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CVE-2026-110714 (GCVE-0-2026-110714)

Vulnerability from nvd – Published: 2026-10-14 15:01 – Updated: 2026-10-14 15:01

Title

libsmb2 through 6.2 Heap Out-of-Bounds Read via decode_acl Integer Underflow

Summary

libsmb2 through 6.2 contains an integer underflow vulnerability in decode_acl that allows malicious SMB servers to trigger heap out-of-bounds reads via crafted security descriptors. Attackers controlling a server or intercepting unsigned sessions can send an AclSize below 8 in a QUERY_INFO reply, bypassing ACE bounds checks and crashing the client.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6249 records in the last 180 days details

References

5 references

URL	Tags
https://hackmd.io/@haind-pwn/libsmb2-query-info-r…	technical-descriptionexploit
https://github.com/sahlberg/libsmb2/blob/d67e213a…	technical-description
https://github.com/sahlberg/libsmb2/commit/523abe…	patch
https://github.com/sahlberg/libsmb2	product
https://www.vulncheck.com/advisories/libsmb2-thro…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sahlberg	libsmb2	Affected: 0 , ≤ 6.2 (custom)

Date Public

2026-07-10 00:00

Credits

韓佳翰 HaiND from the Post and Telecommunication Institute of Technology

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://github.com/sahlberg/libsmb2",
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CVE-2026-110713 (GCVE-0-2026-110713)

Vulnerability from nvd – Published: 2026-10-14 15:01 – Updated: 2026-10-14 19:49

Title

libsmb2 through 6.2 Heap Out-of-Bounds Read via File System Info Decoders

Summary

libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in smb2_decode_file_fs_volume_info and smb2_decode_file_fs_attribute_info that allows malicious SMB servers to read past reply buffers. Attackers controlling a server or intercepting unsigned sessions can send crafted QUERY_INFO replies with missing or oversized name lengths to crash the client.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-14 19:48 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6249 records in the last 180 days details

References

5 references

URL	Tags
https://hackmd.io/@haind-pwn/libsmb2-query-info-r…	technical-descriptionexploit
https://github.com/sahlberg/libsmb2/blob/d67e213a…	technical-description
https://github.com/sahlberg/libsmb2/commit/dd0bbd…	patch
https://github.com/sahlberg/libsmb2	product
https://www.vulncheck.com/advisories/libsmb2-thro…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sahlberg	libsmb2	Affected: 0 , ≤ 6.2 (custom)

Date Public

2026-07-28 00:00

Credits

Benjamin Ali HaiND from the Post and Telecommunication Institute of Technology

Show details on NVD website

JSON

To clipboard

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CVE-2026-110712 (GCVE-0-2026-110712)

Vulnerability from nvd – Published: 2026-10-14 15:01 – Updated: 2026-10-14 17:40

Title

libsmb2 through 6.2 Heap Out-of-Bounds Read via smb2_decode_file_all_info

Summary

libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in smb2_decode_file_all_info that allows malicious SMB servers to crash clients by sending an unchecked FileNameLength. Attackers controlling the server or performing man-in-the-middle on unsigned sessions can return crafted FileAllInformation replies to smb2_stat or smb2_fstat calls, crashing the client.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-14 17:39 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6249 records in the last 180 days details

References

5 references

URL	Tags
https://hackmd.io/@haind-pwn/libsmb2-query-info-r…	technical-descriptionexploit
https://github.com/sahlberg/libsmb2/blob/d67e213a…	technical-description
https://github.com/sahlberg/libsmb2/commit/57bee9…	patch
https://github.com/sahlberg/libsmb2	product
https://www.vulncheck.com/advisories/libsmb2-thro…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sahlberg	libsmb2	Affected: 0 , ≤ 6.2 (custom)

Date Public

2026-06-09 00:00

Credits

tonghuaroot HaiND from the Post and Telecommunication Institute of Technology

Show details on NVD website

JSON

To clipboard

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CVE-2026-110714 (GCVE-0-2026-110714)

Vulnerability from cvelistv5 – Published: 2026-10-14 15:01 – Updated: 2026-10-14 15:01

Title

libsmb2 through 6.2 Heap Out-of-Bounds Read via decode_acl Integer Underflow

Summary

libsmb2 through 6.2 contains an integer underflow vulnerability in decode_acl that allows malicious SMB servers to trigger heap out-of-bounds reads via crafted security descriptors. Attackers controlling a server or intercepting unsigned sessions can send an AclSize below 8 in a QUERY_INFO reply, bypassing ACE bounds checks and crashing the client.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6249 records in the last 180 days details

References

5 references

URL	Tags
https://hackmd.io/@haind-pwn/libsmb2-query-info-r…	technical-descriptionexploit
https://github.com/sahlberg/libsmb2/blob/d67e213a…	technical-description
https://github.com/sahlberg/libsmb2/commit/523abe…	patch
https://github.com/sahlberg/libsmb2	product
https://www.vulncheck.com/advisories/libsmb2-thro…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sahlberg	libsmb2	Affected: 0 , ≤ 6.2 (custom)

Date Public

2026-07-10 00:00

Credits

韓佳翰 HaiND from the Post and Telecommunication Institute of Technology

Show details on NVD website

JSON

To clipboard

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CVE-2026-110713 (GCVE-0-2026-110713)

Vulnerability from cvelistv5 – Published: 2026-10-14 15:01 – Updated: 2026-10-14 19:49

Title

libsmb2 through 6.2 Heap Out-of-Bounds Read via File System Info Decoders

Summary

libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in smb2_decode_file_fs_volume_info and smb2_decode_file_fs_attribute_info that allows malicious SMB servers to read past reply buffers. Attackers controlling a server or intercepting unsigned sessions can send crafted QUERY_INFO replies with missing or oversized name lengths to crash the client.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-14 19:48 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6249 records in the last 180 days details

References

5 references

URL	Tags
https://hackmd.io/@haind-pwn/libsmb2-query-info-r…	technical-descriptionexploit
https://github.com/sahlberg/libsmb2/blob/d67e213a…	technical-description
https://github.com/sahlberg/libsmb2/commit/dd0bbd…	patch
https://github.com/sahlberg/libsmb2	product
https://www.vulncheck.com/advisories/libsmb2-thro…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sahlberg	libsmb2	Affected: 0 , ≤ 6.2 (custom)

Date Public

2026-07-28 00:00

Credits

Benjamin Ali HaiND from the Post and Telecommunication Institute of Technology

Show details on NVD website

JSON

To clipboard

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CVE-2026-110712 (GCVE-0-2026-110712)

Vulnerability from cvelistv5 – Published: 2026-10-14 15:01 – Updated: 2026-10-14 17:40

Title

libsmb2 through 6.2 Heap Out-of-Bounds Read via smb2_decode_file_all_info

Summary

libsmb2 through 6.2 contains a heap out-of-bounds read vulnerability in smb2_decode_file_all_info that allows malicious SMB servers to crash clients by sending an unchecked FileNameLength. Attackers controlling the server or performing man-in-the-middle on unsigned sessions can return crafted FileAllInformation replies to smb2_stat or smb2_fstat calls, crashing the client.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-14 17:39 UTC

CWE

CWE-125 - Out-of-bounds Read

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6249 records in the last 180 days details

References

5 references

URL	Tags
https://hackmd.io/@haind-pwn/libsmb2-query-info-r…	technical-descriptionexploit
https://github.com/sahlberg/libsmb2/blob/d67e213a…	technical-description
https://github.com/sahlberg/libsmb2/commit/57bee9…	patch
https://github.com/sahlberg/libsmb2	product
https://www.vulncheck.com/advisories/libsmb2-thro…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
sahlberg	libsmb2	Affected: 0 , ≤ 6.2 (custom)

Date Public

2026-06-09 00:00

Credits

tonghuaroot HaiND from the Post and Telecommunication Institute of Technology

Show details on NVD website

JSON

To clipboard

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Find a vulnerability

Search criteria

6 vulnerabilities found for libsmb2 by sahlberg

CVE-2026-110714 (GCVE-0-2026-110714)

CVE-2026-110713 (GCVE-0-2026-110713)

CVE-2026-110712 (GCVE-0-2026-110712)

CVE-2026-110714 (GCVE-0-2026-110714)

CVE-2026-110713 (GCVE-0-2026-110713)

CVE-2026-110712 (GCVE-0-2026-110712)