In the Linux kernel, the following vulnerability has been resolved:
ip6_tunnel: make sure to pull inner header in __ip6_tnl_rcv()
syzbot found __ip6_tnl_rcv() could access unitiliazed data [1].
Call pskb_inet_may_pull() to fix this, and initialize ipv6h variable after this call as it can change skb->head.
[1] BUG: KMSAN: uninit-value in __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline] BUG: KMSAN: uninit-value in INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline] BUG: KMSAN: uninit-value in IP6_ECN_decapsulate+0x7df/0x1e50 include/net/inet_ecn.h:321 __INET_ECN_decapsulate include/net/inet_ecn.h:253 [inline] INET_ECN_decapsulate include/net/inet_ecn.h:275 [inline] IP6_ECN_decapsulate+0x7df/0x1e50 include/net/inet_ecn.h:321 ip6ip6_dscp_ecn_decapsulate+0x178/0x1b0 net/ipv6/ip6_tunnel.c:727 __ip6_tnl_rcv+0xd4e/0x1590 net/ipv6/ip6_tunnel.c:845 ip6_tnl_rcv+0xce/0x100 net/ipv6/ip6_tunnel.c:888 gre_rcv+0x143f/0x1870 ip6_protocol_deliver_rcu+0xda6/0x2a60 net/ipv6/ip6_input.c:438 ip6_input_finish net/ipv6/ip6_input.c:483 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] ip6_input+0x15d/0x430 net/ipv6/ip6_input.c:492 ip6_mc_input+0xa7e/0xc80 net/ipv6/ip6_input.c:586 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish+0x5db/0x870 net/ipv6/ip6_input.c:79 NF_HOOK include/linux/netfilter.h:314 [inline] ipv6_rcv+0xda/0x390 net/ipv6/ip6_input.c:310 __netif_receive_skb_one_core net/core/dev.c:5532 [inline] __netif_receive_skb+0x1a6/0x5a0 net/core/dev.c:5646 netif_receive_skb_internal net/core/dev.c:5732 [inline] netif_receive_skb+0x58/0x660 net/core/dev.c:5791 tun_rx_batched+0x3ee/0x980 drivers/net/tun.c:1555 tun_get_user+0x53af/0x66d0 drivers/net/tun.c:2002 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:2084 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x786/0x1200 fs/read_write.c:590 ksys_write+0x20f/0x4c0 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:652 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b
Uninit was created at: slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768 slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x5e9/0xb10 mm/slub.c:3523 kmalloc_reserve+0x13d/0x4a0 net/core/skbuff.c:560 __alloc_skb+0x318/0x740 net/core/skbuff.c:651 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0xc8/0xbd0 net/core/skbuff.c:6334 sock_alloc_send_pskb+0xa80/0xbf0 net/core/sock.c:2787 tun_alloc_skb drivers/net/tun.c:1531 [inline] tun_get_user+0x1e8a/0x66d0 drivers/net/tun.c:1846 tun_chr_write_iter+0x3af/0x5d0 drivers/net/tun.c:2048 call_write_iter include/linux/fs.h:2084 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0x786/0x1200 fs/read_write.c:590 ksys_write+0x20f/0x4c0 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __x64_sys_write+0x93/0xd0 fs/read_write.c:652 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x6d/0x140 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b
CPU: 0 PID: 5034 Comm: syz-executor331 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-develUpgrade kernel-livepatch-5.10.210-201.852Upgrade perfUpgrade kernelUpgrade kernel-headersUpgrade perf-debuginfoUpgrade kernel-toolsUpgrade python-perf-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade bpftool-debuginfoUpgrade bpftoolUpgrade python-perfUpgrade kernel-livepatch-5.15.149-99.161Upgrade kernel-debuginfoUpgrade kernel-tools-debuginfo | Jul 9, 2024 | Mar 18, 2024 |
| Amazon_linux_2023 | — | Upgrade kernel-libbpf-staticUpgrade kernel-modules-extra-commonUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-libbpf-develUpgrade kernel-headersUpgrade bpftool-debuginfoUpgrade kernel-debuginfoUpgrade kernelUpgrade perf-debuginfoUpgrade kernel-livepatch-6.1.77-99.164Upgrade kernel-toolsUpgrade python3-perfUpgrade kernel-modules-extraUpgrade bpftoolUpgrade kernel-develUpgrade perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-develUpgrade kernel-libbpfUpgrade python3-perf-debuginfoUpgrade kernel-tools-debuginfo | Feb 17, 2025 | Mar 18, 2024 |
| Debian | — | Upgrade linux | May 8, 2024 | Mar 18, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-toolsUpgrade python3-perfUpgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelists | Jul 16, 2024 | Mar 18, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade bpftoolUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-toolsUpgrade kernel-abi-stablelists | Jun 26, 2024 | Mar 18, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade bpftoolUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernel | Oct 8, 2024 | Mar 18, 2024 |
| Huawei Euleros 2_0_sp8 | — | Upgrade kernelUpgrade bpftoolUpgrade kernel-headersUpgrade python3-perfUpgrade kernel-tools-libsUpgrade python-perfUpgrade kernel-toolsUpgrade perfUpgrade kernel-devel | Jul 23, 2024 | Mar 18, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade kernelUpgrade kernel-toolsUpgrade python3-perfUpgrade kernel-tools-libs | Jul 17, 2024 | Mar 18, 2024 |
| Redhat_linux | — | Upgrade kernelUpgrade kernel-rtNo solution exists | Dec 5, 2024 | Mar 18, 2024 |
| Suse | — | Upgrade cluster-md-kmp-defaultUpgrade kernel-default-livepatchUpgrade dtb-appleUpgrade kernel-rt-extraUpgrade kernel-64kbUpgrade kernel-syms-azureUpgrade dtb-sprdUpgrade cluster-md-kmp-64kbUpgrade kernel-default-base-rebuildUpgrade dtb-marvellUpgrade kernel-rt_debugUpgrade dlm-kmp-defaultUpgrade kernel-rt_debug-vdsoUpgrade kernel-docs-htmlUpgrade kernel-debug-livepatch-develUpgrade kernel-azure-extraUpgrade kernel-azure-develUpgrade kernel-source-vanillaUpgrade dlm-kmp-rtUpgrade kernel-rtUpgrade kernel-azure-baseUpgrade kernel-64kb-extraUpgrade kernel-kvmsmall-livepatch-develUpgrade kernel-source-azureUpgrade kernel-rt-livepatch-develUpgrade dtb-amlogicUpgrade ocfs2-kmp-64kbUpgrade dtb-lgUpgrade dtb-amazonUpgrade dtb-broadcomUpgrade kernel-debug-vdsoUpgrade kernel-azure-vdsoUpgrade dtb-socionextUpgrade reiserfs-kmp-rtUpgrade dtb-freescaleUpgrade kernel-devel-azureUpgrade kernel-rt_debug-develUpgrade dtb-nvidiaUpgrade kernel-rt-optionalUpgrade kernel-source-rtUpgrade kernel-default-manUpgrade kernel-default-develUpgrade kernel-azure-livepatch-develUpgrade gfs2-kmp-defaultUpgrade reiserfs-kmp-64kbUpgrade kernel-syms-rtUpgrade kernel-obs-buildUpgrade kselftests-kmp-rtUpgrade kernel-rt-vdsoUpgrade kernel-kvmsmallUpgrade kselftests-kmp-azureUpgrade kernel-macrosUpgrade kernel-kvmsmall-vdsoUpgrade kernel-azure-optionalUpgrade kernel-azureUpgrade dtb-exynosUpgrade kernel-docsUpgrade cluster-md-kmp-azureUpgrade kernel-64kb-livepatch-develUpgrade kernel-develUpgrade ocfs2-kmp-defaultUpgrade dtb-caviumUpgrade kernel-sourceUpgrade kernel-debugUpgrade kernel-default-baseUpgrade dtb-qcomUpgrade kernel-default-optionalUpgrade dlm-kmp-azureUpgrade ocfs2-kmp-azureUpgrade kernel-default-vdsoUpgrade reiserfs-kmp-defaultUpgrade dtb-renesasUpgrade kernel-zfcpdumpUpgrade dtb-armUpgrade kernel-rt-develUpgrade kernel-default-extraUpgrade cluster-md-kmp-rtUpgrade kernel-symsUpgrade gfs2-kmp-rtUpgrade kselftests-kmp-defaultUpgrade dtb-rockchipUpgrade kernel-devel-rtUpgrade dtb-apmUpgrade kernel-debug-develUpgrade kernel-kvmsmall-develUpgrade dlm-kmp-64kbUpgrade gfs2-kmp-azureUpgrade dtb-mediatekUpgrade ocfs2-kmp-rtUpgrade kernel-rt_debug-livepatch-develUpgrade kselftests-kmp-64kbUpgrade kernel-64kb-optionalUpgrade dtb-xilinxUpgrade dtb-hisiliconUpgrade dtb-alteraUpgrade kernel-obs-qaUpgrade dtb-amdUpgrade kernel-rt-livepatchUpgrade reiserfs-kmp-azureUpgrade dtb-allwinnerUpgrade kernel-64kb-develUpgrade kernel-default-livepatch-develUpgrade gfs2-kmp-64kbUpgrade kernel-default | Jul 10, 2024 | Mar 18, 2024 |
| Ubuntu | — | Upgrade linux-image-intelUpgrade linux-image-5.4.0-1044-iotUpgrade linux-image-6.5.0-1017-laptopUpgrade linux-image-lowlatencyUpgrade linux-image-gcpUpgrade linux-image-oem-20.04cUpgrade linux-image-azureUpgrade linux-image-6.5.0-41-lowlatencyUpgrade linux-image-aws-hweUpgrade linux-image-6.5.0-1022-azure-fdeUpgrade linux-image-ibmUpgrade linux-image-5.4.0-1140-azureUpgrade linux-image-5.4.0-1054-xilinx-zynqmpUpgrade linux-image-generic-64kUpgrade linux-image-4.15.0-1136-oracleUpgrade linux-image-5.4.0-1135-awsUpgrade linux-image-5.4.0-200-genericUpgrade linux-image-4.15.0-230-genericUpgrade linux-image-4.15.0-230-lowlatencyUpgrade linux-image-nvidiaUpgrade linux-image-gke-5.15Upgrade linux-image-oem-22.04aUpgrade linux-image-oem-20.04bUpgrade linux-image-gkeopUpgrade linux-image-oem-22.04Upgrade linux-image-5.15.0-1059-gcpUpgrade linux-image-6.5.0-1021-awsUpgrade linux-image-oracle-lts-20.04Upgrade linux-image-oem-22.04cUpgrade linux-image-6.5.0-41-genericUpgrade linux-image-6.5.0-1024-oracle-64kUpgrade linux-image-intel-iotgUpgrade linux-image-raspi2Upgrade linux-image-nvidia-6.5Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-aws-lts-22.04Upgrade linux-image-gkeop-5.4Upgrade linux-image-azure-lts-22.04Upgrade linux-image-5.4.0-1123-kvmUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-raspiUpgrade linux-image-aws-lts-20.04Upgrade linux-image-azure-lts-18.04Upgrade linux-image-6.5.0-1015-starfiveUpgrade linux-image-5.15.0-1061-awsUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-starfiveUpgrade linux-image-5.15.0-106-generic-lpaeUpgrade linux-image-4.15.0-1167-gcpUpgrade linux-image-6.5.0-41-lowlatency-64kUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-5.4.0-1139-gcpUpgrade linux-image-ibm-lts-20.04Upgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-5.15.0-1054-nvidia-lowlatencyUpgrade linux-image-lowlatency-64kUpgrade linux-image-genericUpgrade linux-image-virtual-hwe-16.04Upgrade linux-image-gcp-lts-20.04Upgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-5.15.0-106-lowlatencyUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-generic-lpaeUpgrade linux-image-gcp-lts-18.04Upgrade linux-image-6.5.0-1024-oracleUpgrade linux-image-azure-lts-20.04Upgrade linux-image-azure-fdeUpgrade linux-image-6.5.0-1021-nvidia-64kUpgrade linux-image-4.15.0-1174-awsUpgrade linux-image-oem-osp1Upgrade linux-image-5.15.0-106-generic-64kUpgrade linux-image-azure-cvmUpgrade linux-image-oem-22.04dUpgrade linux-image-5.15.0-1054-raspiUpgrade linux-image-5.4.0-1082-ibmUpgrade linux-image-aws-lts-18.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-5.4.0-200-generic-lpaeUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-oem-22.04bUpgrade linux-image-6.5.0-1022-gcpUpgrade linux-image-bluefieldUpgrade linux-image-5.15.0-1058-gkeUpgrade linux-image-5.15.0-1044-gkeopUpgrade linux-image-5.15.0-1059-oracleUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-5.4.0-1119-raspiUpgrade linux-image-oracle-lts-18.04Upgrade linux-image-raspi-nolpaeUpgrade linux-image-6.5.0-1024-oemUpgrade linux-image-6.5.0-1022-azureUpgrade linux-image-5.4.0-1139-azureUpgrade linux-image-5.15.0-106-genericUpgrade linux-image-oem-20.04dUpgrade linux-image-5.15.0-1058-intel-iotgUpgrade linux-image-5.4.0-1102-gkeopUpgrade linux-image-generic-hwe-16.04Upgrade linux-image-nvidia-64k-6.5Upgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-6.5.0-1021-nvidiaUpgrade linux-image-5.4.0-200-lowlatencyUpgrade linux-image-lowlatency-hwe-16.04Upgrade linux-image-laptop-23.10Upgrade linux-image-virtual-hwe-18.04Upgrade linux-image-5.15.0-1063-azure-fdeUpgrade linux-image-gkeop-5.15Upgrade linux-image-kvmUpgrade linux-image-4.15.0-1157-kvmUpgrade linux-image-5.15.0-1054-nvidiaUpgrade linux-image-awsUpgrade linux-image-5.4.0-1134-oracleUpgrade linux-image-oem-20.04Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-6.5.0-1018-raspiUpgrade linux-image-5.15.0-106-lowlatency-64kUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-4.15.0-1182-azureUpgrade linux-image-6.5.0-41-generic-64kUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-generic-hwe-18.04Upgrade linux-image-5.4.0-1094-bluefieldUpgrade linux-image-oemUpgrade linux-image-5.15.0-1058-kvmUpgrade linux-image-oracle-64kUpgrade linux-image-5.15.0-1063-azureUpgrade linux-image-virtualUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-raspi-hwe-18.04Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-5.15.0-1057-intel-iotgUpgrade linux-image-gkeUpgrade linux-image-5.15.0-1054-ibmUpgrade linux-image-oracleUpgrade linux-image-generic-lpae-hwe-20.04 | May 17, 2024 | Mar 18, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Mar 18, 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