{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-98557 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-98557 is a denial of service vulnerability in Linux, published on 18 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-98557 and fix it if it is affected.\n\nWhat it is: CVE-2026-98557 is a denial of service vulnerability in Linux, published on 18 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-98557 in the wild and no public exploit code.\n\nAffected product: Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-98557/ (Markdown: https://insights.sbomify.com/CVE-2026-98557/index.md)","id":"CVE-2026-98557","markdown":"https://insights.sbomify.com/CVE-2026-98557/index.md","name":"CVE-2026-98557","record":{"aliases":["DEBIAN-CVE-2026-98557","GHSA-jvwf-rjpr-3g5x","UBUNTU-CVE-2026-98557"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel driver","requires_auth":"none","summary":"A flaw in the Linux kernel gve driver causes incorrect buffer calculations for UDP GSO packets, potentially leading to denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngve: DQO: fix header length used by gve_can_send_tso() for UDP GSO\n\ngve_can_send_tso() computes how many buffers each segment of a GSO\npacket would span, and for this it needs the length of the headers\nthat the device replicates in front of every segment.\n\nIt unconditionally uses skb_tcp_all_headers(), which reads the doff\nfield of the TCP header. SKB_GSO_UDP_L4 packets have no TCP header:\ntcp_hdrlen() then reads one byte of the UDP payload, and header_len\ncan be anything in [0, 60] instead of the transport offset plus the\neight bytes of the UDP header that gve_prep_tso() programs into the\nTSO context descriptor.\n\nA wrong header length shifts all the segment boundaries computed in\nthe loop, so the number of buffers per segment can be over or under\nestimated. In the first case, GSO is needlessly disabled for this\npacket by gve_features_check_dqo() and the stack has to segment it.\nIn the second case, the driver hands the device a packet whose\nsegments span more than GVE_TX_MAX_DATA_DESCS buffers.\n\nUse the UDP header length for SKB_GSO_UDP_L4 packets, matching what\ngve_prep_tso() does.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"gve: DQO: fix header length used by gve_can_send_tso() for UDP GSO","id":"CVE-2026-98557","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"net: flush skb_defer_nodes in dev_cpu_dead()","id":"CVE-2026-98558"},"packages":[],"prev":{"headline":"gve: DQO: reject TSO packets with an out of range MSS","id":"CVE-2026-98556"},"products":["Linux"],"published":"2026-10-18","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A flaw in the Linux kernel gve driver causes incorrect buffer calculations for UDP GSO packets, potentially leading to denial of service.","url":"https://insights.sbomify.com/CVE-2026-98557/"}