In the Linux kernel, the following vulnerability has been resolved:
skbuff: Account for tail adjustment during pull operations
Extending the tail can have some unexpected side effects if a program uses a helper like BPF_FUNC_skb_pull_data to read partial content beyond the head skb headlen when all the skbs in the gso frag_list are linear with no head_frag -
kernel BUG at net/core/skbuff.c:4219! pc : skb_segment+0xcf4/0xd2c lr : skb_segment+0x63c/0xd2c Call trace: skb_segment+0xcf4/0xd2c __udp_gso_segment+0xa4/0x544 udp4_ufo_fragment+0x184/0x1c0 inet_gso_segment+0x16c/0x3a4 skb_mac_gso_segment+0xd4/0x1b0 __skb_gso_segment+0xcc/0x12c udp_rcv_segment+0x54/0x16c udp_queue_rcv_skb+0x78/0x144 udp_unicast_rcv_skb+0x8c/0xa4 __udp4_lib_rcv+0x490/0x68c udp_rcv+0x20/0x30 ip_protocol_deliver_rcu+0x1b0/0x33c ip_local_deliver+0xd8/0x1f0 ip_rcv+0x98/0x1a4 deliver_ptype_list_skb+0x98/0x1ec __netif_receive_skb_core+0x978/0xc60
Fix this by marking these skbs as GSO_DODGY so segmentation can handle the tail updates accordingly.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/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-debuginfoUpgrade kernel-tools-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-4.14.304-226.531Upgrade perf-debuginfoUpgrade bpftoolUpgrade kernel-toolsUpgrade python-perfUpgrade kernel-livepatch-5.15.86-53.137Upgrade kernel-tools-develUpgrade kernel-develUpgrade kernel-livepatch-5.10.165-143.735Upgrade bpftool-debuginfoUpgrade perfUpgrade kernel-debuginfo-common-aarch64 | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Sep 19, 2025 | Sep 19, 2025 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernelUpgrade python3-perf | Jan 15, 2026 | Jan 13, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade python3-perfUpgrade kernel-tools-libsUpgrade kernelUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernel-tools | Feb 3, 2026 | Jan 30, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Sep 17, 2025 |
| Ubuntu | — | Upgrade linux-xilinx-zynqmpUpgrade linux-hweUpgrade linux-azure-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-kvmUpgrade linux-gkeopUpgrade linux-gcpUpgrade linux-gcp-4.15Upgrade linux-raspiUpgrade linux-fipsUpgrade linux-realtimeUpgrade linux-gcp-fipsUpgrade linux-riscv-5.15Upgrade linux-bluefieldUpgrade linux-lowlatencyUpgrade linux-intel-iotgUpgrade linux-oracle-5.15Upgrade linux-hwe-5.15Upgrade linux-aws-fipsUpgrade linux-azureUpgrade linux-nvidiaUpgrade linux-hwe-5.4Upgrade linux-azure-5.4Upgrade linux-aws-hweUpgrade linux-ibmUpgrade linux-oracleUpgrade linux-intel-iotg-5.15Upgrade linux-gcp-5.15Upgrade linuxUpgrade linux-intel-iot-realtimeUpgrade linux-oracle-5.4Upgrade linux-aws-5.4Upgrade linux-azure-4.15Upgrade linux-ibm-5.4Upgrade linux-gkeUpgrade linux-awsUpgrade linux-nvidia-tegra-5.15Upgrade linux-iotUpgrade linux-azure-fipsUpgrade linux-aws-5.15Upgrade linux-raspi-5.4Upgrade linux-gcp-5.4 | Sep 26, 2025 | Sep 17, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Sep 17, 2025 |
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