mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate()
Priority LOW 30CWE-125Published · 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
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate() Although it is guided that `#mbox-cells` must be at least 1, there are many instances of `#mbox-cells = <0>;` in the device tree. If that is the case and the corresponding mailbox controller does not provide `fw_xlate` and of_xlate` function pointers, `fw_mbox_index_xlate()` will be used by default and out-of-bounds accesses could occur due to lack of bounds check in that function.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00119 1st percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.258, 5.15.209, 6.1.167 +5Red Hat: 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 3.18 and later | 5.10.258, 5.15.209, 6.1.167, 6.6.130, 6.12.77, 6.18.16, 6.19.6, 7.0 | Patch available | CNA |
- Linux VendorLinux Affected 3.18 and later Fixed in 5.10.258, 5.15.209, 6.1.167, 6.6.130, 6.12.77, 6.18.16, 6.19.6, 7.0 Patch available CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 3.18.1 to before 6.1.167; 6.2 to before 6.6.130; 6.7 to before 6.12.77; 6.13 to before 6.18.16; 6.19 to before 6.19.6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.18:-:*:*:*:*:*:* | 3.18 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.18:rc2:*:*:*:*:*:* | 3.18 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.18:rc3:*:*:*:*:*:* | 3.18 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.18:rc4:*:*:*:*:*:* | 3.18 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.18:rc5:*:*:*:*:*:* | 3.18 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.18:rc6:*:*:*:*:*:* | 3.18 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:3.18:rc7:*:*:*:*:*:* | 3.18 rc7 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.18.1 to before 6.1.167; 6.2 to before 6.6.130; 6.7 to before 6.12.77; 6.13 to before 6.18.16; 6.19 to before 6.19.6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.18:-:*:*:*:*:*:* Versions 3.18 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.18:rc2:*:*:*:*:*:* Versions 3.18 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.18:rc3:*:*:*:*:*:* Versions 3.18 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.18:rc4:*:*:*:*:*:* Versions 3.18 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.18:rc5:*:*:*:*:*:* Versions 3.18 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.18:rc6:*:*:*:*:*:* Versions 3.18 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:3.18:rc7:*:*:*:*:*:* Versions 3.18 rc7 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.258, 5.15.209, 6.1.167, 6.6.130, 6.12.77, 6.18.16, 6.19.6, 7.0
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2026-43281
- 2026-10-03 Alias added: GHSA-78gq-46gf-2hpp
- 2026-11-06 CISA SSVC decision points changed
References
Patch 6
- https://git.kernel.org/stable/c/2662ed331a69c0b551f78af58f12eb629a89a36f
- https://git.kernel.org/stable/c/31c4c67dec3362094a6747a171a4848e98542265
- https://git.kernel.org/stable/c/01d9a8c2615d436b2b30c19c1afe9fcd5726ff6d
- https://git.kernel.org/stable/c/4caae8168d1b808c7d4ff481295292e3f97f90fb
- https://git.kernel.org/stable/c/f50b39fd7c72a8734153644ee945ca0d8b2e65ab
- https://git.kernel.org/stable/c/fcd7f96c783626c07ee3ed75fa3739a8a2052310
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- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable 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
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2026-43281 · CVE Program
- CVE-2026-43281 · NVD
- FIRST EPSS
- GHSA-78gq-46gf-2hpp · GitHub Advisory Database · CC BY 4.0
- CVE-2026-43281 · 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