CVE-2026-89632
- Source
- https://cve.org/CVERecord?id=CVE-2026-89632
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89632.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-89632
- Downstream
- Related
- Published
- 2026-09-11T19:45:27Z
- Modified
- 2026-10-24T02:30:57Z
- Severity
-
- 8.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H CVSS Calculator
- Summary
- smb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr()
reparse_buf_ptr() reads buf->ReparseDataLength before checking that count covers the full fixed header:
buf = (struct reparse_data_buffer *)((u8 *)io + off); len = sizeof(*buf); /* 8 bytes */ rdlen = le16_to_cpu(buf->ReparseDataLength); /* offset 4, 2 bytes */ if (count < len || count < rdlen + len) /* check comes after */struct reparse_data_buffer has ReparseDataLength at offset 4. If a server returns OutputCount < 6, the read at offset 4-5 reaches past the end of the received data. The off+count bounds against iov_len were already validated, but that does not protect against count being smaller than sizeof(*buf).
Split the check: verify count >= sizeof(*buf) before reading ReparseDataLength, then verify count covers the data region.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89632.json" }- References
-
- https://git.kernel.org/stable/c/05f78e6cf34ea3a285053bd5999e08e8ac298bd5
- https://git.kernel.org/stable/c/711cf71300d7992f450600df8864917d3538679f
- https://git.kernel.org/stable/c/b70bc592afd19732e2e4563300ebe8f974280365
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89632.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-89632
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda158bb66b1373866d9fd5997565a58a573085539Fixedb70bc592afd19732e2e4563300ebe8f974280365
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced67ec9949b0dfe78c99e110dd975eb7dc5645630cFixed711cf71300d7992f450600df8864917d3538679fFixed05f78e6cf34ea3a285053bd5999e08e8ac298bd5
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.6.32Fixed6.6.160
Affected versions
v6.*
v6.6.100
v6.6.101
v6.6.102
v6.6.103
v6.6.104
v6.6.105
v6.6.106
v6.6.107
v6.6.108
v6.6.109
v6.6.110
v6.6.111
v6.6.112
v6.6.113
v6.6.114
v6.6.115
v6.6.116
v6.6.117
v6.6.118
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v6.6.120
v6.6.121
v6.6.122
v6.6.123
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v6.6.125
v6.6.126
v6.6.127
v6.6.128
v6.6.129
v6.6.130
v6.6.131
v6.6.132
v6.6.133
v6.6.134
v6.6.135
v6.6.136
v6.6.137
v6.6.138
v6.6.139
v6.6.140
v6.6.141
v6.6.142
v6.6.143
v6.6.144
v6.6.145
v6.6.146
v6.6.147
v6.6.148
v6.6.149
v6.6.150
v6.6.151
v6.6.152
v6.6.153
v6.6.154
v6.6.155
v6.6.156
v6.6.157
v6.6.158
v6.6.159
v6.6.32
v6.6.33
v6.6.34
v6.6.35
v6.6.36
v6.6.37
v6.6.38
v6.6.39
v6.6.40
v6.6.41
v6.6.42
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v6.6.48
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v6.6.54
v6.6.55
v6.6.56
v6.6.57
v6.6.58
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v6.6.87
v6.6.88
v6.6.89
v6.6.90
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v6.6.94
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