In the Linux kernel, the following vulnerability has been resolved:
net: add vlan_get_protocol_and_depth() helper
Before blamed commit, pskb_may_pull() was used instead of skb_header_pointer() in __vlan_get_protocol() and friends.
Few callers depended on skb->head being populated with MAC header, syzbot caught one of them (skb_mac_gso_segment())
Add vlan_get_protocol_and_depth() to make the intent clearer and use it where sensible.
This is a more generic fix than commit e9d3f80935b6 ("net/af_packet: make sure to pull mac header") which was dealing with a similar issue.
kernel BUG at include/linux/skbuff.h:2655 ! invalid opcode: 0000 [#1] SMP KASAN CPU: 0 PID: 1441 Comm: syz-executor199 Not tainted 6.1.24-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:__skb_pull include/linux/skbuff.h:2655 [inline] RIP: 0010:skb_mac_gso_segment+0x68f/0x6a0 net/core/gro.c:136 Code: fd 48 8b 5c 24 10 44 89 6b 70 48 c7 c7 c0 ae 0d 86 44 89 e6 e8 a1 91 d0 00 48 c7 c7 00 af 0d 86 48 89 de 31 d2 e8 d1 4a e9 ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 RSP: 0018:ffffc90001bd7520 EFLAGS: 00010286 RAX: ffffffff8469736a RBX: ffff88810f31dac0 RCX: ffff888115a18b00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90001bd75e8 R08: ffffffff84697183 R09: fffff5200037adf9 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000012 R13: 000000000000fee5 R14: 0000000000005865 R15: 000000000000fed7 FS: 000055555633f300(0000) GS:ffff8881f6a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 0000000116fea000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> [<ffffffff847018dd>] __skb_gso_segment+0x32d/0x4c0 net/core/dev.c:3419 [<ffffffff8470398a>] skb_gso_segment include/linux/netdevice.h:4819 [inline] [<ffffffff8470398a>] validate_xmit_skb+0x3aa/0xee0 net/core/dev.c:3725 [<ffffffff84707042>] __dev_queue_xmit+0x1332/0x3300 net/core/dev.c:4313 [<ffffffff851a9ec7>] dev_queue_xmit+0x17/0x20 include/linux/netdevice.h:3029 [<ffffffff851b4a82>] packet_snd net/packet/af_packet.c:3111 [inline] [<ffffffff851b4a82>] packet_sendmsg+0x49d2/0x6470 net/packet/af_packet.c:3142 [<ffffffff84669a12>] sock_sendmsg_nosec net/socket.c:716 [inline] [<ffffffff84669a12>] sock_sendmsg net/socket.c:736 [inline] [<ffffffff84669a12>] __sys_sendto+0x472/0x5f0 net/socket.c:2139 [<ffffffff84669c75>] __do_sys_sendto net/socket.c:2151 [inline] [<ffffffff84669c75>] __se_sys_sendto net/socket.c:2147 [inline] [<ffffffff84669c75>] __x64_sys_sendto+0xe5/0x100 net/socket.c:2147 [<ffffffff8551d40f>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8551d40f>] do_syscall_64+0x2f/0x50 arch/x86/entry/common.c:80 [<ffffffff85600087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
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 |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernelUpgrade kernel-tools-debuginfoUpgrade kernel-tools-develUpgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade python-perf-debuginfoUpgrade kernel-debuginfoUpgrade perfUpgrade perf-debuginfoUpgrade python-perfUpgrade kernel-develUpgrade kernel-livepatch-5.15.117-72.142Upgrade bpftoolUpgrade kernel-livepatch-5.10.184-174.730Upgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfo | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade python3-perfUpgrade kernel-headersUpgrade perfUpgrade perf-debuginfoUpgrade kernel-tools-develUpgrade kernel-toolsUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade python3-perf-debuginfoUpgrade kernel-libbpf-develUpgrade kernel-libbpfUpgrade bpftoolUpgrade kernel-tools-debuginfoUpgrade kernel-livepatch-6.1.34-56.100Upgrade kernel-debuginfoUpgrade kernel-libbpf-staticUpgrade kernel | Oct 16, 2025 | Sep 18, 2025 |
| Debian | — | Upgrade linux | Sep 22, 2025 | Sep 22, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade python3-perfUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernel | Feb 3, 2026 | Feb 2, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 18, 2025 |
| Ubuntu | — | Upgrade linux-intel-iot-realtimeUpgrade linux-oracle-5.4Upgrade linux-ibmUpgrade linux-raspiUpgrade linux-oracle-5.15Upgrade linux-ibm-5.15Upgrade linux-azure-5.15Upgrade linux-nvidiaUpgrade linux-oracleUpgrade linux-gcpUpgrade linux-aws-fipsUpgrade linux-azure-fipsUpgrade linux-lowlatencyUpgrade linux-nvidia-tegra-igxUpgrade linux-realtimeUpgrade linux-intel-iotgUpgrade linux-gkeUpgrade linux-riscv-5.15Upgrade linux-gcp-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-gkeopUpgrade linux-azureUpgrade linux-aws-5.4Upgrade linux-hwe-5.4Upgrade linux-gcp-5.4Upgrade linux-fipsUpgrade linux-kvmUpgrade linux-intel-iotg-5.15Upgrade linux-azure-5.4Upgrade linux-iotUpgrade linux-aws-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-hwe-5.15Upgrade linux-bluefieldUpgrade linuxUpgrade linux-awsUpgrade linux-nvidia-tegraUpgrade linux-raspi-5.4Upgrade linux-ibm-5.4Upgrade linux-gcp-fipsUpgrade linux-lowlatency-hwe-5.15 | Sep 26, 2025 | Sep 18, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Sep 18, 2025 |
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