In the Linux kernel, the following vulnerability has been resolved:
x86/alternatives: Disable KASAN in apply_alternatives()
Fei has reported that KASAN triggers during apply_alternatives() on a 5-level paging machine:
BUG: KASAN: out-of-bounds in rcu_is_watching() Read of size 4 at addr ff110003ee6419a0 by task swapper/0/0 ... __asan_load4() rcu_is_watching() trace_hardirqs_on() text_poke_early() apply_alternatives() ...
On machines with 5-level paging, cpu_feature_enabled(X86_FEATURE_LA57) gets patched. It includes KASAN code, where KASAN_SHADOW_START depends on __VIRTUAL_MASK_SHIFT, which is defined with cpu_feature_enabled().
KASAN gets confused when apply_alternatives() patches the KASAN_SHADOW_START users. A test patch that makes KASAN_SHADOW_START static, by replacing __VIRTUAL_MASK_SHIFT with 56, works around the issue.
Fix it for real by disabling KASAN while the kernel is patching alternatives.
[ mingo: updated the changelog ]
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-develUpgrade perfUpgrade kernel-toolsUpgrade perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade bpftoolUpgrade kernel-livepatch-5.15.136-90.144Upgrade python-perfUpgrade kernel-tools-debuginfoUpgrade kernel-tools-develUpgrade python-perf-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.10.199-190.747Upgrade kernel-headersUpgrade kernelUpgrade kernel-debuginfo | Jul 9, 2024 | Mar 2, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Mar 2, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade kernel | May 13, 2024 | Mar 2, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade bpftoolUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel | Jun 3, 2024 | Mar 2, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade bpftoolUpgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade python3-perf | Jul 1, 2024 | Mar 2, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade kernelUpgrade kernel-toolsUpgrade python3-perfUpgrade kernel-tools-libs | Jul 17, 2024 | Mar 2, 2024 |
| Suse | — | Upgrade ocfs2-kmp-azureUpgrade dtb-renesasUpgrade kernel-debugUpgrade kernel-default-baseUpgrade kernel-default-extraUpgrade ocfs2-kmp-64kbUpgrade kernel-rt_debugUpgrade kernel-rt_debug-develUpgrade dtb-amazonUpgrade dtb-amdUpgrade kernel-64kbUpgrade dtb-marvellUpgrade dtb-caviumUpgrade dtb-socionextUpgrade gfs2-kmp-rtUpgrade kernel-64kb-optionalUpgrade kernel-rt-optionalUpgrade reiserfs-kmp-64kbUpgrade dtb-amlogicUpgrade kernel-azure-vdsoUpgrade kernel-source-vanillaUpgrade kernel-azureUpgrade kernel-rt-livepatch-develUpgrade kernel-default-livepatch-develUpgrade kernel-macrosUpgrade dtb-appleUpgrade kernel-kvmsmallUpgrade kernel-kvmsmall-vdsoUpgrade kernel-debug-develUpgrade dlm-kmp-64kbUpgrade ocfs2-kmp-rtUpgrade kernel-kvmsmall-develUpgrade kernel-debug-livepatch-develUpgrade kernel-source-rtUpgrade kernel-default-livepatchUpgrade kernel-obs-qaUpgrade kernel-syms-rtUpgrade dtb-hisiliconUpgrade kernel-rt-vdsoUpgrade kernel-default-develUpgrade kernel-zfcpdumpUpgrade kselftests-kmp-64kbUpgrade dtb-freescaleUpgrade kernel-kvmsmall-livepatch-develUpgrade dlm-kmp-defaultUpgrade kselftests-kmp-azureUpgrade reiserfs-kmp-rtUpgrade gfs2-kmp-azureUpgrade kernel-azure-extraUpgrade dtb-broadcomUpgrade kernel-azure-optionalUpgrade kernel-rt_debug-vdsoUpgrade kernel-64kb-livepatch-develUpgrade kernel-sourceUpgrade gfs2-kmp-64kbUpgrade kernel-source-azureUpgrade cluster-md-kmp-azureUpgrade dtb-alteraUpgrade dtb-lgUpgrade kernel-docs-htmlUpgrade reiserfs-kmp-defaultUpgrade kernel-symsUpgrade dtb-apmUpgrade dtb-armUpgrade gfs2-kmp-defaultUpgrade ocfs2-kmp-defaultUpgrade kernel-debug-vdsoUpgrade kernel-azure-develUpgrade kernel-rt-livepatchUpgrade kernel-devel-rtUpgrade dtb-sprdUpgrade kernel-syms-azureUpgrade dtb-exynosUpgrade kernel-develUpgrade dtb-allwinnerUpgrade reiserfs-kmp-azureUpgrade kernel-docsUpgrade dtb-qcomUpgrade kernel-default-vdsoUpgrade cluster-md-kmp-64kbUpgrade kernel-obs-buildUpgrade kselftests-kmp-rtUpgrade kernel-rt-extraUpgrade kernel-devel-azureUpgrade dtb-rockchipUpgrade kernel-azure-livepatch-develUpgrade kernel-rt_debug-livepatch-develUpgrade dlm-kmp-azureUpgrade cluster-md-kmp-rtUpgrade cluster-md-kmp-defaultUpgrade kernel-rt-develUpgrade kernel-rtUpgrade dtb-nvidiaUpgrade dtb-mediatekUpgrade kernel-default-optionalUpgrade kernel-64kb-develUpgrade dlm-kmp-rtUpgrade kselftests-kmp-defaultUpgrade kernel-64kb-extraUpgrade dtb-xilinxUpgrade kernel-defaultUpgrade kernel-default-base-rebuild | Apr 17, 2024 | Mar 2, 2024 |
| Ubuntu | — | Upgrade linux-image-5.4.0-1038-iotUpgrade linux-image-5.4.0-1073-ibmUpgrade linux-image-gkeopUpgrade linux-image-awsUpgrade linux-image-5.4.0-186-generic-lpaeUpgrade linux-image-oem-osp1Upgrade linux-image-5.4.0-1093-gkeopUpgrade linux-image-5.4.0-1110-raspiUpgrade linux-image-bluefieldUpgrade linux-image-gcp-lts-20.04Upgrade linux-image-kvmUpgrade linux-image-5.4.0-1086-bluefieldUpgrade linux-image-lowlatencyUpgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-generic-lpaeUpgrade linux-image-raspi2Upgrade linux-image-oracleUpgrade linux-image-ibmUpgrade linux-image-azure-lts-20.04Upgrade linux-image-virtualUpgrade linux-image-generic-hwe-18.04Upgrade linux-image-gcpUpgrade linux-image-5.4.0-1114-kvmUpgrade linux-image-5.4.0-186-genericUpgrade linux-image-azureUpgrade linux-image-aws-lts-20.04Upgrade linux-image-5.4.0-186-lowlatencyUpgrade linux-image-genericUpgrade linux-image-virtual-hwe-18.04Upgrade linux-image-5.4.0-1131-azureUpgrade linux-image-gkeop-5.4Upgrade linux-image-ibm-lts-20.04Upgrade linux-image-raspiUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-raspi-hwe-18.04Upgrade linux-image-5.4.0-1125-oracleUpgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-5.4.0-1130-gcpUpgrade linux-image-5.4.0-1126-awsUpgrade linux-image-oracle-lts-20.04Upgrade linux-image-5.4.0-1045-xilinx-zynqmpUpgrade linux-image-oem | Jul 15, 2024 | Mar 2, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Mar 2, 2024 |
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