In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix use-after-free of signing key
Customers have reported use-after-free in @ses->auth_key.response with SMB2.1 + sign mounts which occurs due to following race:
task A task B cifs_mount() dfs_mount_share() get_session() cifs_mount_get_session() cifs_send_recv() cifs_get_smb_ses() compound_send_recv() cifs_setup_session() smb2_setup_request() kfree_sensitive() smb2_calc_signature() crypto_shash_setkey() *UAF*
Fix this by ensuring that we have a valid @ses->auth_key.response by checking whether @ses->ses_status is SES_GOOD or SES_EXITING with @ses->ses_lock held. After commit 24a9799aa8ef ("smb: client: fix UAF in smb2_reconnect_server()"), we made sure to call ->logoff() only when @ses was known to be good (e.g. valid ->auth_key.response), so it's safe to access signing key when @ses->ses_status == SES_EXITING.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-develUpgrade perf-debuginfoUpgrade kernel-debuginfoUpgrade perfUpgrade kernel-tools-debuginfoUpgrade kernel-livepatch-4.14.355-275.603Upgrade kernel-debuginfo-common-aarch64Upgrade kernelUpgrade kernel-tools-develUpgrade bpftoolUpgrade kernel-livepatch-5.10.236-228.935Upgrade python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade kernel-livepatch-5.15.178-120.187Upgrade kernel-headersUpgrade python-perfUpgrade kernel-livepatch-5.10.234-225.921Upgrade kernel-debuginfo-common-x86_64 | Mar 14, 2025 | Dec 27, 2024 |
| Amazon_linux | — | Upgrade kernel | Mar 18, 2025 | Dec 27, 2024 |
| Amazon_linux_2023 | — | Upgrade kernel-debuginfoUpgrade kernel-livepatch-6.1.130-139.222Upgrade kernel-debuginfo-common-x86_64Upgrade perf-debuginfoUpgrade kernel-libbpfUpgrade kernel-headersUpgrade kernel-modules-extraUpgrade kernel-libbpf-staticUpgrade kernelUpgrade perfUpgrade kernel-tools-develUpgrade kernel-libbpf-develUpgrade kernel-toolsUpgrade python3-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade python3-perfUpgrade bpftoolUpgrade bpftool-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-modules-extra-common | Mar 27, 2025 | Dec 27, 2024 |
| Debian | — | Upgrade linux | May 15, 2025 | Dec 27, 2024 |
| Dell Powerstore Dsa2025223 | — | Upgrade Dell PowerStoreOS to the latest version | Oct 23, 2025 | May 27, 2025 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernel-toolsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernelUpgrade kernel-abi-stablelists | Apr 11, 2025 | Dec 27, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernelUpgrade python3-perf | Mar 19, 2025 | Dec 27, 2024 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade bpftoolUpgrade kernelUpgrade python3-perf | Apr 1, 2025 | Dec 27, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Dec 27, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1028-nvidia-lowlatencyUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-6.11.0-1011-lowlatencyUpgrade linux-image-6.8.0-1029-azure-fdeUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.11.0-21-genericUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-6.11.0-1011-gcp-64kUpgrade linux-image-awsUpgrade linux-image-6.8.0-60-genericUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-oracleUpgrade linux-image-6.11.0-1017-oemUpgrade linux-image-6.8.0-1026-ibmUpgrade linux-image-azure-fdeUpgrade linux-image-gkeop-6.8Upgrade linux-image-generic-lpaeUpgrade linux-image-6.11.0-1010-raspiUpgrade linux-image-realtimeUpgrade linux-image-6.8.0-1026-oracle-64kUpgrade linux-image-6.11.0-1011-lowlatency-64kUpgrade linux-image-6.11.0-1011-awsUpgrade linux-image-virtualUpgrade linux-image-6.8.0-1028-oemUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-kvmUpgrade linux-image-nvidia-6.8Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.0-60-lowlatency-64kUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-60-generic-64kUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1025-gkeUpgrade linux-image-6.11.0-1012-azureUpgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-oem-24.04bUpgrade linux-image-6.11.0-1012-azure-fdeUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-oem-22.04bUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-genericUpgrade linux-image-6.8.0-1028-nvidia-64kUpgrade linux-image-6.8.0-1029-azureUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.8.0-1030-gcp-64kUpgrade linux-image-azureUpgrade linux-image-oem-22.04Upgrade linux-image-azure-nvidiaUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-nvidia-64kUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1028-nvidiaUpgrade linux-image-6.8.0-1012-gkeopUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.11.0-1011-gcpUpgrade linux-image-gkeopUpgrade linux-image-gcp-64kUpgrade linux-image-6.11.0-21-generic-64kUpgrade linux-image-nvidiaUpgrade linux-image-oem-24.04aUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-ibmUpgrade linux-image-aws-lts-24.04Upgrade linux-image-6.8.0-1028-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1026-oracleUpgrade linux-image-6.8.0-60-lowlatencyUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-1029-awsUpgrade linux-image-6.11.0-1013-oracle-64kUpgrade linux-image-ibm-classicUpgrade linux-image-6.8.1-1022-realtimeUpgrade linux-image-oem-22.04cUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-gkeUpgrade linux-image-gcpUpgrade linux-image-azure-lts-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-lowlatency-64kUpgrade linux-image-6.8.0-1016-azure-nvidiaUpgrade linux-image-6.11.0-1007-realtimeUpgrade linux-image-6.11.0-1013-oracleUpgrade linux-image-6.8.0-1030-gcpUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oem-22.04aUpgrade linux-image-oem-22.04dUpgrade linux-image-oracle-64kUpgrade linux-image-raspi | Mar 28, 2025 | Dec 27, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 2, 2025 | Dec 27, 2024 |
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