In the Linux kernel, the following vulnerability has been resolved:
scsi: lpfc: Fix use-after-free KFENCE violation during sysfs firmware write
During the sysfs firmware write process, a use-after-free read warning is logged from the lpfc_wr_object() routine:
BUG: KFENCE: use-after-free read in lpfc_wr_object+0x235/0x310 [lpfc] Use-after-free read at 0x0000000000cf164d (in kfence-#111): lpfc_wr_object+0x235/0x310 [lpfc] lpfc_write_firmware.cold+0x206/0x30d [lpfc] lpfc_sli4_request_firmware_update+0xa6/0x100 [lpfc] lpfc_request_firmware_upgrade_store+0x66/0xb0 [lpfc] kernfs_fop_write_iter+0x121/0x1b0 new_sync_write+0x11c/0x1b0 vfs_write+0x1ef/0x280 ksys_write+0x5f/0xe0 do_syscall_64+0x59/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd
The driver accessed wr_object pointer data, which was initialized into mailbox payload memory, after the mailbox object was released back to the mailbox pool.
Fix by moving the mailbox free calls to the end of the routine ensuring that we don't reference internal mailbox memory after release.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Sep 18, 2025 | Sep 18, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernelUpgrade python3-perfUpgrade kernel-tools-libs | Mar 17, 2026 | Mar 17, 2026 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade python3-perfUpgrade kernel | Mar 17, 2026 | Mar 17, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-abi-stablelistsUpgrade kernelUpgrade python3-perfUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-tools-libs | Feb 3, 2026 | Feb 2, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 16, 2025 |
| Ubuntu | — | Upgrade linux-intel-iotg-5.15Upgrade linux-awsUpgrade linux-kvmUpgrade linux-oracleUpgrade linux-gkeUpgrade linux-raspiUpgrade linux-lowlatencyUpgrade linux-oracle-5.15Upgrade linux-realtimeUpgrade linux-lowlatency-hwe-5.15Upgrade linux-azureUpgrade linux-gcp-5.15Upgrade linux-aws-5.15Upgrade linux-hwe-5.15Upgrade linux-riscv-5.15Upgrade linux-intel-iotgUpgrade linux-nvidia-tegraUpgrade linux-gkeopUpgrade linux-gcpUpgrade linux-nvidia-tegra-5.15Upgrade linuxUpgrade linux-bluefieldUpgrade linux-ibmUpgrade linux-intel-iot-realtimeUpgrade linux-azure-5.15Upgrade linux-nvidia | Sep 19, 2025 | Sep 17, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Feb 9, 2026 | Sep 16, 2025 |
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