In the Linux kernel, the following vulnerability has been resolved:
udmabuf: validate ubuf->pagecount
Syzbot has reported GPF in sg_alloc_append_table_from_pages(). The problem was in ubuf->pages == ZERO_PTR.
ubuf->pagecount is calculated from arguments passed from user-space. If user creates udmabuf with list.size == 0 then ubuf->pagecount will be also equal to zero; it causes kmalloc_array() to return ZERO_PTR.
Fix it by validating ubuf->pagecount before passing it to kmalloc_array().
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-gcp-5.4Upgrade linuxUpgrade linux-oracle-5.4Upgrade linux-gkeUpgrade linux-gcpUpgrade linux-ibm-5.4Upgrade linux-fipsUpgrade linux-intel-iotgUpgrade linux-awsUpgrade linux-azure-fipsUpgrade linux-gcp-fipsUpgrade linux-oracleUpgrade linux-azure-5.4Upgrade linux-lowlatency-hwe-5.15Upgrade linux-hwe-5.4Upgrade linux-iotUpgrade linux-raspi-5.4Upgrade linux-aws-fipsUpgrade linux-azure-5.15Upgrade linux-realtimeUpgrade linux-raspiUpgrade linux-kvmUpgrade linux-ibmUpgrade linux-azureUpgrade linux-lowlatencyUpgrade linux-hwe-5.15Upgrade linux-bluefieldUpgrade linux-aws-5.4Upgrade linux-intel-iotg-5.15 | Mar 3, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
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