In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix OOBs when building SMB2_IOCTL request
When using encryption, either enforced by the server or when using 'seal' mount option, the client will squash all compound request buffers down for encryption into a single iov in smb2_set_next_command().
SMB2_ioctl_init() allocates a small buffer (448 bytes) to hold the SMB2_IOCTL request in the first iov, and if the user passes an input buffer that is greater than 328 bytes, smb2_set_next_command() will end up writing off the end of @rqst->iov[0].iov_base as shown below:
mount.cifs //srv/share /mnt -o ...,seal ln -s $(perl -e "print('a')for 1..1024") /mnt/link
BUG: KASAN: slab-out-of-bounds in smb2_set_next_command.cold+0x1d6/0x24c [cifs] Write of size 4116 at addr ffff8881148fcab8 by task ln/859
CPU: 1 UID: 0 PID: 859 Comm: ln Not tainted 6.12.0-rc3 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-2.fc40 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x5d/0x80 ? smb2_set_next_command.cold+0x1d6/0x24c [cifs] print_report+0x156/0x4d9 ? smb2_set_next_command.cold+0x1d6/0x24c [cifs] ? __virt_addr_valid+0x145/0x310 ? __phys_addr+0x46/0x90 ? smb2_set_next_command.cold+0x1d6/0x24c [cifs] kasan_report+0xda/0x110 ? smb2_set_next_command.cold+0x1d6/0x24c [cifs] kasan_check_range+0x10f/0x1f0 __asan_memcpy+0x3c/0x60 smb2_set_next_command.cold+0x1d6/0x24c [cifs] smb2_compound_op+0x238c/0x3840 [cifs] ? kasan_save_track+0x14/0x30 ? kasan_save_free_info+0x3b/0x70 ? vfs_symlink+0x1a1/0x2c0 ? do_symlinkat+0x108/0x1c0 ? __pfx_smb2_compound_op+0x10/0x10 [cifs] ? kmem_cache_free+0x118/0x3e0 ? cifs_get_writable_path+0xeb/0x1a0 [cifs] smb2_get_reparse_inode+0x423/0x540 [cifs] ? __pfx_smb2_get_reparse_inode+0x10/0x10 [cifs] ? rcu_is_watching+0x20/0x50 ? __kmalloc_noprof+0x37c/0x480 ? smb2_create_reparse_symlink+0x257/0x490 [cifs] ? smb2_create_reparse_symlink+0x38f/0x490 [cifs] smb2_create_reparse_symlink+0x38f/0x490 [cifs] ? __pfx_smb2_create_reparse_symlink+0x10/0x10 [cifs] ? find_held_lock+0x8a/0xa0 ? hlock_class+0x32/0xb0 ? __build_path_from_dentry_optional_prefix+0x19d/0x2e0 [cifs] cifs_symlink+0x24f/0x960 [cifs] ? __pfx_make_vfsuid+0x10/0x10 ? __pfx_cifs_symlink+0x10/0x10 [cifs] ? make_vfsgid+0x6b/0xc0 ? generic_permission+0x96/0x2d0 vfs_symlink+0x1a1/0x2c0 do_symlinkat+0x108/0x1c0 ? __pfx_do_symlinkat+0x10/0x10 ? strncpy_from_user+0xaa/0x160 __x64_sys_symlinkat+0xb9/0xf0 do_syscall_64+0xbb/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f08d75c13bb
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 |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-tools-develUpgrade kernel-livepatch-5.10.228-219.884Upgrade kernel-livepatch-5.10.230-223.885Upgrade kernel-livepatch-5.15.173-118.169Upgrade bpftoolUpgrade kernel-tools-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernelUpgrade kernel-headersUpgrade perfUpgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-livepatch-5.10.227-219.884Upgrade python-perfUpgrade kernel-toolsUpgrade kernel-debuginfo-common-x86_64 | Jan 22, 2025 | Nov 7, 2024 |
| Amazon_linux_2023 | — | Upgrade perfUpgrade perf-debuginfoUpgrade kernel-toolsUpgrade kernel-modules-extraUpgrade kernel-livepatch-6.1.115-126.197Upgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel-develUpgrade kernel-headersUpgrade kernel-tools-develUpgrade python3-perfUpgrade bpftoolUpgrade kernelUpgrade python3-perf-debuginfoUpgrade kernel-livepatch-6.1.112-124.190Upgrade kernel-libbpfUpgrade kernel-modules-extra-commonUpgrade kernel-tools-debuginfoUpgrade kernel-libbpf-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfo | Feb 17, 2025 | Nov 7, 2024 |
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Nov 11, 2024 | Nov 7, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade python3-perfUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-tools-libsUpgrade kernel-tools | Feb 11, 2025 | Nov 7, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade bpftoolUpgrade python3-perfUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-abi-stablelists | Feb 11, 2025 | Nov 7, 2024 |
| Oracle_linux | — | Upgrade kernel-uek | Dec 17, 2024 | Nov 7, 2024 |
| Redhat_linux | — | No solution existsUpgrade kernelUpgrade kernel-rt | May 15, 2025 | Nov 7, 2024 |
| Ubuntu | — | Upgrade linux-image-oracleUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-6.11.0-1010-lowlatency-64kUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-5.4.0-1142-awsUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-5.15.0-1072-nvidiaUpgrade linux-image-5.15.0-1077-gcpUpgrade linux-image-6.8.0-58-genericUpgrade linux-image-generic-hwe-18.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-1024-oracle-64kUpgrade linux-image-gkeop-5.15Upgrade linux-image-5.15.0-134-genericUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-5.4.0-1129-raspiUpgrade linux-image-6.8.0-1010-gkeopUpgrade linux-image-gcp-lts-24.04Upgrade linux-image-oracle-64kUpgrade linux-image-5.15.0-1044-xilinx-zynqmpUpgrade linux-image-6.8.0-1023-gkeUpgrade linux-image-5.4.0-208-genericUpgrade linux-image-5.15.0-1072-nvidia-lowlatencyUpgrade linux-image-5.4.0-1116-fipsUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-aws-lts-22.04Upgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-gcp-64kUpgrade linux-image-6.8.0-58-lowlatency-64kUpgrade linux-image-6.8.0-1024-ibmUpgrade linux-image-5.4.0-1145-azureUpgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-6.8.0-58-generic-64kUpgrade linux-image-oem-20.04dUpgrade linux-image-oem-22.04bUpgrade linux-image-raspi-nolpaeUpgrade linux-image-virtual-hwe-18.04Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-5.15.0-1070-ibmUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-5.15.0-1075-gkeUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-aws-lts-20.04Upgrade linux-image-6.8.0-1027-awsUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-bluefieldUpgrade linux-image-5.15.0-1081-azureUpgrade linux-image-6.8.0-1026-nvidia-64kUpgrade linux-image-aws-lts-24.04Upgrade linux-image-5.4.0-1140-awsUpgrade linux-image-oem-22.04dUpgrade linux-image-5.4.0-1099-bluefieldUpgrade linux-image-raspi-hwe-18.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-virtualUpgrade linux-image-6.11.0-1010-lowlatencyUpgrade linux-image-6.11.0-1011-oracleUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-5.15.0-133-generic-lpaeUpgrade linux-image-6.8.0-1026-oemUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-oem-24.04aUpgrade linux-image-gcpUpgrade linux-image-6.8.0-1014-azure-nvidiaUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-oem-osp1Upgrade linux-image-awsUpgrade linux-image-5.15.0-133-generic-64kUpgrade linux-image-6.11.0-1015-oemUpgrade linux-image-raspi2Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-kvmUpgrade linux-image-azure-fdeUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-5.4.0-208-generic-lpaeUpgrade linux-image-realtimeUpgrade linux-image-5.15.0-134-generic-64kUpgrade linux-image-5.15.0-134-generic-lpaeUpgrade linux-image-5.4.0-1048-iotUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-5.15.0-1060-gkeopUpgrade linux-image-5.15.0-1074-ibmUpgrade linux-image-5.15.0-133-lowlatencyUpgrade linux-image-6.8.0-1027-azure-fdeUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-azure-cvmUpgrade linux-image-6.8.0-1028-gcp-64kUpgrade linux-image-5.15.0-1075-oracleUpgrade linux-image-5.15.0-1078-awsUpgrade linux-image-5.15.0-1021-nvidia-tegra-igxUpgrade linux-image-oem-22.04cUpgrade linux-image-gkeopUpgrade linux-image-5.15.0-133-lowlatency-64kUpgrade linux-image-6.8.0-1026-nvidia-lowlatency-64kUpgrade linux-image-5.15.0-1080-awsUpgrade linux-image-6.11.0-1009-azureUpgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-ibm-classicUpgrade linux-image-5.15.0-1081-azure-fdeUpgrade linux-image-oem-22.04aUpgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-5.15.0-1076-kvmUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-6.8.0-1024-oracleUpgrade linux-image-generic-64kUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-azureUpgrade linux-image-intelUpgrade linux-image-ibm-lts-20.04Upgrade linux-image-6.11.0-1009-gcpUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.11.0-18-genericUpgrade linux-image-genericUpgrade linux-image-5.4.0-1127-kvmUpgrade linux-image-azure-nvidiaUpgrade linux-image-lowlatency-64kUpgrade linux-image-azure-lts-22.04Upgrade linux-image-6.8.0-1026-nvidiaUpgrade linux-image-6.11.0-1009-azure-fdeUpgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-nvidiaUpgrade linux-image-5.15.0-1072-raspiUpgrade linux-image-6.11.0-1008-raspiUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-oem-20.04cUpgrade linux-image-gke-5.15Upgrade linux-image-6.8.1-1020-realtimeUpgrade linux-image-oem-24.04Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-oem-24.04bUpgrade linux-image-5.4.0-1058-xilinx-zynqmpUpgrade linux-image-oemUpgrade linux-image-raspiUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.11.0-1011-oracle-64kUpgrade linux-image-6.11.0-1009-awsUpgrade linux-image-6.8.0-1027-azureUpgrade linux-image-6.11.0-1005-realtimeUpgrade linux-image-6.8.0-58-lowlatencyUpgrade linux-image-ibmUpgrade linux-image-5.4.0-208-lowlatencyUpgrade linux-image-5.15.0-1033-nvidia-tegra-rtUpgrade linux-image-lowlatencyUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-5.4.0-1138-oracleUpgrade linux-image-5.15.0-1033-nvidia-tegraUpgrade linux-image-oem-20.04bUpgrade linux-image-5.15.0-1021-nvidia-tegra-igx-rtUpgrade linux-image-gkeop-6.8Upgrade linux-image-5.15.0-1073-intel-iotgUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-generic-lpaeUpgrade linux-image-oracle-lts-20.04Upgrade linux-image-azure-lts-20.04Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-nvidia-tegraUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1026-nvidia-lowlatencyUpgrade linux-image-5.4.0-1086-ibmUpgrade linux-image-intel-iotgUpgrade linux-image-5.15.0-133-genericUpgrade linux-image-oem-20.04Upgrade linux-image-azure-lts-24.04Upgrade linux-image-gcp-lts-20.04Upgrade linux-image-6.8.0-1028-gcpUpgrade linux-image-5.4.0-1143-gcpUpgrade linux-image-fipsUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-6.11.0-18-generic-64kUpgrade linux-image-gke | Feb 20, 2025 | Nov 7, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 22, 2025 | Nov 7, 2024 |
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