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 bpftool-debuginfoUpgrade kernel-livepatch-4.14.355-276.639Upgrade kernel-develUpgrade python-perfUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade bpftoolUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-toolsUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.10.236-227.928Upgrade perfUpgrade kernel-tools-debuginfoUpgrade perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-tools-develUpgrade kernel-headers | 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-abi-stablelistsUpgrade kernel-tools-libsUpgrade bpftoolUpgrade python3-perfUpgrade 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-raspi-hwe-18.04Upgrade linux-image-azure-fipsUpgrade linux-image-ibm-5.4Upgrade linux-image-5.4.0-1136-kvmUpgrade linux-image-fips-5.4Upgrade linux-image-raspiUpgrade linux-image-oem-osp1Upgrade linux-image-5.4.0-1053-iotUpgrade linux-image-5.4.0-1132-raspiUpgrade linux-image-4.15.0-240-lowlatencyUpgrade linux-image-raspi2Upgrade linux-image-4.4.0-1146-awsUpgrade linux-image-4.15.0-2084-gcp-fipsUpgrade linux-image-gcp-lts-20.04Upgrade linux-image-azure-4.15Upgrade linux-image-3.13.0-209-lowlatencyUpgrade linux-image-4.4.0-271-lowlatencyUpgrade linux-image-4.4.0-1116-fipsUpgrade linux-image-4.15.0-2121-aws-fipsUpgrade linux-image-5.4.0-220-lowlatencyUpgrade linux-image-oracle-lts-18.04Upgrade linux-image-gcpUpgrade linux-image-kvmUpgrade linux-image-azure-fips-5.4Upgrade linux-image-azure-fips-4.15Upgrade linux-image-awsUpgrade linux-image-5.4.0-1155-azure-fipsUpgrade linux-image-5.4.0-1149-aws-fipsUpgrade linux-image-raspi-5.4Upgrade linux-image-generic-hwe-18.04Upgrade linux-image-gcp-lts-18.04Upgrade linux-image-3.13.0-209-genericUpgrade linux-image-virtual-hwe-18.04Upgrade linux-image-azureUpgrade linux-image-5.4.0-1067-xilinx-zynqmpUpgrade linux-image-aws-fips-4.15Upgrade linux-image-4.15.0-1138-fipsUpgrade linux-image-virtual-lts-xenialUpgrade linux-image-aws-lts-20.04Upgrade linux-image-4.15.0-1183-awsUpgrade linux-image-5.4.0-1095-ibmUpgrade linux-image-azure-lts-18.04Upgrade linux-image-generic-5.4Upgrade linux-image-virtualUpgrade linux-image-generic-lts-saucyUpgrade linux-image-gcp-5.4Upgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-serverUpgrade linux-image-4.15.0-2100-azure-fipsUpgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-4.15.0-240-genericUpgrade linux-image-gcp-4.15Upgrade linux-image-oemUpgrade linux-image-azure-lts-20.04Upgrade linux-image-bluefield-5.4Upgrade linux-image-aws-5.4Upgrade linux-image-oracleUpgrade linux-image-aws-fipsUpgrade linux-image-lowlatency-hwe-16.04Upgrade linux-image-oracle-5.4Upgrade linux-image-lowlatency-5.4Upgrade linux-image-generic-hwe-16.04Upgrade linux-image-bluefieldUpgrade linux-image-aws-lts-18.04Upgrade linux-image-xilinx-zynqmp-5.4Upgrade linux-image-aws-hweUpgrade linux-image-genericUpgrade linux-image-5.4.0-1148-oracleUpgrade linux-image-4.15.0-1191-azureUpgrade linux-image-ibm-lts-20.04Upgrade linux-image-5.4.0-220-generic-lpaeUpgrade linux-image-generic-lpaeUpgrade linux-image-virtual-hwe-16.04Upgrade linux-image-4.4.0-271-genericUpgrade linux-image-5.4.0-1108-bluefieldUpgrade linux-image-4.4.0-1184-awsUpgrade linux-image-generic-lts-trustyUpgrade linux-image-4.15.0-1176-gcpUpgrade linux-image-4.15.0-1145-oracleUpgrade linux-image-5.4.0-1154-azureUpgrade linux-image-generic-lts-quantalUpgrade linux-image-ibmUpgrade linux-image-gkeUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-oracle-lts-20.04Upgrade linux-image-generic-lts-xenialUpgrade linux-image-virtual-5.4Upgrade linux-image-5.4.0-1123-fipsUpgrade linux-image-4.15.0-1166-kvmUpgrade linux-image-azure-5.4Upgrade linux-image-lowlatencyUpgrade linux-image-4.4.0-1147-kvmUpgrade linux-image-gcp-fips-5.4Upgrade linux-image-snapdragon-5.4Upgrade linux-image-generic-lts-raringUpgrade linux-image-gcp-fips-4.15Upgrade linux-image-5.4.0-1152-gcp-fipsUpgrade linux-image-aws-fips-5.4Upgrade linux-image-fipsUpgrade linux-image-generic-lpae-5.4Upgrade linux-image-gcp-fipsUpgrade linux-image-5.4.0-1149-awsUpgrade linux-image-oracle-4.15Upgrade linux-image-5.4.0-1147-oracleUpgrade linux-image-5.4.0-220-genericUpgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-kvm-5.4Upgrade linux-image-5.4.0-1152-gcpUpgrade linux-image-aws-4.15 | 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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