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CVE-2026-93812— ksmbd: fix sd_ndr.data memory leak in ksmbd_vfs_set_sd_xattr

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.

在 Linux 内核中，已解决以下漏洞： ksmbd：修复 ksmbd_vfs_set_sd_xattr 中 sd_ndr.data 的内存泄漏 在 ndr_encode_v4_ntacl() 函数入口处，通过 kzalloc() 分配了 sd_ndr.data。如果在编码过程中，任何后续的 ndr_write_*() 调用返回错误，则已分配的 sd_ndr.data 不会被释放，从而导致内存泄漏。 将 kfree(sd_ndr.data) 移至出口标签（out label）处，以确保在所有成功和错误返回路径上都能

AI Predicted 5.5 Difficulty: Easy EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1610 · Deploy Container

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 303fff2b8c77a85c62dbde3b27c24b084144c04c< 306d6f370da7e0e5532dc51c972f4ce101e42431 affected
303fff2b8c77a85c62dbde3b27c24b084144c04c< dc55270e410ccb4d24e637c13b5c4c25bcd106d7 affected
303fff2b8c77a85c62dbde3b27c24b084144c04c< c866c3314a6853eb06c7a8bef67f43c8a8bdfb6e affected
303fff2b8c77a85c62dbde3b27c24b084144c04c< 9b4dec75498fd0a1c9eaea680aef59c9519eb16f affected
303fff2b8c77a85c62dbde3b27c24b084144c04c< c521dd78e036b5e0cfd394dd2ff2218890dd9e41 affected
303fff2b8c77a85c62dbde3b27c24b084144c04c< d4d56b00c7df88cd5751e7415bdfabc9fdbc82a7 affected
5.15 affected
< 5.15 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-93812

Vulnerability Information
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Vulnerability Title
ksmbd: fix sd_ndr.data memory leak in ksmbd_vfs_set_sd_xattr
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix sd_ndr.data memory leak in ksmbd_vfs_set_sd_xattr ndr_encode_v4_ntacl() allocates sd_ndr.data via kzalloc() at entry. If any subsequent ndr_write_*() call returns error during encoding, the allocated sd_ndr.data won't be freed and causes memory leak. Move kfree(sd_ndr.data) into out label to ensure the buffer gets released on all success and error return paths.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 303fff2b8c77a85c62dbde3b27c24b084144c04c ~ 306d6f370da7e0e5532dc51c972f4ce101e42431 -
Linux Linux 5.15 -

II. Public POCs for CVE-2026-93812

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III. Intelligence Information for CVE-2026-93812

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Patches & Fixes for CVE-2026-93812 (6)

Same Patch Batch · Linux · 2026-09-24 · 234 CVEs total

CVE-2026-93207 9.8 CRITICAL SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry
CVE-2026-97413 9.8 CRITICAL RDMA/rtrs-srv: Fix integer underflow in process_read and process_write
CVE-2026-93228 9.1 CRITICAL svcrdma: Reject Write/Reply chunks with segcount 0
CVE-2026-93793 8.8 HIGH wifi: iwlwifi: mvm: validate TX_CMD response layout
CVE-2026-93790 8.8 HIGH wifi: iwlwifi: mvm: fix out-of-bounds tid_data access in BA notif
CVE-2026-93799 8.8 HIGH wifi: iwlwifi: mvm: validate sta_id in BA window status notif
CVE-2026-97442 8.8 HIGH wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
CVE-2026-93806 8.8 HIGH wifi: cfg80211: validate assoc response length before status and IE access
CVE-2026-97509 8.8 HIGH thunderbolt: Keep XDomain reference during the lifetime of a service
CVE-2026-97409 8.8 HIGH nvme-fc: Do not cancel requests in io target before it is initialized
CVE-2026-93280 8.8 HIGH greybus: audio: bound the topology section sizes against the fetched size
CVE-2026-93284 8.8 HIGH drm/pagemap: dma-unmap pages before handling migration errors
CVE-2026-97451 8.4 HIGH ACPICA: Fix integer overflow in acpi_ex_opcode_3A_1T_1R() (mid_op)
CVE-2026-97452 8.4 HIGH ACPICA: Prevent adding invalid references
CVE-2026-97455 8.4 HIGH ACPICA: Fix use-after-free in acpi_ds_terminate_control_method()
CVE-2026-97450 8.4 HIGH ACPICA: validate handler object type in two places
CVE-2026-93827 8.4 HIGH virtio-fs: avoid double-free on failed queue setup
CVE-2026-97433 8.2 HIGH nvme: validate FDP configuration descriptor sizes
CVE-2026-93224 8.1 HIGH svcrdma: Fix unmatched rn_unregister on failed accept
CVE-2026-93787 8.1 HIGH smb: client: bound dirent name against end of SMB response in cifs_filldir

Showing top 20 of 234 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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