{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-43039 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-43039 is a critical vulnerability in Linux kernel, published on 1 May 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-2026-43039 and fix it if it is affected.\n\nWhat it is: CVE-2026-43039 is a critical vulnerability in Linux kernel, published on 1 May 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-2026-43039 in the wild and no public exploit code.\n\nAffected product: Linux kernel. 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-2026-43039/ (Markdown: https://insights.sbomify.com/CVE-2026-43039/index.md)","id":"CVE-2026-43039","markdown":"https://insights.sbomify.com/CVE-2026-43039/index.md","name":"CVE-2026-43039","record":{"aliases":["DEBIAN-CVE-2026-43039","GHSA-958g-8q2h-mvmg","UBUNTU-CVE-2026-43039"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel driver","requires_auth":"none","summary":"A missing data copy in the TI ICSSG PRUETH driver leaks uninitialized kernel heap memory to userspace, allowing attackers to read sensitive kernel data.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ti: icssg-prueth: fix missing data copy and wrong recycle in ZC RX dispatch\n\nemac_dispatch_skb_zc() allocates a new skb via napi_alloc_skb() but\nnever copies the packet data from the XDP buffer into it. The skb is\npassed up the stack containing uninitialized heap memory instead of\nthe actual received packet, leaking kernel heap contents to userspace.\n\nCopy the received packet data from the XDP buffer into the skb using\nskb_copy_to_linear_data().\n\nAdditionally, remove the skb_mark_for_recycle() call since the skb is\nbacked by the NAPI page frag allocator, not page_pool. Marking a\nnon-page_pool skb for recycle causes the free path to return pages to\na page_pool that does not own them, corrupting page_pool state.\n\nThe non-ZC path (emac_rx_packet) does not have these issues because it\nuses napi_build_skb() to wrap the existing page_pool page directly,\nrequiring no copy, and correctly marks for recycle since the page comes\nfrom page_pool_dev_alloc_pages().","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":"net: ti: icssg-prueth: fix missing data copy and wrong recycle in ZC RX dispatch","id":"CVE-2026-43039","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"net: ipv6: ndisc: fix ndisc_ra_useropt to initialize nduseropt_padX fields to zero to prevent an info-leak","id":"CVE-2026-43040"},"packages":[],"prev":{"headline":"ipv6: icmp: clear skb2-\u003ecb[] in ip6_err_gen_icmpv6_unreach()","id":"CVE-2026-43038"},"products":["Linux"],"published":"2026-05-01","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A missing data copy in the TI ICSSG PRUETH driver leaks uninitialized kernel heap memory to userspace, allowing attackers to read sensitive kernel data.","url":"https://insights.sbomify.com/CVE-2026-43039/"}