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CVE-2026-45972— smb: client: fix potential UAF and double free in smb2_open_file()

CVSS 9.8 · Critical EPSS 0.06% · P17

Possible ATT&CK Techniques 1AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinux743f70406264348c0830f38409eb6c40a42fb2db< 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74affected
3a6d6b332f92990958602c1e35ce0173e2dd62e9< 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151affected
b64e3b5d8d759dd4333992e4ba4dadf9359952c8< 4d339b219004869e96c4ce56b8891f83a38da4c0affected
9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5< e66dcf7bb9c4df5582c82bc3582725abcbfbea73affected
e3a43633023e3cacaca60d4b8972d084a2b06236< 639deb962986ef2f5e2a6d5a600c66f922471e81affected
e3a43633023e3cacaca60d4b8972d084a2b06236< ebbbc4bfad4cb355d17c671223d0814ee3ef4edaaffected
6.1.163< 6.1.165affected
6.6.124< 6.6.128affected
… +10 more rows
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I. Basic Information for CVE-2026-45972

Vulnerability Information
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Vulnerability Title
smb: client: fix potential UAF and double free in smb2_open_file()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix potential UAF and double free in smb2_open_file() Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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，该漏洞源于在smb2_open_file中未清零err_iov和err_buftype，可能导致释放后重用和双重释放。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 743f70406264348c0830f38409eb6c40a42fb2db ~ 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74 -
LinuxLinux 6.19 -

II. Public POCs for CVE-2026-45972

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III. Intelligence Information for CVE-2026-45972

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Patches & Fixes for CVE-2026-45972 (6)

Same Patch Batch · Linux · 2026-05-27 · 276 CVEs total

CVE-2026-458989.8 CRITICALRDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-459889.8 CRITICALrxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-460399.8 CRITICALrxgk: Fix potential integer overflow in length check
CVE-2026-460439.1 CRITICALRDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-459458.8 HIGHiommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-460568.8 HIGHBluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-458438.2 HIGHslip: bound decode() reads against the compressed packet length
CVE-2026-460378.2 HIGHipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-460998.1 HIGHnet: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-460108.1 HIGHrxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-460767.9 HIGHKVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-459807.8 HIGHaccel/amdxdna: Stop job scheduling across aie2_release_resource()
CVE-2026-459337.8 HIGHbpf: Preserve id of register in sync_linked_regs()
CVE-2026-460367.8 HIGHvfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex
CVE-2026-459317.8 HIGHaccel/amdxdna: Hold mm structure across iommu_sva_unbind_device()
CVE-2026-459297.8 HIGHovpn: fix possible use-after-free in ovpn_net_xmit
CVE-2026-458527.8 HIGHRDMA/rxe: Fix double free in rxe_srq_from_init
CVE-2026-458627.8 HIGHiommu/vt-d: Flush cache for PASID table before using it
CVE-2026-460627.8 HIGHntfs3: fix integer overflow in run_unpack() volume boundary check
CVE-2026-460537.8 HIGHnet: rds: fix MR cleanup on copy error

Showing top 20 of 276 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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