CVE-2026-46155smb/client: fix out-of-bounds read in smb2_compound_op()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 7449d736bbbd160c76b01b8fcdf72f58a8757d4b before dffb44b2e06a2908e249f0f93156fc987eee1d1c; from ea41367b2a602f602ea6594fc4a310520dcc64f4 before 9b3af35645ff9cd334edc130249f9a2fb2bea25f; from ea41367b2a602f602ea6594fc4a310520dcc64f4 before 512d33bc8ea4ea5c19728ee118715f4b1f4d1926; from ea41367b2a602f602ea6594fc4a310520dcc64f4 before a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c; from ea41367b2a602f602ea6594fc4a310520dcc64f4 before 8d09328dfda089675e4c049f3f256064a1d1996b; from 6.6.32 before 6.6.140 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.6.32 before 6.6.140; from 6.9 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.7; 7.1; 7.1 | NVD |
References
- https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1cpatch
- https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25fpatch
- https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926patch
- https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7cpatch
- https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996bpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.