In the Linux kernel, the following vulnerability has been resolved:
scsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddress
Bug report and analysis from Ding Hui.
During iSCSI session logout, if another task accesses the shost ipaddress attr, we can get a KASAN UAF report like this:
[ 276.942144] BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x78/0xe0 [ 276.942535] Write of size 4 at addr ffff8881053b45b8 by task cat/4088 [ 276.943511] CPU: 2 PID: 4088 Comm: cat Tainted: G E 6.1.0-rc8+ #3 [ 276.943997] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020 [ 276.944470] Call Trace: [ 276.944943] <TASK> [ 276.945397] dump_stack_lvl+0x34/0x48 [ 276.945887] print_address_description.constprop.0+0x86/0x1e7 [ 276.946421] print_report+0x36/0x4f [ 276.947358] kasan_report+0xad/0x130 [ 276.948234] kasan_check_range+0x35/0x1c0 [ 276.948674] _raw_spin_lock_bh+0x78/0xe0 [ 276.949989] iscsi_sw_tcp_host_get_param+0xad/0x2e0 [iscsi_tcp] [ 276.951765] show_host_param_ISCSI_HOST_PARAM_IPADDRESS+0xe9/0x130 [scsi_transport_iscsi] [ 276.952185] dev_attr_show+0x3f/0x80 [ 276.953005] sysfs_kf_seq_show+0x1fb/0x3e0 [ 276.953401] seq_read_iter+0x402/0x1020 [ 276.954260] vfs_read+0x532/0x7b0 [ 276.955113] ksys_read+0xed/0x1c0 [ 276.955952] do_syscall_64+0x38/0x90 [ 276.956347] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 276.956769] RIP: 0033:0x7f5d3a679222 [ 276.957161] Code: c0 e9 b2 fe ff ff 50 48 8d 3d 32 c0 0b 00 e8 a5 fe 01 00 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 ec 28 48 89 54 24 [ 276.958009] RSP: 002b:00007ffc864d16a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 276.958431] RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 00007f5d3a679222 [ 276.958857] RDX: 0000000000020000 RSI: 00007f5d3a4fe000 RDI: 0000000000000003 [ 276.959281] RBP: 00007f5d3a4fe000 R08: 00000000ffffffff R09: 0000000000000000 [ 276.959682] R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000020000 [ 276.960126] R13: 0000000000000003 R14: 0000000000000000 R15: 0000557a26dada58 [ 276.960536] </TASK> [ 276.961357] Allocated by task 2209: [ 276.961756] kasan_save_stack+0x1e/0x40 [ 276.962170] kasan_set_track+0x21/0x30 [ 276.962557] __kasan_kmalloc+0x7e/0x90 [ 276.962923] __kmalloc+0x5b/0x140 [ 276.963308] iscsi_alloc_session+0x28/0x840 [scsi_transport_iscsi] [ 276.963712] iscsi_session_setup+0xda/0xba0 [libiscsi] [ 276.964078] iscsi_sw_tcp_session_create+0x1fd/0x330 [iscsi_tcp] [ 276.964431] iscsi_if_create_session.isra.0+0x50/0x260 [scsi_transport_iscsi] [ 276.964793] iscsi_if_recv_msg+0xc5a/0x2660 [scsi_transport_iscsi] [ 276.965153] iscsi_if_rx+0x198/0x4b0 [scsi_transport_iscsi] [ 276.965546] netlink_unicast+0x4d5/0x7b0 [ 276.965905] netlink_sendmsg+0x78d/0xc30 [ 276.966236] sock_sendmsg+0xe5/0x120 [ 276.966576] ____sys_sendmsg+0x5fe/0x860 [ 276.966923] ___sys_sendmsg+0xe0/0x170 [ 276.967300] __sys_sendmsg+0xc8/0x170 [ 276.967666] do_syscall_64+0x38/0x90 [ 276.968028] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 276.968773] Freed by task 2209: [ 276.969111] kasan_save_stack+0x1e/0x40 [ 276.969449] kasan_set_track+0x21/0x30 [ 276.969789] kasan_save_free_info+0x2a/0x50 [ 276.970146] __kasan_slab_free+0x106/0x190 [ 276.970470] __kmem_cache_free+0x133/0x270 [ 276.970816] device_release+0x98/0x210 [ 276.971145] kobject_cleanup+0x101/0x360 [ 276.971462] iscsi_session_teardown+0x3fb/0x530 [libiscsi] [ 276.971775] iscsi_sw_tcp_session_destroy+0xd8/0x130 [iscsi_tcp] [ 276.972143] iscsi_if_recv_msg+0x1bf1/0x2660 [scsi_transport_iscsi] [ 276.972485] iscsi_if_rx+0x198/0x4b0 [scsi_transport_iscsi] [ 276.972808] netlink_unicast+0x4d5/0x7b0 [ 276.973201] netlink_sendmsg+0x78d/0xc30 [ 276.973544] sock_sendmsg+0xe5/0x120 [ 276.973864] ____sys_sendmsg+0x5fe/0x860 [ 276.974248] ___sys_ ---truncated---
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-headersUpgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.10.236-227.928Upgrade perfUpgrade kernel-livepatch-4.14.355-276.639Upgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade python-perfUpgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade kernelUpgrade bpftool-debuginfoUpgrade kernel-devel | Apr 30, 2025 | Mar 27, 2025 |
| Amazon_linux | — | Upgrade kernel | May 22, 2025 | Mar 27, 2025 |
| Debian | — | Upgrade linux | Mar 31, 2025 | Mar 27, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade bpftoolUpgrade kernel-tools | Jul 1, 2025 | Mar 27, 2025 |
| Redhat_linux | — | Upgrade kernelNo solution existsUpgrade kernel-rt | Jul 9, 2025 | Mar 27, 2025 |
| Ubuntu | — | Upgrade linux-image-4.15.0-1176-gcpUpgrade linux-image-generic-lpaeUpgrade linux-image-5.4.0-1152-gcp-fipsUpgrade linux-image-4.15.0-1191-azureUpgrade linux-image-4.4.0-1147-kvmUpgrade linux-image-azure-5.4Upgrade linux-image-gkeUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-generic-lts-xenialUpgrade linux-image-lowlatencyUpgrade linux-image-5.4.0-1123-fipsUpgrade linux-image-generic-lpae-5.4Upgrade linux-image-gcp-4.15Upgrade linux-image-ibm-lts-20.04Upgrade linux-image-virtual-hwe-16.04Upgrade linux-image-4.15.0-240-genericUpgrade linux-image-5.4.0-220-generic-lpaeUpgrade linux-image-4.4.0-271-genericUpgrade linux-image-kvm-5.4Upgrade linux-image-bluefield-5.4Upgrade linux-image-aws-5.4Upgrade linux-image-fipsUpgrade linux-image-aws-fipsUpgrade linux-image-snapdragon-5.4Upgrade linux-image-generic-lts-raringUpgrade linux-image-gcp-fipsUpgrade linux-image-4.15.0-2100-azure-fipsUpgrade linux-image-aws-4.15Upgrade linux-image-azure-lts-20.04Upgrade linux-image-gcp-fips-5.4Upgrade linux-image-oemUpgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-5.4.0-220-genericUpgrade linux-image-5.4.0-1147-oracleUpgrade linux-image-oracleUpgrade linux-image-virtual-5.4Upgrade linux-image-aws-fips-5.4Upgrade linux-image-oracle-lts-20.04Upgrade linux-image-5.4.0-1152-gcpUpgrade linux-image-ibmUpgrade linux-image-5.4.0-1148-oracleUpgrade linux-image-4.15.0-1166-kvmUpgrade linux-image-5.4.0-1149-awsUpgrade linux-image-oracle-4.15Upgrade linux-image-5.4.0-1154-azureUpgrade linux-image-generic-lts-quantalUpgrade linux-image-gcp-fips-4.15Upgrade linux-image-lowlatency-hwe-16.04Upgrade linux-image-oracle-5.4Upgrade linux-image-aws-hweUpgrade linux-image-xilinx-zynqmp-5.4Upgrade linux-image-aws-lts-18.04Upgrade linux-image-generic-hwe-16.04Upgrade linux-image-lowlatency-5.4Upgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-5.4.0-1108-bluefieldUpgrade linux-image-bluefieldUpgrade linux-image-4.4.0-1184-awsUpgrade linux-image-generic-lts-trustyUpgrade linux-image-4.15.0-1145-oracleUpgrade linux-image-genericUpgrade linux-image-4.4.0-1116-fipsUpgrade linux-image-5.4.0-1155-azure-fipsUpgrade linux-image-gcp-5.4Upgrade linux-image-serverUpgrade linux-image-5.4.0-1053-iotUpgrade linux-image-virtualUpgrade linux-image-3.13.0-209-lowlatencyUpgrade linux-image-raspiUpgrade linux-image-4.15.0-2084-gcp-fipsUpgrade linux-image-gcp-lts-18.04Upgrade linux-image-4.15.0-2121-aws-fipsUpgrade linux-image-kvmUpgrade linux-image-azure-fipsUpgrade linux-image-virtual-hwe-18.04Upgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-aws-fips-4.15Upgrade linux-image-4.15.0-1138-fipsUpgrade linux-image-5.4.0-1132-raspiUpgrade linux-image-azure-lts-18.04Upgrade linux-image-4.15.0-1183-awsUpgrade linux-image-azure-4.15Upgrade linux-image-azure-fips-4.15Upgrade linux-image-virtual-lts-xenialUpgrade linux-image-5.4.0-1136-kvmUpgrade linux-image-azure-fips-5.4Upgrade linux-image-5.4.0-220-lowlatencyUpgrade linux-image-azureUpgrade linux-image-4.4.0-271-lowlatencyUpgrade linux-image-raspi-5.4Upgrade linux-image-ibm-5.4Upgrade linux-image-4.15.0-240-lowlatencyUpgrade linux-image-5.4.0-1095-ibmUpgrade linux-image-3.13.0-209-genericUpgrade linux-image-oracle-lts-18.04Upgrade linux-image-generic-5.4Upgrade linux-image-gcpUpgrade linux-image-raspi2Upgrade linux-image-5.4.0-1149-aws-fipsUpgrade linux-image-aws-lts-20.04Upgrade linux-image-5.4.0-1067-xilinx-zynqmpUpgrade linux-image-4.4.0-1146-awsUpgrade linux-image-fips-5.4Upgrade linux-image-generic-hwe-18.04Upgrade linux-image-generic-lts-saucyUpgrade linux-image-gcp-lts-20.04Upgrade linux-image-raspi-hwe-18.04Upgrade linux-image-oem-osp1Upgrade linux-image-aws | Apr 1, 2025 | Mar 27, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 10, 2025 | Mar 27, 2025 |
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