CVE-2024-26594
HighLinux kernel: ksmbd: validate mech token in session setup
Published May 16, 2024 · Updated Sep 9, 2026 · Also known as DEBIAN-CVE-2024-26594, UBUNTU-CVE-2024-26594
Key Facts
Patch immediately- CVE-2024-26594 is a high-severity vulnerability (CVSS 7.1 v3.1) affecting Linux Kernel, Linux (debian), rootio-linux and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 51% probability of exploitation in the next 30 days.
- Fixed versions are available, including bpftool 6.1.75-1.ph5, bpftool NA, hyperv-daemons 5.15.153.1-1.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
7.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS (30-day exploit likelihood)
51%
Higher than 98.9% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2024-26594 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: validate mech token in session setup
If client send invalid mech token in session setup request, ksmbd validate and make the error if it is invalid.
Affected Products
166 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Linux KernelLinux | See advisory | 5.15.149 |
| Linuxdebian | >= 0626e6641f6b467447c81dd7678a69c66f7746cf | 6.1.76-1 |
| rootio-linuxrootio | See advisory | 6.1.76-1 |
| linux-allwinner-5.19ubuntu | See advisory | n/a |
| linux-aws-5.0ubuntu | See advisory | n/a |
Patched Releases
bpftool
6.1.75-1.ph5, NA
hyperv-daemons
5.15.153.1-1
Kernel
5.15.149, 6.1.75, 6.6.14, 6.7.2
Linux
5.15.0-106.116, 6.1.75-1.ph5, 6.1.76-1, 6.6.15-1, NA, 5e6dfec95833edc54c48605a98365a7325e5541e, 6eb8015492bcc84e40646390e50a862b2c0529c9, 92e470163d96df8db6c4fa0f484e4a229edb903d, a2b21ef1ea4cf632d19b3a7cc4d4245b8e63202a, dd1de9268745f0eac83a430db7afc32cbd62e84b
Linux Kernel
5.15.149, 6.1.75, 6.6.14, 6.7.2
linux-aws
5.15.0-1061.67, NA
linux-aws-5.15
5.15.0-1061.67~20.04.1
linux-aws-fips
5.15.0-1061.67+fips1
linux-azure
5.15.0-1063.72
linux-azure-5.15
5.15.0-1063.72~20.04.1
linux-azure-6.5
6.5.0-1022.23~22.04.1
linux-azure-fde
5.15.0-1063.72.1
linux-azure-fde-5.15
5.15.0-1063.72~20.04.1.1
linux-azure-fips
5.15.0-1063.72+fips1
linux-bluefield
5.15.0-1043.45
linux-devel
6.1.75-1.ph5, NA
linux-docs
6.1.75-1.ph5, NA
linux-drivers-gpu
6.1.75-1.ph5, NA
linux-drivers-intel-sgx
NA
linux-drivers-sound
6.1.75-1.ph5, NA
linux-esx
6.1.75-1.ph5, NA
linux-esx-devel
6.1.75-1.ph5
linux-esx-docs
6.1.75-1.ph5
linux-fips
5.15.0-106.116+fips1
linux-gcp
5.15.0-1059.67
Timeline
Publicly disclosed
May 16, 2024
Last updated
Sep 9, 2026
Weakness Type
- CWE-125 Out-of-bounds Read
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26594.json
- advisoryhttps://git.kernel.org/stable/c/1f8d0691c50581ba6043f009ec9e8b9f78f09d5a
- advisoryhttps://git.kernel.org/stable/c/491528935c9c48bf341d8b40eabc6c4fc5df6f2c
- advisoryhttps://git.kernel.org/stable/c/5e6dfec95833edc54c48605a98365a7325e5541e
- advisoryhttps://git.kernel.org/stable/c/6be99c51829b24c914cef5bff6164877178e84d9
FAQ
Common Questions.
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate mech token in session setup If client send invalid mech token in session setup request, ksmbd validate and make the error if it is invalid.
Affected: Linux Kernel; Linux (debian) versions >= 0626e6641f6b467447c81dd7678a69c66f7746cf; rootio-linux, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including bpftool 6.1.75-1.ph5, bpftool NA, hyperv-daemons 5.15.153.1-1.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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