{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2025-38455 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-38455 is a high-severity vulnerability in Debian Debian Linux, published on 25 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-2025-38455 and fix it if it is affected.\n\nWhat it is: CVE-2025-38455 is a high-severity vulnerability in Debian Debian Linux, published on 25 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-2025-38455 in the wild and no public exploit code.\n\nAffected product: Debian Debian 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-2025-38455/ (Markdown: https://insights.sbomify.com/CVE-2025-38455/index.md)","id":"CVE-2025-38455","markdown":"https://insights.sbomify.com/CVE-2025-38455/index.md","name":"CVE-2025-38455","record":{"aliases":["BELL-CVE-2025-38455","DEBIAN-CVE-2025-38455","GHSA-4j4q-hxqh-v4q9","ROOT-OS-DEBIAN-12-CVE-2025-38455","ROOT-OS-UBUNTU-2404-CVE-2025-38455","UBUNTU-CVE-2025-38455"],"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 race condition in KVM SEV-ES migration causes a null pointer dereference, leading to a kernel crash and denial of service.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SVM: Reject SEV{-ES} intra host migration if vCPU creation is in-flight\n\nReject migration of SEV{-ES} state if either the source or destination VM\nis actively creating a vCPU, i.e. if kvm_vm_ioctl_create_vcpu() is in the\nsection between incrementing created_vcpus and online_vcpus.  The bulk of\nvCPU creation runs _outside_ of kvm-\u003elock to allow creating multiple vCPUs\nin parallel, and so sev_info.es_active can get toggled from false=\u003etrue in\nthe destination VM after (or during) svm_vcpu_create(), resulting in an\nSEV{-ES} VM effectively having a non-SEV{-ES} vCPU.\n\nThe issue manifests most visibly as a crash when trying to free a vCPU's\nNULL VMSA page in an SEV-ES VM, but any number of things can go wrong.\n\n  BUG: unable to handle page fault for address: ffffebde00000000\n  #PF: supervisor read access in kernel mode\n  #PF: error_code(0x0000) - not-present page\n  PGD 0 P4D 0\n  Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n  CPU: 227 UID: 0 PID: 64063 Comm: syz.5.60023 Tainted: G     U     O        6.15.0-smp-DEV #2 NONE\n  Tainted: [U]=USER, [O]=OOT_MODULE\n  Hardware name: Google, Inc. Arcadia_IT_80/Arcadia_IT_80, BIOS 12.52.0-0 10/28/2024\n  RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:206 [inline]\n  RIP: 0010:arch_test_bit arch/x86/include/asm/bitops.h:238 [inline]\n  RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]\n  RIP: 0010:PageHead include/linux/page-flags.h:866 [inline]\n  RIP: 0010:___free_pages+0x3e/0x120 mm/page_alloc.c:5067\n  Code: \u003c49\u003e f7 06 40 00 00 00 75 05 45 31 ff eb 0c 66 90 4c 89 f0 4c 39 f0\n  RSP: 0018:ffff8984551978d0 EFLAGS: 00010246\n  RAX: 0000777f80000001 RBX: 0000000000000000 RCX: ffffffff918aeb98\n  RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffebde00000000\n  RBP: 0000000000000000 R08: ffffebde00000007 R09: 1ffffd7bc0000000\n  R10: dffffc0000000000 R11: fffff97bc0000001 R12: dffffc0000000000\n  R13: ffff8983e19751a8 R14: ffffebde00000000 R15: 1ffffd7bc0000000\n  FS:  0000000000000000(0000) GS:ffff89ee661d3000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: ffffebde00000000 CR3: 000000793ceaa000 CR4: 0000000000350ef0\n  DR0: 0000000000000000 DR1: 0000000000000b5f DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400\n  Call Trace:\n   \u003cTASK\u003e\n   sev_free_vcpu+0x413/0x630 arch/x86/kvm/svm/sev.c:3169\n   svm_vcpu_free+0x13a/0x2a0 arch/x86/kvm/svm/svm.c:1515\n   kvm_arch_vcpu_destroy+0x6a/0x1d0 arch/x86/kvm/x86.c:12396\n   kvm_vcpu_destroy virt/kvm/kvm_main.c:470 [inline]\n   kvm_destroy_vcpus+0xd1/0x300 virt/kvm/kvm_main.c:490\n   kvm_arch_destroy_vm+0x636/0x820 arch/x86/kvm/x86.c:12895\n   kvm_put_kvm+0xb8e/0xfb0 virt/kvm/kvm_main.c:1310\n   kvm_vm_release+0x48/0x60 virt/kvm/kvm_main.c:1369\n   __fput+0x3e4/0x9e0 fs/file_table.c:465\n   task_work_run+0x1a9/0x220 kernel/task_work.c:227\n   exit_task_work include/linux/task_work.h:40 [inline]\n   do_exit+0x7f0/0x25b0 kernel/exit.c:953\n   do_group_exit+0x203/0x2d0 kernel/exit.c:1102\n   get_signal+0x1357/0x1480 kernel/signal.c:3034\n   arch_do_signal_or_restart+0x40/0x690 arch/x86/kernel/signal.c:337\n   exit_to_user_mode_loop kernel/entry/common.c:111 [inline]\n   exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]\n   __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]\n   syscall_exit_to_user_mode+0x67/0xb0 kernel/entry/common.c:218\n   do_syscall_64+0x7c/0x150 arch/x86/entry/syscall_64.c:100\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n  RIP: 0033:0x7f87a898e969\n   \u003c/TASK\u003e\n  Modules linked in: gq(O)\n  gsmi: Log Shutdown Reason 0x03\n  CR2: ffffebde00000000\n  ---[ end trace 0000000000000000 ]---\n\nDeliberately don't check for a NULL VMSA when freeing the vCPU, as crashing\nthe host is likely desirable due to the VMSA being consumed by hardware.\nE.g. if KVM manages to allow VMRUN on the vCPU, hardware may read/write a\nbogus VMSA page.  Accessing P\n---truncated---","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: SVM: Reject SEV{-ES} intra host migration if vCPU creation is in-flight","id":"CVE-2025-38455","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel"],"type":"null_dereference","year":"2025"},"n_packages":0,"n_references":5,"next":{"headline":"ipmi:msghandler: Fix potential memory corruption in ipmi_create_user()","id":"CVE-2025-38456"},"packages":[],"prev":{"headline":"ALSA: ad1816a: Fix potential NULL pointer deref in snd_card_ad1816a_pnp()","id":"CVE-2025-38454"},"products":["Linux"],"published":"2025-07-25","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Linux"]},"summary":"A race condition in KVM SEV-ES migration causes a null pointer dereference, leading to a kernel crash and denial of service.","url":"https://insights.sbomify.com/CVE-2025-38455/"}