CVE-2024-26692
published 2024-04-03CVE-2024-26692: In the Linux kernel, the following vulnerability has been resolved: smb: Fix regression in writes when non-standard maximum write size negotiated The…
PriorityP423medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
14.6th percentile
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).
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 6.7.7-1 (forky) | linux 6.7.7-1 (forky) |
| linux | linux | — | — |
| linux | linux | >= d08089f649a0cfb2099c8551ac47eef0cc23fdf2 < 4145ccff546ea868428b3e0fe6818c6261b574a9 | 4145ccff546ea868428b3e0fe6818c6261b574a9 |
| linux | linux | >= d08089f649a0cfb2099c8551ac47eef0cc23fdf2 < 63c35afd50e28b49c5b75542045a8c42b696dab9 | 63c35afd50e28b49c5b75542045a8c42b696dab9 |
| linux | linux | >= d08089f649a0cfb2099c8551ac47eef0cc23fdf2 < 4860abb91f3d7fbaf8147d54782149bb1fc45892 | 4860abb91f3d7fbaf8147d54782149bb1fc45892 |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 6.7.7-1 | 6.7.7-1 |
| linux | linux_kernel | >= 0 < 6.7.7-1 | 6.7.7-1 |
| linux | linux_kernel | >= 6.3 < 6.6.18 | 6.6.18 |
| linux | linux_kernel | >= 6.7 < 6.7.6 | 6.7.6 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5LOW
vendor_redhat5.5MEDIUM
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Red Hat
kernel: smb: Fix regression in writes when non-standard maximum write size negotiated
vendor_redhat·2024-04-03·CVSS 5.5
CVE-2024-26692 [MEDIUM] CWE-787 kernel: smb: Fix regression in writes when non-standard maximum write size negotiated
kernel: smb: Fix regression in writes when non-standard maximum write size negotiated
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
Debian
CVE-2024-26692: linux - In the Linux kernel, the following vulnerability has been resolved: smb: Fix re...
vendor_debian·2024·CVSS 5.5
CVE-2024-26692 [MEDIUM] CVE-2024-26692: linux - In the Linux kernel, the following vulnerability has been resolved: smb: Fix re...
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.
VulDB
Linux Kernel up to 6.6.17/6.7.5 smb out-of-bounds write (4145ccff546e/63c35afd50e2/4860abb91f3d / Nessus ID 247818)
vuldb·2026-08-05·CVSS 5.5
CVE-2024-26692 [MEDIUM] Linux Kernel up to 6.6.17/6.7.5 smb out-of-bounds write (4145ccff546e/63c35afd50e2/4860abb91f3d / Nessus ID 247818)
A vulnerability classified as problematic has been found in Linux Kernel up to 6.6.17/6.7.5. The impacted element is an unknown function of the component smb. Performing a manipulation results in out-of-bounds write.
This vulnerability is reported as CVE-2024-26692. The attacker must have access to the local network to execute the attack. No exploit exists.
It is recommended to upgrade the affected component.
GHSA
GHSA-jc4v-c4mw-rmf8: In the Linux kernel, the following vulnerability has been resolved:
smb: Fix regression in writes when non-standard maximum write size negotiated
Th
ghsa_unreviewed·2024-04-03
CVE-2024-26692 [MEDIUM] CWE-787 GHSA-jc4v-c4mw-rmf8: In the Linux kernel, the following vulnerability has been resolved:
smb: Fix regression in writes when non-standard maximum write size negotiated
Th
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 size
OSV
CVE-2024-26692: In the Linux kernel, the following vulnerability has been resolved: smb: Fix regression in writes when non-standard maximum write size negotiated The
osv·2024-04-03·CVSS 5.5
CVE-2024-26692 [MEDIUM] CVE-2024-26692: In the Linux kernel, the following vulnerability has been resolved: smb: Fix regression in writes when non-standard maximum write size negotiated The
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.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://git.kernel.org/stable/c/4145ccff546ea868428b3e0fe6818c6261b574a9https://git.kernel.org/stable/c/4860abb91f3d7fbaf8147d54782149bb1fc45892https://git.kernel.org/stable/c/63c35afd50e28b49c5b75542045a8c42b696dab9https://git.kernel.org/stable/c/4145ccff546ea868428b3e0fe6818c6261b574a9https://git.kernel.org/stable/c/4860abb91f3d7fbaf8147d54782149bb1fc45892https://git.kernel.org/stable/c/63c35afd50e28b49c5b75542045a8c42b696dab9
2024-04-03
Published