In the Linux kernel, the following vulnerability has been resolved:
tun: avoid double free in tun_free_netdev
Avoid double free in tun_free_netdev() by moving the dev->tstats and tun->security allocs to a new ndo_init routine (tun_net_init()) that will be called by register_netdevice(). ndo_init is paired with the desctructor (tun_free_netdev()), so if there's an error in register_netdevice() the destructor will handle the frees.
BUG: KASAN: double-free or invalid-free in selinux_tun_dev_free_security+0x1a/0x20 security/selinux/hooks.c:5605
CPU: 0 PID: 25750 Comm: syz-executor416 Not tainted 5.16.0-rc2-syzk #1 Hardware name: Red Hat KVM, BIOS Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x89/0xb5 lib/dump_stack.c:106 print_address_description.constprop.9+0x28/0x160 mm/kasan/report.c:247 kasan_report_invalid_free+0x55/0x80 mm/kasan/report.c:372 ____kasan_slab_free mm/kasan/common.c:346 [inline] __kasan_slab_free+0x107/0x120 mm/kasan/common.c:374 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook mm/slub.c:1749 [inline] slab_free mm/slub.c:3513 [inline] kfree+0xac/0x2d0 mm/slub.c:4561 selinux_tun_dev_free_security+0x1a/0x20 security/selinux/hooks.c:5605 security_tun_dev_free_security+0x4f/0x90 security/security.c:2342 tun_free_netdev+0xe6/0x150 drivers/net/tun.c:2215 netdev_run_todo+0x4df/0x840 net/core/dev.c:10627 rtnl_unlock+0x13/0x20 net/core/rtnetlink.c:112 __tun_chr_ioctl+0x80c/0x2870 drivers/net/tun.c:3302 tun_chr_ioctl+0x2f/0x40 drivers/net/tun.c:3311 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x19d/0x220 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3a/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade perfUpgrade python-perfUpgrade perf-debuginfoUpgrade kernel-tools-develUpgrade python-perf-debuginfoUpgrade kernel-toolsUpgrade kernel-headersUpgrade kernelUpgrade bpftool-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade bpftoolUpgrade kernel-livepatch-5.10.144-127.601Upgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-debuginfo | Aug 2, 2024 | Mar 4, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Mar 4, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernelUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade kernel-abi-stablelists | May 13, 2024 | Mar 4, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernelUpgrade python3-perfUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libs | Jun 3, 2024 | Mar 4, 2024 |
| Huawei Euleros 2_0_sp8 | — | Upgrade kernel-toolsUpgrade bpftoolUpgrade kernel-develUpgrade perfUpgrade python-perfUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernel-headersUpgrade kernel | Jul 23, 2024 | Mar 4, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade python3-perfUpgrade kernel-toolsUpgrade kernelUpgrade kernel-tools-libs | Jul 17, 2024 | Mar 4, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Mar 4, 2024 |
| Suse | — | Upgrade kernel-rt-livepatch-develUpgrade kernel-rt-optionalUpgrade kernel-macrosUpgrade dlm-kmp-azureUpgrade kernel-debug-develUpgrade kernel-defaultUpgrade kernel-64kbUpgrade kernel-source-rtUpgrade kernel-default-baseUpgrade kernel-kvmsmall-develUpgrade kselftests-kmp-rtUpgrade dtb-socionextUpgrade dtb-broadcomUpgrade kernel-devel-azureUpgrade dtb-appleUpgrade kernel-azure-develUpgrade kselftests-kmp-azureUpgrade kernel-kvmsmallUpgrade dlm-kmp-defaultUpgrade kernel-azure-vdsoUpgrade kernel-source-vanillaUpgrade reiserfs-kmp-rtUpgrade kernel-azure-extraUpgrade kernel-obs-buildUpgrade kernel-debug-livepatch-develUpgrade kselftests-kmp-defaultUpgrade cluster-md-kmp-azureUpgrade kernel-obs-qaUpgrade kernel-azureUpgrade reiserfs-kmp-64kbUpgrade dtb-freescaleUpgrade gfs2-kmp-rtUpgrade kernel-rt-extraUpgrade dtb-amdUpgrade kernel-docsUpgrade kernel-default-develUpgrade kernel-default-livepatchUpgrade kernel-rt_debug-develUpgrade dtb-amazonUpgrade dtb-apmUpgrade kernel-syms-rtUpgrade kernel-docs-htmlUpgrade kernel-debug-vdsoUpgrade cluster-md-kmp-defaultUpgrade kernel-rt-vdsoUpgrade ocfs2-kmp-64kbUpgrade kernel-rt_debugUpgrade kernel-rt_debug-vdsoUpgrade dtb-marvellUpgrade kernel-azure-livepatch-develUpgrade dtb-amlogicUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-default-extraUpgrade kernel-kvmsmall-vdsoUpgrade dtb-mediatekUpgrade kernel-default-vdsoUpgrade dtb-hisiliconUpgrade dtb-allwinnerUpgrade dtb-renesasUpgrade dtb-caviumUpgrade kernel-debugUpgrade kernel-symsUpgrade kernel-64kb-optionalUpgrade dtb-alteraUpgrade ocfs2-kmp-defaultUpgrade kernel-syms-azureUpgrade reiserfs-kmp-azureUpgrade cluster-md-kmp-64kbUpgrade gfs2-kmp-defaultUpgrade kernel-64kb-develUpgrade dtb-xilinxUpgrade kernel-sourceUpgrade kernel-azure-optionalUpgrade kernel-default-optionalUpgrade kernel-rt-livepatchUpgrade dlm-kmp-64kbUpgrade kernel-zfcpdumpUpgrade kernel-preempt-develUpgrade kernel-default-base-rebuildUpgrade reiserfs-kmp-defaultUpgrade kernel-preemptUpgrade dlm-kmp-rtUpgrade dtb-rockchipUpgrade kernel-64kb-extraUpgrade kselftests-kmp-64kbUpgrade kernel-devel-rtUpgrade kernel-rt_debug-livepatch-develUpgrade kernel-develUpgrade gfs2-kmp-64kbUpgrade dtb-sprdUpgrade kernel-64kb-livepatch-develUpgrade kernel-rtUpgrade cluster-md-kmp-rtUpgrade kernel-default-livepatch-develUpgrade dtb-lgUpgrade kernel-source-azureUpgrade ocfs2-kmp-azureUpgrade dtb-armUpgrade gfs2-kmp-azureUpgrade kernel-rt-develUpgrade dtb-nvidiaUpgrade ocfs2-kmp-rtUpgrade dtb-exynosUpgrade dtb-qcom | Aug 9, 2024 | Mar 4, 2024 |
| Ubuntu | — | Upgrade linux-image-4.15.0-1138-oracleUpgrade linux-image-oemUpgrade linux-image-4.15.0-1176-awsUpgrade linux-image-4.15.0-232-lowlatencyUpgrade linux-image-gkeUpgrade linux-image-4.15.0-1159-kvmUpgrade linux-image-4.15.0-1169-gcpUpgrade linux-image-aws-lts-18.04Upgrade linux-image-aws-hweUpgrade linux-image-4.15.0-1184-azureUpgrade linux-image-lowlatency-hwe-16.04Upgrade linux-image-oracle-lts-18.04Upgrade linux-image-azureUpgrade linux-image-kvmUpgrade linux-image-gcp-lts-18.04Upgrade linux-image-genericUpgrade linux-image-generic-hwe-16.04Upgrade linux-image-4.15.0-232-genericUpgrade linux-image-virtualUpgrade linux-image-oracleUpgrade linux-image-lowlatencyUpgrade linux-image-gcpUpgrade linux-image-azure-lts-18.04Upgrade linux-image-virtual-hwe-16.04 | Nov 19, 2024 | Mar 4, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Mar 4, 2024 |
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