scsi: pm80xx: Fix array-index-out-of-of-bounds on rmmod
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: pm80xx: Fix array-index-out-of-of-bounds on rmmod Since commit f7b705c238d1 ("scsi: pm80xx: Set phy_attached to zero when device is gone") UBSAN reports: UBSAN: array-index-out-of-bounds in drivers/scsi/pm8001/pm8001_sas.c:786:17 index 28 is out of range for type 'pm8001_phy [16]' on rmmod when using an expander. For a direct attached device, attached_phy contains the local phy id. For a device behind an expander, attached_phy contains the remote phy id, not the local phy id. I.e. while pm8001_ha will have pm8001_ha->chip->n_phy local phys, for a device behind an expander, attached_phy can be much larger than pm8001_ha->chip->n_phy (depending on the amount of phys of the expander). E.g. on my system pm8001_ha has 8 phys with phy ids 0-7. One of the ports has an expander connected. The expander has 31 phys with phy ids 0-30. The pm8001_ha->phy array only contains the phys of the HBA. It does not contain the phys of the expander. Thus, it is wrong to use attached_phy to index the pm8001_ha->phy array for a device behind an expander. Thus, we can only clear phy_attached for devices that are directly attached.
Why it matters now
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 | 5.4.293 to before 5.4.301; 5.10.237 to before 5.10.246; 5.15.181 to before 5.15.195; 6.1.136 to before 6.1.156; 6.6.89 to before 6.6.112; 6.12.26 to before 6.12.53; 6.14.5 to before 6.15 | 5.4.301, 5.10.246, 5.15.195, 6.1.156, 6.6.112, 6.12.53, 6.15 | Patch available | CNA |
| Linux | Linux | 6.15 and later | 5.4.301, 5.10.246, 5.15.195, 6.1.156, 6.6.112, 6.12.53, 6.17.3, 6.18 | Patch available | CNA |
- Linux VendorLinux Affected 5.4.293 to before 5.4.301; 5.10.237 to before 5.10.246; 5.15.181 to before 5.15.195; 6.1.136 to before 6.1.156; 6.6.89 to before 6.6.112; 6.12.26 to before 6.12.53; 6.14.5 to before 6.15 Fixed in 5.4.301, 5.10.246, 5.15.195, 6.1.156, 6.6.112, 6.12.53, 6.15 Patch available CNA
- Linux VendorLinux Affected 6.15 and later Fixed in 5.4.301, 5.10.246, 5.15.195, 6.1.156, 6.6.112, 6.12.53, 6.17.3, 6.18 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.301, 5.10.246, 5.15.195, 6.1.156, 6.6.112, 6.12.53, 6.15
- Fix · CNA Linux (Linux) Fixed in 5.4.301, 5.10.246, 5.15.195, 6.1.156, 6.6.112, 6.12.53, 6.17.3, 6.18
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
Not affected: 4 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2025-40118
- 2026-10-03 Alias added: GHSA-fwp3-pc57-cmgf
References
Other 8
- https://git.kernel.org/stable/c/d94be0a6ae9ade706d4270e740bdb4f79953a7fc
- https://git.kernel.org/stable/c/45acbf154befedd9bc135f5e031fe7855d1e6493
- https://git.kernel.org/stable/c/eef5ef400893f8e3dbb09342583be0cdc716d566
- https://git.kernel.org/stable/c/9c671d4dbfbfb0d73cfdfb706afb36d9ad60a582
- https://git.kernel.org/stable/c/e62251954a128a2d0fcbc19e5fa39e08935bb628
- https://git.kernel.org/stable/c/9326a1541e1b7ed3efdbab72061b82cf01c6477a
- https://git.kernel.org/stable/c/83ced3c206c292458e47c7fac54223abc7141585
- https://git.kernel.org/stable/c/251be2f6037fb7ab399f68cd7428ff274133d693
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Sources
- CVE-2025-40118 · CVE Program
- CVE-2025-40118 · NVD
- FIRST EPSS
- GHSA-fwp3-pc57-cmgf · GitHub Advisory Database · CC BY 4.0
- CVE-2025-40118 · 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