CVE-2024-26692
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2024-26692
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26692.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-26692
- Downstream
- Related
- Published
- 2024-04-03T14:54:53Z
- Modified
- 2025-10-21T18:38:54.951061Z
- Summary
- smb: Fix regression in writes when non-standard maximum write size negotiated
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
smb: Fix regression in writes when non-standard maximum write size negotiated
The conversion to netfs in the 6.3 kernel caused a regression when maximum write size is set by the server to an unexpected value which is not a multiple of 4096 (similarly if the user overrides the maximum write size by setting mount parm "wsize", but sets it to a value that is not a multiple of 4096). When negotiated write size is not a multiple of 4096 the netfs code can skip the end of the final page when doing large sequential writes, causing data corruption.
This section of code is being rewritten/removed due to a large netfs change, but until that point (ie for the 6.3 kernel until now) we can not support non-standard maximum write sizes.
Add a warning if a user specifies a wsize on mount that is not a multiple of 4096 (and round down), also add a change where we round down the maximum write size if the server negotiates a value that is not a multiple of 4096 (we also have to check to make sure that we do not round it down to zero).
- References
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
-
Introducedd08089f649a0cfb2099c8551ac47eef0cc23fdf2Fixed4145ccff546ea868428b3e0fe6818c6261b574a9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd08089f649a0cfb2099c8551ac47eef0cc23fdf2Fixed63c35afd50e28b49c5b75542045a8c42b696dab9
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd08089f649a0cfb2099c8551ac47eef0cc23fdf2Fixed4860abb91f3d7fbaf8147d54782149bb1fc45892