CVE-2026-68130— ksmbd: defer destroy_previous_session() until after NTLM authentication
Affected Version Matrix 12
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 5c833074b549e5db125436a6f681af682261f785 | affected |
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 243f1614ef2aca2d62a744575f1c24b07cd42757 | affected | ||
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 18705cace0619fd2123737dcd028147774f38181 | affected | ||
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< 0ff12308c8a6c16ab68f0a487ffa93d69001dc18 | affected | ||
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9< c74801ee524f477c174a1899782b6c3b6918d407 | affected | ||
5.15 | affected | ||
< 5.15 | unaffected | ||
6.6.148≤ 6.6.* | unaffected | ||
| … +4 more rows | |||
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I. Basic Information for CVE-2026-68130
Vulnerability Information
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Vulnerability Title
ksmbd: defer destroy_previous_session() until after NTLM authentication
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: defer destroy_previous_session() until after NTLM authentication In ntlm_authenticate(), destroy_previous_session() is called using a user pointer resolved from the client-supplied NTLM blob username field before the NTLMv2 response is validated. An authenticated attacker can set the NTLM blob username to match a victim account and set PreviousSessionId to the victim's session ID; destroy_previous_session() destroys the victim's session while ksmbd_decode_ntlmssp_auth_blob() subsequently rejects the request with -EPERM. Move destroy_previous_session() and the prev_id assignment to after ksmbd_decode_ntlmssp_auth_blob() returns success and use sess->user rather than the pre-authentication lookup result. This matches the ordering already used by krb5_authenticate(), where destroy_previous_session() is called only after ksmbd_krb5_authenticate() returns success.
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel 5.15版本存在安全漏洞，该漏洞源于ksmbd在NTLM认证过程中过早调用destroy_previous_session()，使客户端提供的NTLM blob用户名字段在验证前被解析，可能导致已认证攻击者通过构造特制请求销毁受害者会话，造成拒绝服务。
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-2026-68130
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-68130 (5)
Same Patch Batch · Linux · 2026-08-10 · 345 CVEs total
| CVE-2026-68311 | wifi: mt76: mt7925: guard link STA in decap offload | |
| CVE-2026-68321 | net: txgbe: fix FDIR filter leak on remove | |
| CVE-2026-68320 | sctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid | |
| CVE-2026-68319 | pds_core: fix deadlock between reset thread and remove | |
| CVE-2026-68318 | pds_core: fix use-after-free on workqueue during remove | |
| CVE-2026-68317 | pds_core: fix auxiliary device add/del races | |
| CVE-2026-68316 | accel: ethosu: Fix element size accounting for cmd stream validation | |
| CVE-2026-68315 | sctp: validate stream count in sctp_process_strreset_inreq() | |
| CVE-2026-68314 | net: mctp i3c: clean up notifier and buses if driver register fails | |
| CVE-2026-68313 | tipc: fix infinite loop in __tipc_nl_compat_dumpit | |
| CVE-2026-68312 | cifs: fix cifsFileInfo leak on kmalloc failure in deferred close drain paths | |
| CVE-2026-68306 | wifi: mt76: mt7996: fix possible NULL-pointer deref in mt7996_mcu_sta_bfer_eht() | |
| CVE-2026-68301 | net: hsr: fix memory leak on slave unregistration by removing synced VLANs | |
| CVE-2026-68302 | amt: re-read skb header pointers after every pull | |
| CVE-2026-68303 | drm/vc4: hvs/v3d: Fix null dereference in unbind | |
| CVE-2026-68304 | wifi: brcmfmac: fix 802.1X-SHA256 call trace warning | |
| CVE-2026-68305 | drm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers | |
| CVE-2026-68308 | wifi: mt76: mt7996: check pointer returned by mt76_connac_get_he_phy_cap() | |
| CVE-2026-68310 | wifi: mt76: mt7915: guard HE capability lookups | |
| CVE-2026-68309 | wifi: mt76: connac: fix possible NULL-pointer deref in mt76_connac_mcu_uni_bss_he_tlv() |
Showing top 20 of 345 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-68450
btrfs: free mapping node on duplicate reloc root insert - CVE-2026-68449
ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion - CVE-2026-68448
ovl: check access to copy_file_range source with src mounter - CVE-2026-68447
drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to B - CVE-2026-68446
drm/vmwgfx: Validate vmw_surface_metadata::array_size
Same vendor: Linux
- CVE-2026-68450
btrfs: free mapping node on duplicate reloc root insert - CVE-2026-68449
ata: sata_dwc_460ex: fix infinite loop in NCQ tag completion - CVE-2026-68448
ovl: check access to copy_file_range source with src mounter - CVE-2026-68447
drm/amdkfd: clamp v9 CRIU control stack checkpoint copy to B - CVE-2026-68446
drm/vmwgfx: Validate vmw_surface_metadata::array_size
V. Comments for CVE-2026-68130
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