{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-38351 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-38351 is a medium-severity denial of service vulnerability in Linux kernel, published on 19 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-38351 and fix it if it is affected.\n\nWhat it is: CVE-2025-38351 is a medium-severity denial of service vulnerability in Linux kernel, published on 19 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-38351 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-2025-38351/ (Markdown: https://insights.sbomify.com/CVE-2025-38351/index.md)","id":"CVE-2025-38351","markdown":"https://insights.sbomify.com/CVE-2025-38351/index.md","name":"CVE-2025-38351","record":{"aliases":["BELL-CVE-2025-38351","DEBIAN-CVE-2025-38351","GHSA-x77v-68j6-p42v","ROOT-OS-UBUNTU-2404-CVE-2025-38351","UBUNTU-CVE-2025-38351"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel KVM","requires_auth":"low_privilege","summary":"A malicious guest can trigger a kernel warning and potential denial of service by passing non-canonical addresses to Hyper-V TLB flush hypercalls on Intel systems.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86/hyper-v: Skip non-canonical addresses during PV TLB flush\n\nIn KVM guests with Hyper-V hypercalls enabled, the hypercalls\nHVCALL_FLUSH_VIRTUAL_ADDRESS_LIST and HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX\nallow a guest to request invalidation of portions of a virtual TLB.\nFor this, the hypercall parameter includes a list of GVAs that are supposed\nto be invalidated.\n\nHowever, when non-canonical GVAs are passed, there is currently no\nfiltering in place and they are eventually passed to checked invocations of\nINVVPID on Intel / INVLPGA on AMD.  While AMD's INVLPGA silently ignores\nnon-canonical addresses (effectively a no-op), Intel's INVVPID explicitly\nsignals VM-Fail and ultimately triggers the WARN_ONCE in invvpid_error():\n\n  invvpid failed: ext=0x0 vpid=1 gva=0xaaaaaaaaaaaaa000\n  WARNING: CPU: 6 PID: 326 at arch/x86/kvm/vmx/vmx.c:482\n  invvpid_error+0x91/0xa0 [kvm_intel]\n  Modules linked in: kvm_intel kvm 9pnet_virtio irqbypass fuse\n  CPU: 6 UID: 0 PID: 326 Comm: kvm-vm Not tainted 6.15.0 #14 PREEMPT(voluntary)\n  RIP: 0010:invvpid_error+0x91/0xa0 [kvm_intel]\n  Call Trace:\n    vmx_flush_tlb_gva+0x320/0x490 [kvm_intel]\n    kvm_hv_vcpu_flush_tlb+0x24f/0x4f0 [kvm]\n    kvm_arch_vcpu_ioctl_run+0x3013/0x5810 [kvm]\n\nHyper-V documents that invalid GVAs (those that are beyond a partition's\nGVA space) are to be ignored.  While not completely clear whether this\nruling also applies to non-canonical GVAs, it is likely fine to make that\nassumption, and manual testing on Azure confirms \"real\" Hyper-V interprets\nthe specification in the same way.\n\nSkip non-canonical GVAs when processing the list of address to avoid\ntripping the INVVPID failure.  Alternatively, KVM could filter out \"bad\"\nGVAs before inserting into the FIFO, but practically speaking the only\ndownside of pushing validation to the final processing is that doing so\nis suboptimal for the guest, and no well-behaved guest will request TLB\nflushes for non-canonical addresses.","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":"KVM: x86/hyper-v: Skip non-canonical addresses during PV TLB flush","id":"CVE-2025-38351","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2025"},"n_packages":0,"n_references":4,"next":{"headline":"Linux Kernel Time-of-Check Time-of-Use (TOCTOU) Race Condition","id":"CVE-2025-38352"},"packages":[],"prev":{"headline":"net/sched: Always pass notifications when child class becomes empty","id":"CVE-2025-38350"},"products":["Linux"],"published":"2025-07-19","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":"2026-05-11","vendors":["Linux"]},"summary":"A malicious guest can trigger a kernel warning and potential denial of service by passing non-canonical addresses to Hyper-V TLB flush hypercalls on Intel systems.","url":"https://insights.sbomify.com/CVE-2025-38351/"}