CVE-2026-46155
Linux Kernel out-of-bounds read
- Published28 May 2026
Description
In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in smb2_compound_op() If a server sends a truncated response but a large OutputBufferLength, and terminates the EA list early, check_wsl_eas() returns success without validating that the entire OutputBufferLength fits within iov_len. Then smb2_compound_op() does: memcpy(idata->wsl.eas, data[0], size[0]); Where size[0] is OutputBufferLength. If iov_len is smaller than size[0], memcpy can read beyond the end of the rsp_iov allocation and leak adjacent kernel heap memory.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HAffected products
Remediation
- https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926
- https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996b
- https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25f
- https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c
- https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1c
References
- https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926
- https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996b
- https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25f
- https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c
- https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1c
Related CVEs
Recent high-severity vulnerabilities sharing a weakness type.
Frequently asked
Is CVE-2026-46155 being actively exploited?
CVE-2026-46155 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.65%.
How severe is CVE-2026-46155?
CVE-2026-46155 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.65% probability of exploitation.
Which products are affected by CVE-2026-46155?
Affected products include Linux Kernel.
How do I fix CVE-2026-46155?
Upgrade affected software to a fixed version, for example Linux Kernel 6.18.30 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-46155 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.