In the Linux kernel, the following vulnerability has been resolved:
s390/qeth: Fix kernel panic after setting hsuid
Symptom: When the hsuid attribute is set for the first time on an IQD Layer3 device while the corresponding network interface is already UP, the kernel will try to execute a napi function pointer that is NULL.
Example: --------------------------------------------------------------------------- [ 2057.572696] illegal operation: 0001 ilc:1 [#1] SMP [ 2057.572702] Modules linked in: af_iucv qeth_l3 zfcp scsi_transport_fc sunrpc nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nf_tables_set nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables libcrc32c nfnetlink ghash_s390 prng xts aes_s390 des_s390 de s_generic sha3_512_s390 sha3_256_s390 sha512_s390 vfio_ccw vfio_mdev mdev vfio_iommu_type1 eadm_sch vfio ext4 mbcache jbd2 qeth_l2 bridge stp llc dasd_eckd_mod qeth dasd_mod qdio ccwgroup pkey zcrypt [ 2057.572739] CPU: 6 PID: 60182 Comm: stress_client Kdump: loaded Not tainted 4.18.0-541.el8.s390x #1 [ 2057.572742] Hardware name: IBM 3931 A01 704 (LPAR) [ 2057.572744] Krnl PSW : 0704f00180000000 0000000000000002 (0x2) [ 2057.572748] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:3 PM:0 RI:0 EA:3 [ 2057.572751] Krnl GPRS: 0000000000000004 0000000000000000 00000000a3b008d8 0000000000000000 [ 2057.572754] 00000000a3b008d8 cb923a29c779abc5 0000000000000000 00000000814cfd80 [ 2057.572756] 000000000000012c 0000000000000000 00000000a3b008d8 00000000a3b008d8 [ 2057.572758] 00000000bab6d500 00000000814cfd80 0000000091317e46 00000000814cfc68 [ 2057.572762] Krnl Code:#0000000000000000: 0000 illegal >0000000000000002: 0000 illegal 0000000000000004: 0000 illegal 0000000000000006: 0000 illegal 0000000000000008: 0000 illegal 000000000000000a: 0000 illegal 000000000000000c: 0000 illegal 000000000000000e: 0000 illegal [ 2057.572800] Call Trace: [ 2057.572801] ([<00000000ec639700>] 0xec639700) [ 2057.572803] [<00000000913183e2>] net_rx_action+0x2ba/0x398 [ 2057.572809] [<0000000091515f76>] __do_softirq+0x11e/0x3a0 [ 2057.572813] [<0000000090ce160c>] do_softirq_own_stack+0x3c/0x58 [ 2057.572817] ([<0000000090d2cbd6>] do_softirq.part.1+0x56/0x60) [ 2057.572822] [<0000000090d2cc60>] __local_bh_enable_ip+0x80/0x98 [ 2057.572825] [<0000000091314706>] __dev_queue_xmit+0x2be/0xd70 [ 2057.572827] [<000003ff803dd6d6>] afiucv_hs_send+0x24e/0x300 [af_iucv] [ 2057.572830] [<000003ff803dd88a>] iucv_send_ctrl+0x102/0x138 [af_iucv] [ 2057.572833] [<000003ff803de72a>] iucv_sock_connect+0x37a/0x468 [af_iucv] [ 2057.572835] [<00000000912e7e90>] __sys_connect+0xa0/0xd8 [ 2057.572839] [<00000000912e9580>] sys_socketcall+0x228/0x348 [ 2057.572841] [<0000000091514e1a>] system_call+0x2a6/0x2c8 [ 2057.572843] Last Breaking-Event-Address: [ 2057.572844] [<0000000091317e44>] __napi_poll+0x4c/0x1d8 [ 2057.572846] [ 2057.572847] Kernel panic - not syncing: Fatal exception in interrupt -------------------------------------------------------------------------------------------
Analysis: There is one napi structure per out_q: card->qdio.out_qs[i].napi The napi.poll functions are set during qeth_open().
Since commit 1cfef80d4c2b ("s390/qeth: Don't call dev_close/dev_open (DOWN/UP)") qeth_set_offline()/qeth_set_online() no longer call dev_close()/ dev_open(). So if qeth_free_qdio_queues() cleared card->qdio.out_qs[i].napi.poll while the network interface was UP and the card was offline, they are not set again.
Reproduction: chzdev -e $devno layer2=0 ip link set dev $network_interface up echo 0 > /sys/bus/ccw ---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 |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | May 30, 2024 |
| Redhat_linux | — | Upgrade kernelUpgrade kernel-rt | Feb 10, 2025 | May 30, 2024 |
| Suse | — | Upgrade kernel-64kb-livepatch-develUpgrade kernel-azureUpgrade reiserfs-kmp-azureUpgrade dtb-renesasUpgrade dtb-nvidiaUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-rt-develUpgrade cluster-md-kmp-64kbUpgrade dtb-mediatekUpgrade dtb-lgUpgrade gfs2-kmp-defaultUpgrade dtb-armUpgrade kernel-sourceUpgrade kernel-debug-vdsoUpgrade dtb-hisiliconUpgrade kernel-azure-optionalUpgrade kernel-debugUpgrade kernel-64kb-develUpgrade dlm-kmp-64kbUpgrade kernel-default-optionalUpgrade kernel-default-livepatch-develUpgrade cluster-md-kmp-rtUpgrade kernel-rt_debug-develUpgrade kselftests-kmp-64kbUpgrade dtb-allwinnerUpgrade kernel-source-vanillaUpgrade kernel-symsUpgrade dtb-caviumUpgrade ocfs2-kmp-azureUpgrade dtb-xilinxUpgrade kernel-64kbUpgrade dtb-sprdUpgrade kernel-default-baseUpgrade kernel-default-vdsoUpgrade dtb-amdUpgrade dtb-exynosUpgrade kernel-develUpgrade dtb-qcomUpgrade gfs2-kmp-azureUpgrade kernel-64kb-optionalUpgrade kernel-source-azureUpgrade dtb-alteraUpgrade kernel-rt-livepatchUpgrade ocfs2-kmp-defaultUpgrade dlm-kmp-rtUpgrade kernel-devel-rtUpgrade dtb-rockchipUpgrade reiserfs-kmp-defaultUpgrade kernel-debug-develUpgrade kernel-64kb-extraUpgrade kernel-obs-qaUpgrade dtb-broadcomUpgrade dtb-amlogicUpgrade kernel-source-rtUpgrade kernel-debug-livepatch-develUpgrade kselftests-kmp-rtUpgrade dtb-marvellUpgrade dlm-kmp-defaultUpgrade kernel-rt-livepatch-develUpgrade kselftests-kmp-azureUpgrade kernel-rt-vdsoUpgrade kernel-defaultUpgrade kernel-default-base-rebuildUpgrade kernel-azure-develUpgrade kernel-macrosUpgrade kernel-kvmsmall-vdsoUpgrade kernel-kvmsmall-develUpgrade kernel-default-extraUpgrade kernel-azure-extraUpgrade gfs2-kmp-rtUpgrade gfs2-kmp-64kbUpgrade dtb-freescaleUpgrade cluster-md-kmp-defaultUpgrade cluster-md-kmp-azureUpgrade kernel-syms-azureUpgrade kernel-rt-extraUpgrade reiserfs-kmp-rtUpgrade ocfs2-kmp-rtUpgrade ocfs2-kmp-64kbUpgrade kselftests-kmp-defaultUpgrade kernel-zfcpdumpUpgrade kernel-rt_debugUpgrade kernel-rt-optionalUpgrade kernel-kvmsmallUpgrade dtb-appleUpgrade dtb-apmUpgrade dlm-kmp-azureUpgrade kernel-default-develUpgrade kernel-azure-vdsoUpgrade dtb-socionextUpgrade dtb-amazonUpgrade kernel-rtUpgrade kernel-obs-buildUpgrade kernel-default-livepatchUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-docs-htmlUpgrade reiserfs-kmp-64kbUpgrade kernel-rt_debug-vdsoUpgrade kernel-devel-azureUpgrade kernel-azure-livepatch-develUpgrade kernel-syms-rtUpgrade kernel-docs | Jun 13, 2024 | May 30, 2024 |
| Ubuntu | — | Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-40-generic-64kUpgrade linux-image-5.15.0-118-genericUpgrade linux-image-5.15.0-1067-awsUpgrade linux-image-oracleUpgrade linux-image-6.8.0-1011-nvidia-64kUpgrade linux-image-6.8.0-40-genericUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-raspiUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1012-azureUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-6.8.0-1009-raspiUpgrade linux-image-ibm-classicUpgrade linux-image-5.15.0-1062-nvidiaUpgrade linux-image-6.8.0-1008-gkeUpgrade linux-image-5.15.0-1050-gkeopUpgrade linux-image-5.15.0-1070-azureUpgrade linux-image-generic-lpaeUpgrade linux-image-5.15.0-118-generic-lpaeUpgrade linux-image-6.8.0-1010-oracle-64kUpgrade linux-image-6.8.0-1012-gcpUpgrade linux-image-6.8.0-1011-nvidiaUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-azure-cvmUpgrade linux-image-azureUpgrade linux-image-6.8.0-1010-oracleUpgrade linux-image-azure-fdeUpgrade linux-image-raspi-nolpaeUpgrade linux-image-5.15.0-1064-kvmUpgrade linux-image-nvidia-6.8Upgrade linux-image-5.15.0-1062-intel-iotgUpgrade linux-image-gke-5.15Upgrade linux-image-6.8.0-1013-awsUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-ibmUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-awsUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-6.8.0-1012-azure-fdeUpgrade linux-image-gkeop-5.15Upgrade linux-image-kvmUpgrade linux-image-6.8.0-40-lowlatencyUpgrade linux-image-oem-20.04dUpgrade linux-image-virtualUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-gkeopUpgrade linux-image-6.8.0-1010-ibmUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-5.15.0-1066-gcpUpgrade linux-image-6.8.0-1011-nvidia-lowlatency-64kUpgrade linux-image-oem-20.04bUpgrade linux-image-5.15.0-1064-gkeUpgrade linux-image-5.15.0-118-lowlatencyUpgrade linux-image-5.15.0-1060-ibmUpgrade linux-image-5.15.0-118-lowlatency-64kUpgrade linux-image-aws-lts-22.04Upgrade linux-image-oem-20.04cUpgrade linux-image-oem-20.04Upgrade linux-image-gkeUpgrade linux-image-intelUpgrade linux-image-oem-24.04aUpgrade linux-image-nvidiaUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-5.15.0-1035-xilinx-zynqmpUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-6.8.0-1010-oemUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-5.15.0-1062-nvidia-lowlatencyUpgrade linux-image-5.15.0-118-generic-64kUpgrade linux-image-5.15.0-1065-oracleUpgrade linux-image-generic-64kUpgrade linux-image-intel-iotgUpgrade linux-image-6.8.0-1011-nvidia-lowlatencyUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.15.0-1070-azure-fdeUpgrade linux-image-lowlatency-64kUpgrade linux-image-oracle-64kUpgrade linux-image-nvidia-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-genericUpgrade linux-image-gcpUpgrade linux-image-6.8.0-40-lowlatency-64kUpgrade linux-image-oem-24.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-5.15.0-1060-raspi | Aug 9, 2024 | May 30, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 14, 2025 | May 30, 2024 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub