320 | 9.1 CRITICAL | nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page |
Showing top 20 of 274 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-64560
posix-cpu-timers: Prevent UAF caused by non-leader exec() ra - CVE-2026-64559
s390/pkey: Check length in PKEY_VERIFYPROTK ioctl - CVE-2026-64558
s390/pkey: Check length in pkey_pckmo handler implementation - CVE-2026-64556
perf/core: Detach event groups during remove_on_exec - CVE-2026-64557
Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_new_conne
Same vendor: Linux
- CVE-2026-64560
posix-cpu-timers: Prevent UAF caused by non-leader exec() ra - CVE-2026-64559
s390/pkey: Check length in PKEY_VERIFYPROTK ioctl - CVE-2026-64558
s390/pkey: Check length in pkey_pckmo handler implementation - CVE-2026-64556
perf/core: Detach event groups during remove_on_exec - CVE-2026-64557
Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_new_conne
V. Comments for CVE-2026-64386
No comments yet