In the Linux kernel, the following vulnerability has been resolved:
net: add pskb_may_pull() to skb_gro_receive_list()
skb_gro_receive_list() calls skb_pull(skb, skb_gro_offset(skb)) without first ensuring the data is in the linear area via pskb_may_pull(). When the skb arrives via napi_gro_frags(), skb_headlen can be 0 (all data in page fragments) while skb_gro_offset is non-zero (after IP+TCP header parsing). The skb_pull() then decrements skb->len by skb_gro_offset but skb->data_len stays unchanged, hitting BUG_ON(skb->len < skb->data_len) in __skb_pull().
The UDP fraglist GRO path already contains this guard at udp_offload.c:749. Adding it to skb_gro_receive_list() itself provides centralized protection for all callers (TCP, UDP, and any future protocols), and ensures the precondition of skb_pull() is satisfied before it is called.
On pskb_may_pull() failure, set NAPI_GRO_CB(skb)->flush = 1 so the skb is not held as a new GRO head and is instead delivered through the normal receive path, matching the UDP handling.
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_2023 | — | Upgrade kernel6.12-toolsUpgrade kernel6.12-develUpgrade kernel6.18Upgrade kernel6.18-headersUpgrade bpftool6.12-debuginfoUpgrade kernel6.18-toolsUpgrade python3-perf6.12-debuginfoUpgrade python3-perf6.12Upgrade kernel6.18-modules-extra-commonUpgrade perf6.12-debuginfoUpgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.18-modules-extraUpgrade kernel6.18-develUpgrade kernel6.12-tools-develUpgrade kernel6.12Upgrade python3-perf6.18Upgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-modules-extraUpgrade python3-perf6.18-debuginfoUpgrade kernel-livepatch-6.18.36-69.134Upgrade perf6.18Upgrade microvm-kernel6.18Upgrade kernel6.18-debuginfoUpgrade kernel-livepatch-6.12.94-123.174Upgrade bpftool6.18Upgrade kernel6.12-debuginfoUpgrade kernel6.18-tools-debuginfoUpgrade kernel6.12-headersUpgrade kernel6.18-tools-develUpgrade bpftool6.18-debuginfoUpgrade perf6.12Upgrade kernel6.12-debuginfo-common-aarch64Upgrade bpftool6.12Upgrade perf6.18-debuginfoUpgrade kernel6.12-modules-extra-common | Jul 21, 2026 | Jun 25, 2026 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | Upgrade kernelUpgrade kernel-rt | Sep 10, 2026 | Jun 25, 2026 |
| Rocky_linux | — | Upgrade kernel-debuginfo-common-s390xUpgrade kernel-modules-extra-matchedUpgrade kernel-rt-develUpgrade libperf-debuginfoUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-develUpgrade python3-perfUpgrade kernel-debug-modules-coreUpgrade kernel-tools-libs-develUpgrade kernel-uki-virt-addonsUpgrade kernel-rt-debug-coreUpgrade kernel-zfcpdump-debuginfoUpgrade kernel-toolsUpgrade rvUpgrade kernel-rt-modules-extraUpgrade kernelUpgrade kernel-tools-libsUpgrade kernel-debug-modulesUpgrade kernel-rt-debugUpgrade kernel-rt-debug-debuginfoUpgrade python3-perf-debuginfoUpgrade kernel-rtUpgrade kernel-zfcpdump-coreUpgrade kernel-debuginfo-common-x86_64Upgrade perfUpgrade kernel-debug-modules-extraUpgrade kernel-debug-devel-matchedUpgrade perf-debuginfoUpgrade kernel-rt-modulesUpgrade kernel-zfcpdump-develUpgrade kernel-modules-extraUpgrade kernel-rt-debug-develUpgrade libperfUpgrade kernel-zfcpdump-modulesUpgrade kernel-tools-debuginfoUpgrade kernel-rt-debug-modules-extraUpgrade kernel-modules-coreUpgrade kernel-debug-uki-virtUpgrade kernel-debug-coreUpgrade kernel-debugUpgrade kernel-debug-develUpgrade kernel-modulesUpgrade kernel-rt-coreUpgrade kernel-rt-debug-modules-coreUpgrade kernel-rt-modules-coreUpgrade kernel-rt-debuginfoUpgrade rtlaUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-zfcpdumpUpgrade kernel-uki-virtUpgrade kernel-debuginfoUpgrade kernel-coreUpgrade kernel-rt-debug-modulesUpgrade kernel-devel-matchedUpgrade kernel-debug-debuginfo | Sep 15, 2026 | Sep 9, 2026 |
| Ubuntu | — | Upgrade linux-image-gke-hwe-26.04Upgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-genericUpgrade linux-image-nvidia-64kUpgrade linux-image-azure-7.0Upgrade linux-image-gkeUpgrade linux-image-7.0.0-31-genericUpgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-oracle-64kUpgrade linux-image-7.0.0-1019-raspi-realtimeUpgrade linux-image-generic-64k-7.0Upgrade linux-image-7.0.0-1013-oemUpgrade linux-image-nvidia-bos-7.0Upgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-raspi-7.0Upgrade linux-image-virtual-7.0Upgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-realtime-hwe-26.04Upgrade linux-image-7.0.0-1014-azureUpgrade linux-image-aws-64kUpgrade linux-image-realtimeUpgrade linux-image-realtime-64k-7.0Upgrade linux-image-virtualUpgrade linux-image-7.0.0-31-generic-64kUpgrade linux-image-generic-64kUpgrade linux-image-7.0.0-1006-gkeUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oracleUpgrade linux-image-realtime-64kUpgrade linux-image-7.0.0-2018-nvidia-bosUpgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-7.0.0-1006-gke-64kUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-nvidiaUpgrade linux-image-gcpUpgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-generic-7.0Upgrade linux-image-generic-hwe-26.04Upgrade linux-image-raspi-realtimeUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-gcp-7.0Upgrade linux-image-oem-26.04bUpgrade linux-image-7.0.0-1019-raspiUpgrade linux-image-oem-7.0Upgrade linux-image-7.0.0-1013-ibmUpgrade linux-image-oem-26.04aUpgrade linux-image-aws-64k-7.0Upgrade linux-image-awsUpgrade linux-image-azure-lts-26.04Upgrade linux-image-7.0.0-31-realtimeUpgrade linux-image-7.0.0-1018-nvidia-64kUpgrade linux-image-realtime-7.0Upgrade linux-image-raspiUpgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-nvidia-bosUpgrade linux-image-nvidia-64k-7.0Upgrade linux-image-gke-64k-7.0Upgrade linux-image-aws-7.0Upgrade linux-image-nvidia-7.0Upgrade linux-image-ibm-7.0Upgrade linux-image-oem-26.04Upgrade linux-image-nvidia-bos-64kUpgrade linux-image-gke-7.0Upgrade linux-image-gcp-64k-7.0Upgrade linux-image-azureUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-7.0.0-1012-aws-64kUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-ibmUpgrade linux-image-7.0.0-2018-nvidia-bos-64kUpgrade linux-image-7.0.0-1018-nvidiaUpgrade linux-image-raspi-realtime-7.0Upgrade linux-image-oracle-7.0Upgrade linux-image-7.0.0-1012-awsUpgrade linux-image-gcp-64kUpgrade linux-image-7.0.0-31-realtime-64kUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-gke-64k | Sep 14, 2026 | Sep 7, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 13, 2026 | Jun 25, 2026 |
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