In the Linux kernel, the following vulnerability has been resolved:
KVM: s390: fix validity interception issue when gisa is switched off
We might run into a SIE validity if gisa has been disabled either via using kernel parameter "kvm.use_gisa=0" or by setting the related sysfs attribute to N (echo N >/sys/module/kvm/parameters/use_gisa).
The validity is caused by an invalid value in the SIE control block's gisa designation. That happens because we pass the uninitialized gisa origin to virt_to_phys() before writing it to the gisa designation.
To fix this we return 0 in kvm_s390_get_gisa_desc() if the origin is 0. kvm_s390_get_gisa_desc() is used to determine which gisa designation to set in the SIE control block. A value of 0 in the gisa designation disables gisa usage.
The issue surfaces in the host kernel with the following kernel message as soon a new kvm guest start is attemted.
kvm: unhandled validity intercept 0x1011 WARNING: CPU: 0 PID: 781237 at arch/s390/kvm/intercept.c:101 kvm_handle_sie_intercept+0x42e/0x4d0 [kvm] Modules linked in: vhost_net tap tun xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT xt_tcpudp nft_compat x_tables nf_nat_tftp nf_conntrack_tftp vfio_pci_core irqbypass vhost_vsock vmw_vsock_virtio_transport_common vsock vhost vhost_iotlb kvm nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables sunrpc mlx5_ib ib_uverbs ib_core mlx5_core uvdevice s390_trng eadm_sch vfio_ccw zcrypt_cex4 mdev vfio_iommu_type1 vfio sch_fq_codel drm i2c_core loop drm_panel_orientation_quirks configfs nfnetlink lcs ctcm fsm dm_service_time ghash_s390 prng chacha_s390 libchacha aes_s390 des_s390 libdes sha3_512_s390 sha3_256_s390 sha512_s390 sha256_s390 sha1_s390 sha_common dm_mirror dm_region_hash dm_log zfcp scsi_transport_fc scsi_dh_rdac scsi_dh_emc scsi_dh_alua pkey zcrypt dm_multipath rng_core autofs4 [last unloaded: vfio_pci] CPU: 0 PID: 781237 Comm: CPU 0/KVM Not tainted 6.10.0-08682-gcad9f11498ea #6 Hardware name: IBM 3931 A01 701 (LPAR) Krnl PSW : 0704c00180000000 000003d93deb0122 (kvm_handle_sie_intercept+0x432/0x4d0 [kvm]) R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3 Krnl GPRS: 000003d900000027 000003d900000023 0000000000000028 000002cd00000000 000002d063a00900 00000359c6daf708 00000000000bebb5 0000000000001eff 000002cfd82e9000 000002cfd80bc000 0000000000001011 000003d93deda412 000003ff8962df98 000003d93de77ce0 000003d93deb011e 00000359c6daf960 Krnl Code: 000003d93deb0112: c020fffe7259 larl %r2,000003d93de7e5c4 000003d93deb0118: c0e53fa8beac brasl %r14,000003d9bd3c7e70 #000003d93deb011e: af000000 mc 0,0 >000003d93deb0122: a728ffea lhi %r2,-22 000003d93deb0126: a7f4fe24 brc 15,000003d93deafd6e 000003d93deb012a: 9101f0b0 tm 176(%r15),1 000003d93deb012e: a774fe48 brc 7,000003d93deafdbe 000003d93deb0132: 40a0f0ae sth %r10,174(%r15) Call Trace: [<000003d93deb0122>] kvm_handle_sie_intercept+0x432/0x4d0 [kvm] ([<000003d93deb011e>] kvm_handle_sie_intercept+0x42e/0x4d0 [kvm]) [<000003d93deacc10>] vcpu_post_run+0x1d0/0x3b0 [kvm] [<000003d93deaceda>] __vcpu_run+0xea/0x2d0 [kvm] [<000003d93dead9da>] kvm_arch_vcpu_ioctl_run+0x16a/0x430 [kvm] [<000003d93de93ee0>] kvm_vcpu_ioctl+0x190/0x7c0 [kvm] [<000003d9bd728b4e>] vfs_ioctl+0x2e/0x70 [<000003d9bd72a092>] __s390x_sys_ioctl+0xc2/0xd0 [<000003d9be0e9222>] __do_syscall+0x1f2/0x2e0 [<000003d9be0f9a90>] system_call+0x70/0x98 Last Breaking-Event-Address: [<000003d9bd3c7f58>] __warn_printk+0xe8/0xf0
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 27, 2026 | Jul 27, 2026 |
| Redhat_linux | — | Upgrade kernelUpgrade kernel-rtNo solution exists | Dec 5, 2024 | Sep 4, 2024 |
| Suse | — | Upgrade reiserfs-kmp-defaultUpgrade cluster-md-kmp-defaultUpgrade kernel-symsUpgrade kselftests-kmp-defaultUpgrade kernel-source-vanillaUpgrade kernel-rt_debug-vdsoUpgrade kernel-azure-extraUpgrade kernel-syms-rtUpgrade kernel-obs-qaUpgrade kernel-default-baseUpgrade dtb-sprdUpgrade gfs2-kmp-64kbUpgrade kernel-macrosUpgrade kernel-default-extraUpgrade kernel-rt-vdsoUpgrade kselftests-kmp-rtUpgrade ocfs2-kmp-azureUpgrade dtb-apmUpgrade dtb-renesasUpgrade kernel-64kbUpgrade kernel-default-livepatchUpgrade kernel-docs-htmlUpgrade dlm-kmp-rtUpgrade kernel-rt-optionalUpgrade kernel-default-develUpgrade reiserfs-kmp-64kbUpgrade dtb-broadcomUpgrade kernel-defaultUpgrade dtb-hisiliconUpgrade dtb-amazonUpgrade kernel-source-rtUpgrade kernel-kvmsmall-vdsoUpgrade dtb-marvellUpgrade dtb-appleUpgrade dtb-amlogicUpgrade kernel-rt_debugUpgrade kernel-debugUpgrade kernel-rt_debug-livepatch-develUpgrade reiserfs-kmp-rtUpgrade dtb-socionextUpgrade kernel-azure-vdsoUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-debug-livepatch-develUpgrade kernel-64kb-optionalUpgrade cluster-md-kmp-64kbUpgrade kernel-debug-develUpgrade kernel-rt-livepatch-develUpgrade kernel-azureUpgrade kselftests-kmp-azureUpgrade kernel-64kb-livepatch-develUpgrade kernel-docsUpgrade gfs2-kmp-defaultUpgrade ocfs2-kmp-64kbUpgrade kernel-rt_debug-develUpgrade kernel-64kb-extraUpgrade dlm-kmp-azureUpgrade dtb-amdUpgrade kernel-default-livepatch-develUpgrade dlm-kmp-defaultUpgrade dtb-freescaleUpgrade kernel-azure-develUpgrade dtb-lgUpgrade cluster-md-kmp-rtUpgrade kernel-source-azureUpgrade kernel-develUpgrade kernel-64kb-develUpgrade dtb-qcomUpgrade kernel-azure-optionalUpgrade kernel-default-optionalUpgrade gfs2-kmp-azureUpgrade kernel-azure-livepatch-develUpgrade dtb-armUpgrade dtb-mediatekUpgrade reiserfs-kmp-azureUpgrade kernel-devel-rtUpgrade kernel-debug-vdsoUpgrade dtb-nvidiaUpgrade kernel-kvmsmallUpgrade kernel-rt-extraUpgrade kernel-rtUpgrade kernel-syms-azureUpgrade kernel-obs-buildUpgrade cluster-md-kmp-azureUpgrade dtb-caviumUpgrade kernel-zfcpdumpUpgrade dtb-xilinxUpgrade dtb-rockchipUpgrade gfs2-kmp-rtUpgrade kselftests-kmp-64kbUpgrade kernel-default-base-rebuildUpgrade dtb-alteraUpgrade dtb-allwinnerUpgrade dlm-kmp-64kbUpgrade ocfs2-kmp-rtUpgrade ocfs2-kmp-defaultUpgrade kernel-sourceUpgrade kernel-kvmsmall-develUpgrade kernel-devel-azureUpgrade dtb-exynosUpgrade kernel-rt-develUpgrade kernel-default-vdso | Dec 5, 2025 | Oct 8, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1020-azure-fdeUpgrade linux-image-6.8.0-1002-gkeopUpgrade linux-image-azure-fdeUpgrade linux-image-generic-lpaeUpgrade linux-image-gkeop-6.8Upgrade linux-image-6.8.0-1016-raspiUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1017-oracle-64kUpgrade linux-image-raspiUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-gkeopUpgrade linux-image-genericUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-1019-nvidia-64kUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-nvidiaUpgrade linux-image-generic-64kUpgrade linux-image-azureUpgrade linux-image-ibmUpgrade linux-image-6.8.0-1020-awsUpgrade linux-image-6.8.0-1015-gkeUpgrade linux-image-6.8.0-1017-ibmUpgrade linux-image-lowlatencyUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1018-oemUpgrade linux-image-lowlatency-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-oem-22.04bUpgrade linux-image-6.8.0-50-lowlatency-64kUpgrade linux-image-gcpUpgrade linux-image-6.8.0-1020-azureUpgrade linux-image-oem-22.04cUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-6.8.0-1019-nvidiaUpgrade linux-image-ibm-classicUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1017-oracleUpgrade linux-image-virtualUpgrade linux-image-6.8.0-50-generic-64kUpgrade linux-image-oem-22.04dUpgrade linux-image-6.8.0-1019-nvidia-lowlatencyUpgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-1019-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1019-gcpUpgrade linux-image-oracleUpgrade linux-image-awsUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oem-24.04aUpgrade linux-image-6.8.0-50-genericUpgrade linux-image-6.8.0-50-lowlatencyUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-gkeUpgrade linux-image-oracle-64kUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-kvm | Dec 13, 2024 | Sep 4, 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