CVE-2026-46155smb/client: fix out-of-bounds read in smb2_compound_op()
- 9.1CriticalCVSS base score
- 0.48%Exploitation in 30 daysEPSS · top 58% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Modified | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.48% · top 58% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Affected products
- affected 7449d736bbbd160c76b01b8fcdf72f58a8757d4b – < dffb44b2e06a2908e249f0f93156fc987eee1d1c
- affected ea41367b2a602f602ea6594fc4a310520dcc64f4 – < 9b3af35645ff9cd334edc130249f9a2fb2bea25f
- affected ea41367b2a602f602ea6594fc4a310520dcc64f4 – < 512d33bc8ea4ea5c19728ee118715f4b1f4d1926
- affected ea41367b2a602f602ea6594fc4a310520dcc64f4 – < a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c
- affected ea41367b2a602f602ea6594fc4a310520dcc64f4 – < 8d09328dfda089675e4c049f3f256064a1d1996b
- affected 6.6.32 – < 6.6.140
- affected 6.9
- unaffected < 6.9
- unaffected 6.6.140 – ≤ 6.6.*
- unaffected 6.12.88 – ≤ 6.12.*
- unaffected 6.18.30 – ≤ 6.18.*
- unaffected 7.0.7 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References5
- https://git.kernel.org/stable/c/dffb44b2e06a2908e249f0f93156fc987eee1d1c (opens in a new tab)
- https://git.kernel.org/stable/c/9b3af35645ff9cd334edc130249f9a2fb2bea25f (opens in a new tab)
- https://git.kernel.org/stable/c/512d33bc8ea4ea5c19728ee118715f4b1f4d1926 (opens in a new tab)
- https://git.kernel.org/stable/c/a16f70a71be4b5a4eccf39a9bf09b47285f4cb7c (opens in a new tab)
- https://git.kernel.org/stable/c/8d09328dfda089675e4c049f3f256064a1d1996b (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32782 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46155)Record last updated .