ksmbd: prevent out-of-bounds reads in share config responses
Priority LOW 30Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds reads in share config responses Validate IPC share configuration payload sizes before consuming variable-length fields. Bound veto list parsing and account for the separator byte when deriving the path length.
Why it matters now
EPSS 0.00164 5th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.15.222, 6.1.189, 6.6.158 +5
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.15.157 to before 5.15.222; 6.1.85 to before 6.1.189; 6.6.26 to before 6.6.158; 6.8.5 to before 6.9 | 5.15.222, 6.1.189, 6.6.158, 6.9 | Patch available | CNA |
| Linux | Linux | 6.9 and later | 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.6, 7.3 | Patch available | CNA |
- Linux VendorLinux Affected 5.15.157 to before 5.15.222; 6.1.85 to before 6.1.189; 6.6.26 to before 6.6.158; 6.8.5 to before 6.9 Fixed in 5.15.222, 6.1.189, 6.6.158, 6.9 Patch available CNA
- Linux VendorLinux Affected 6.9 and later Fixed in 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.6, 7.3 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.222, 6.1.189, 6.6.158, 6.9
- Fix · CNA Linux (Linux) Fixed in 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.6, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 7 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89792
- 2026-10-03 Alias added: GHSA-5h65-jm98-j8f7
- 2026-10-03 Fix available: Linux/Linux@0127f1c119bde40578f4d25f5d17333b4e75de8c, Linux/[email protected], Linux/[email protected] +3 · CNA
- 2026-10-03 3 new references · CNA
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
Other 7
- https://git.kernel.org/stable/c/df8aa4a09733c4d3974b1db32c1782b3aad3a151
- https://git.kernel.org/stable/c/0127f1c119bde40578f4d25f5d17333b4e75de8c
- https://git.kernel.org/stable/c/fd636a87161def6e35876ab7943641ce457974c8
- https://git.kernel.org/stable/c/ffa507f5f774cb4d45136b106989ebc051361263
- https://git.kernel.org/stable/c/cd2bcee450bc94770be56c0b896c1a1dc6838bd8
- https://git.kernel.org/stable/c/61a8d06600c8c397f9a7e01940479d4c94a82f5f
- https://git.kernel.org/stable/c/f25e93768fcc5d8287e50b1ec52a42e4c276df34
More Linux vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2021-02452 Incorrect authorization in Ubuntu linux kernel KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
Sources
- CVE-2026-89792 · CVE Program
- CVE-2026-89792 · NVD
- FIRST EPSS
- GHSA-5h65-jm98-j8f7 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-89792 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences