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 kernel-azureUpgrade kernel-debug-develUpgrade kernel-kvmsmall-vdsoUpgrade dlm-kmp-azureUpgrade kernel-kvmsmall-livepatch-develUpgrade dtb-freescaleUpgrade kernel-default-baseUpgrade dtb-broadcomUpgrade kernel-default-develUpgrade dtb-sprdUpgrade cluster-md-kmp-64kbUpgrade kernel-macrosUpgrade dtb-amazonUpgrade gfs2-kmp-64kbUpgrade reiserfs-kmp-64kbUpgrade kernel-defaultUpgrade dtb-socionextUpgrade kernel-default-livepatch-develUpgrade kernel-rt-livepatch-develUpgrade kernel-rt-optionalUpgrade dtb-hisiliconUpgrade kernel-source-rtUpgrade dlm-kmp-rtUpgrade kernel-default-livepatchUpgrade kernel-docsUpgrade reiserfs-kmp-defaultUpgrade dtb-amdUpgrade reiserfs-kmp-rtUpgrade kernel-rt_debugUpgrade kselftests-kmp-defaultUpgrade kernel-64kb-livepatch-develUpgrade cluster-md-kmp-defaultUpgrade dtb-marvellUpgrade kernel-obs-qaUpgrade kernel-64kb-optionalUpgrade kernel-debug-livepatch-develUpgrade kernel-azure-extraUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-64kbUpgrade kernel-rt_debug-develUpgrade kernel-syms-rtUpgrade kernel-64kb-extraUpgrade kernel-rt_debug-vdsoUpgrade kernel-symsUpgrade dtb-amlogicUpgrade dtb-appleUpgrade kernel-source-vanillaUpgrade kselftests-kmp-azureUpgrade kselftests-kmp-rtUpgrade ocfs2-kmp-azureUpgrade kernel-debugUpgrade kernel-docs-htmlUpgrade ocfs2-kmp-64kbUpgrade dlm-kmp-defaultUpgrade gfs2-kmp-defaultUpgrade dtb-renesasUpgrade kernel-azure-vdsoUpgrade kernel-default-extraUpgrade kernel-rt-vdsoUpgrade dtb-apmUpgrade cluster-md-kmp-azureUpgrade kernel-default-base-rebuildUpgrade dlm-kmp-64kbUpgrade dtb-alteraUpgrade dtb-allwinnerUpgrade kernel-obs-buildUpgrade kernel-kvmsmall-develUpgrade kernel-devel-azureUpgrade ocfs2-kmp-rtUpgrade ocfs2-kmp-defaultUpgrade kernel-syms-azureUpgrade kernel-sourceUpgrade dtb-caviumUpgrade kernel-default-vdsoUpgrade kernel-azure-develUpgrade dtb-lgUpgrade dtb-armUpgrade kselftests-kmp-64kbUpgrade kernel-rt-develUpgrade kernel-default-optionalUpgrade gfs2-kmp-azureUpgrade kernel-azure-optionalUpgrade kernel-azure-livepatch-develUpgrade kernel-zfcpdumpUpgrade gfs2-kmp-rtUpgrade dtb-xilinxUpgrade dtb-rockchipUpgrade kernel-64kb-develUpgrade kernel-develUpgrade dtb-qcomUpgrade kernel-rtUpgrade cluster-md-kmp-rtUpgrade kernel-source-azureUpgrade kernel-devel-rtUpgrade reiserfs-kmp-azureUpgrade kernel-rt-extraUpgrade kernel-debug-vdsoUpgrade dtb-nvidiaUpgrade dtb-mediatekUpgrade kernel-kvmsmallUpgrade dtb-exynos | Dec 5, 2025 | Oct 8, 2024 |
| Ubuntu | — | Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-nvidiaUpgrade linux-image-generic-64kUpgrade linux-image-6.8.0-1019-nvidiaUpgrade linux-image-azureUpgrade linux-image-gcpUpgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-1020-awsUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1017-ibmUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1017-oracle-64kUpgrade linux-image-6.8.0-1015-gkeUpgrade linux-image-6.8.0-1002-gkeopUpgrade linux-image-ibmUpgrade linux-image-oem-22.04aUpgrade linux-image-oem-22.04bUpgrade linux-image-lowlatencyUpgrade linux-image-lowlatency-64kUpgrade linux-image-gkeop-6.8Upgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1020-azureUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-raspiUpgrade linux-image-gkeopUpgrade linux-image-6.8.0-1016-raspiUpgrade linux-image-6.8.0-50-lowlatency-64kUpgrade linux-image-genericUpgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1018-oemUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-6.8.0-1019-nvidia-64kUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1020-azure-fdeUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-50-lowlatencyUpgrade linux-image-oem-24.04aUpgrade linux-image-nvidia-64kUpgrade linux-image-6.8.0-1019-gcpUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-virtualUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oem-24.04Upgrade linux-image-6.8.0-1019-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-50-generic-64kUpgrade linux-image-6.8.0-1017-oracleUpgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-oracle-64kUpgrade linux-image-gkeUpgrade linux-image-6.8.0-50-genericUpgrade linux-image-6.8.0-1019-nvidia-lowlatencyUpgrade linux-image-oracleUpgrade linux-image-awsUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-oem-22.04dUpgrade linux-image-kvm | Dec 13, 2024 | Sep 4, 2024 |
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