In the Linux kernel, the following vulnerability has been resolved:
regmap: Fix possible double-free in regcache_rbtree_exit()
In regcache_rbtree_insert_to_block(), when 'present' realloc failed, the 'blk' which is supposed to assign to 'rbnode->block' will be freed, so 'rbnode->block' points a freed memory, in the error handling path of regcache_rbtree_init(), 'rbnode->block' will be freed again in regcache_rbtree_exit(), KASAN will report double-free as follows:
BUG: KASAN: double-free or invalid-free in kfree+0xce/0x390 Call Trace: slab_free_freelist_hook+0x10d/0x240 kfree+0xce/0x390 regcache_rbtree_exit+0x15d/0x1a0 regcache_rbtree_init+0x224/0x2c0 regcache_init+0x88d/0x1310 __regmap_init+0x3151/0x4a80 __devm_regmap_init+0x7d/0x100 madera_spi_probe+0x10f/0x333 [madera_spi] spi_probe+0x183/0x210 really_probe+0x285/0xc30
To fix this, moving up the assignment of rbnode->block to immediately after the reallocation has succeeded so that the data structure stays valid even if the second reallocation fails.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftool-debuginfoUpgrade kernel-headersUpgrade perf-debuginfoUpgrade python-perfUpgrade kernelUpgrade kernel-livepatch-5.10.82-83.359Upgrade python-perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-livepatch-4.14.256-197.484Upgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-develUpgrade kernel-toolsUpgrade perfUpgrade bpftoolUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfoUpgrade kernel-devel | Feb 3, 2025 | May 22, 2024 |
| Amazon_linux | — | Upgrade kernel | Jan 31, 2025 | Feb 8, 2022 |
| Debian | — | Upgrade linux | Jul 30, 2024 | May 22, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade python3-perf | Oct 8, 2024 | May 22, 2024 |
| Huawei Euleros 2_0_sp8 | — | Upgrade kernel-develUpgrade bpftoolUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-toolsUpgrade python-perfUpgrade perfUpgrade kernel-headersUpgrade python3-perf | Jan 21, 2025 | May 22, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade python3-perfUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade kernel | Oct 8, 2024 | May 22, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 22, 2024 |
| Suse | — | Upgrade dtb-broadcomUpgrade kernel-azure-extraUpgrade kernel-rt_debugUpgrade dtb-apmUpgrade dtb-marvellUpgrade dlm-kmp-rtUpgrade dtb-socionextUpgrade kernel-rt_debug-vdsoUpgrade dtb-nvidiaUpgrade kernel-kvmsmall-vdsoUpgrade gfs2-kmp-64kbUpgrade dtb-armUpgrade gfs2-kmp-rtUpgrade cluster-md-kmp-64kbUpgrade kernel-debug-livepatch-develUpgrade kernel-kvmsmallUpgrade kernel-symsUpgrade cluster-md-kmp-defaultUpgrade kernel-defaultUpgrade kernel-default-manUpgrade kernel-64kb-optionalUpgrade dtb-hisiliconUpgrade kernel-docsUpgrade kselftests-kmp-rtUpgrade kernel-debug-develUpgrade reiserfs-kmp-rtUpgrade kernel-macrosUpgrade dtb-renesasUpgrade kernel-default-extraUpgrade kernel-default-livepatch-develUpgrade dtb-appleUpgrade kernel-azure-baseUpgrade kselftests-kmp-defaultUpgrade ocfs2-kmp-rtUpgrade kernel-azure-develUpgrade kernel-64kb-livepatch-develUpgrade kernel-rt-vdsoUpgrade kernel-docs-htmlUpgrade kernel-azure-vdsoUpgrade dlm-kmp-azureUpgrade kernel-syms-rtUpgrade dtb-amlogicUpgrade dlm-kmp-defaultUpgrade kernel-rt-livepatch-develUpgrade kernel-azure-livepatch-develUpgrade dtb-amdUpgrade kernel-default-baseUpgrade kernel-obs-qaUpgrade kernel-preemptUpgrade kernel-default-vdsoUpgrade kernel-azure-optionalUpgrade reiserfs-kmp-defaultUpgrade kernel-rt-livepatchUpgrade kernel-64kb-develUpgrade dtb-exynosUpgrade kernel-source-vanillaUpgrade kernel-default-livepatchUpgrade kernel-sourceUpgrade reiserfs-kmp-azureUpgrade dtb-mediatekUpgrade dtb-allwinnerUpgrade kernel-64kb-extraUpgrade kernel-zfcpdumpUpgrade kernel-rt-develUpgrade kselftests-kmp-azureUpgrade dtb-amazonUpgrade kernel-rtUpgrade kernel-obs-buildUpgrade kernel-develUpgrade ocfs2-kmp-azureUpgrade kselftests-kmp-64kbUpgrade kernel-rt_debug-develUpgrade kernel-default-base-rebuildUpgrade kernel-debugUpgrade dtb-alteraUpgrade dtb-sprdUpgrade cluster-md-kmp-azureUpgrade kernel-64kbUpgrade dlm-kmp-64kbUpgrade dtb-freescaleUpgrade kernel-default-develUpgrade ocfs2-kmp-defaultUpgrade kernel-rt-extraUpgrade gfs2-kmp-azureUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-default-optionalUpgrade dtb-xilinxUpgrade kernel-rt_debug-livepatch-develUpgrade dtb-caviumUpgrade kernel-syms-azureUpgrade cluster-md-kmp-rtUpgrade dtb-lgUpgrade ocfs2-kmp-64kbUpgrade kernel-azureUpgrade kernel-debug-vdsoUpgrade kernel-rt-optionalUpgrade kernel-kvmsmall-develUpgrade kernel-preempt-develUpgrade kernel-devel-azureUpgrade gfs2-kmp-defaultUpgrade reiserfs-kmp-64kbUpgrade kernel-devel-rtUpgrade dtb-qcomUpgrade dtb-rockchipUpgrade kernel-source-azureUpgrade kernel-source-rt | Aug 9, 2024 | May 22, 2024 |
| Ubuntu | — | Upgrade linux-image-lowlatencyUpgrade linux-image-4.4.0-1142-awsUpgrade linux-image-4.4.0-267-genericUpgrade linux-image-genericUpgrade linux-image-virtual-lts-xenialUpgrade linux-image-lowlatency-lts-xenialUpgrade linux-image-3.13.0-205-genericUpgrade linux-image-generic-lts-trustyUpgrade linux-image-kvmUpgrade linux-image-serverUpgrade linux-image-4.4.0-1180-awsUpgrade linux-image-3.13.0-205-lowlatencyUpgrade linux-image-4.4.0-267-lowlatencyUpgrade linux-image-awsUpgrade linux-image-4.4.0-1143-kvmUpgrade linux-image-4.4.0-1112-fipsUpgrade linux-image-generic-lts-xenialUpgrade linux-image-fipsUpgrade linux-image-virtual | Nov 19, 2024 | May 22, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | May 22, 2024 |
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