{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53359 exists.","fix":"Apply the vendor's patch.","what":"CVE-2026-53359 is a high-severity use after free vulnerability in Linux kernel, published on 4 Jul 2026. 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-2026-53359 and fix it if it is affected.\n\nWhat it is: CVE-2026-53359 is a high-severity use after free vulnerability in Linux kernel, published on 4 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53359 exists.\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-2026-53359/ (Markdown: https://insights.sbomify.com/CVE-2026-53359/index.md)","id":"CVE-2026-53359","markdown":"https://insights.sbomify.com/CVE-2026-53359/index.md","name":"CVE-2026-53359","record":{"aliases":["BELL-CVE-2026-53359","DEBIAN-CVE-2026-53359","GHSA-wpw8-53h7-xqcq","RHSA-2026:43847","RHSA-2026:44003","RHSA-2026:44004","ROOT-OS-DEBIAN-11-CVE-2026-53359","ROOT-OS-DEBIAN-12-CVE-2026-53359","ROOT-OS-UBUNTU-2204-CVE-2026-53359","ROOT-OS-UBUNTU-2404-CVE-2026-53359","SUSE-SU-2026:3376-1","UBUNTU-CVE-2026-53359"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel KVM","requires_auth":"low_privilege","summary":"A use-after-free in Linux KVM shadow paging allows local attackers to execute arbitrary code or escalate privileges via crafted memory slot operations.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Fix shadow paging use-after-free due to unexpected role\n\nCommit 0cb2af2ea66ad (\"KVM: x86: Fix shadow paging use-after-free due\nto unexpected GFN\") fixed a shadow paging mismatch between stored and\ncomputed GFNs; the bug could be triggered by changing a PDE mapping from\noutside the guest, and then deleting a memslot.  The rmap_remove()\ncall would miss entries created after the PDE change because the GFN\nof the leaf SPTE does not match the GFN of the struct kvm_mmu_page.\n\nA similar hole however remains if the modified PDE points to a non-leaf\npage.  In this case the gfn can be made to match, but the role does not\nmatch: the original large 2MB page creates a kvm_mmu_page with direct=1,\nwhile the new 4KB needs a kvm_mmu_page with direct=0.  However,\nkvm_mmu_get_child_sp() does not compare the role, and therefore reuses\nthe page.\n\nThe next step is installing a leaf (4KB) SPTE on the new path which\nrecords an rmap entry under the gfn resolved by the walk.  But when\nthat child is zapped its parent kvm_mmu_page has direct=1 and\nkvm_mmu_page_get_gfn() computes the gfn for the 4KB page as\nsp-\u003egfn + index instead of using sp-\u003eshadowed_translation[] (or sp-\u003egfns[]\nin older kernels).  It therefore fails to remove the recorded entry.\n\nWhen the memslot is dropped the shadow page is freed but the rmap\nentry survives, as in the scenario that was already fixed.  Code that\nlater walks that gfn (dirty logging, MMU notifier invalidation, and\nso on) dereferences an sptep that lies in the freed page, causing the\nuse-after-free.","ecosystems":["Red Hat:enterprise_linux:8::baseos","Red Hat:rhel_e4s:8.8::baseos","Red Hat:rhel_e4s:9.2::baseos","SUSE:Linux Enterprise Live Patching 12 SP5"],"exploits":{"exploitdb":0,"first_seen":"2026-07-07","github_poc":7,"max_poc_stars":6,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-07-07T09:52:44Z","kind":"github_poc","ref":"https://github.com/Aoripus-LTD/Januscape-Hotfix","stars":6,"title":"Complete fix collection for the CVE-2026-53359 guest-to-host escape vulnerability in the KVM/x86 shadow MMU. From zero-downtime livepatch to kernel upgrade — covers every operational scenario. / KVM/x86 shadow MMU 虚拟机逃逸漏洞（CVE-2026-53359）的完整修复方案集合。 从零停机热修复到内核升级，覆盖所有运维场景。"},{"date":"2026-07-07T07:18:55Z","kind":"github_poc","ref":"https://github.com/0xredash/CVE-2026-53359","stars":4,"title":"CVE-2026-53359"},{"date":"2026-07-07T21:21:13Z","kind":"github_poc","ref":"https://github.com/chuzhongyun/CVE-2026-53359-Kernel-Fix","stars":2,"title":"Linux 内核升级指南 - 修复 CVE-2026-53359"},{"date":"2026-07-09T18:21:47Z","kind":"github_poc","ref":"https://github.com/xj2268-TA/KVM-Januscape","stars":2,"title":"CVE-2026-53359漏洞补丁"},{"date":"2026-07-07T04:35:23Z","kind":"github_poc","ref":"https://github.com/HORKimhab/CVE-2026-53359","stars":0,"title":"CVE-2026-53359 - Draft"},{"date":"2026-07-08T08:45:06Z","kind":"github_poc","ref":"https://github.com/suominen/januscape","stars":0,"title":"Tracking Januscape (CVE-2026-53359), the KVM/x86 guest-to-host escape"},{"date":"2026-07-15T10:52:54Z","kind":"github_poc","ref":"https://github.com/ndouglas-cloudsmith/CVE-2026-53359","stars":0,"title":"A 16-year-old bug in the Linux kernel lets a rented VM break out and attack the host it runs on. Intel and AMD alike. Januscape is a use-after-free vulnerability in the KVM code that has been sitting there since 2010."}],"tier":"weaponised"},"has_fix":true,"headline":"KVM: x86: Fix shadow paging use-after-free due to unexpected role","id":"CVE-2026-53359","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2026"},"n_packages":46,"n_references":7,"next":{"headline":"KVM: SEV: Require in-GHCB scratch area if GHCB v2+ is in use","id":"CVE-2026-53360"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-7.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_109_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_109_1","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-7.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_109_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_109_1-debuginfo","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-7.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_109_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_109_1-debugsource","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-4.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_125_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_125_1","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-4.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_125_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_125_1-debuginfo","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-4.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_125_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_125_1-debugsource","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-14.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_53_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_53_1","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-14.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_53_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_53_1-debuginfo","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-14.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_53_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_53_1-debugsource","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-11.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_72_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_72_1","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-11.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_72_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_72_1-debuginfo","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-11.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_72_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_72_1-debugsource","source":"RHSA-2026:44004"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:1-9.el8_10"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-553_85_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-553_85_1","source":"RHSA-2026:44004"},{"ecosystem":"Red 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Hat:rhel_e4s:8.8::baseos","fixed":["0:1-10.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_107_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_107_1-debugsource","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-9.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_120_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_120_1","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-9.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_120_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_120_1-debuginfo","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-9.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_120_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_120_1-debugsource","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-7.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_130_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_130_1","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-7.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_130_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_130_1-debuginfo","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-7.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_130_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_130_1-debugsource","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-3.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_143_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_143_1","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-3.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_143_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_143_1-debuginfo","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-3.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_143_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_143_1-debugsource","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-14.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_97_1","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_97_1","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-14.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_97_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_97_1-debuginfo","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:8.8::baseos","fixed":["0:1-14.el8_8"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-4_18_0-477_97_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-4_18_0-477_97_1-debugsource","source":"RHSA-2026:43847"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["0:1-17.el9_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-284_117_1","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-284_117_1","source":"RHSA-2026:44003"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["0:1-17.el9_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-284_117_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-284_117_1-debuginfo","source":"RHSA-2026:44003"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["0:1-17.el9_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-284_117_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-284_117_1-debugsource","source":"RHSA-2026:44003"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["0:1-11.el9_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-284_134_1","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-284_134_1","source":"RHSA-2026:44003"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["0:1-11.el9_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-284_134_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-284_134_1-debuginfo","source":"RHSA-2026:44003"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["0:1-11.el9_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-284_134_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-284_134_1-debugsource","source":"RHSA-2026:44003"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["0:1-9.el9_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-284_148_1","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-284_148_1","source":"RHSA-2026:44003"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["0:1-9.el9_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-284_148_1-debuginfo","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-284_148_1-debuginfo","source":"RHSA-2026:44003"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["0:1-9.el9_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-284_148_1-debugsource","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-284_148_1-debugsource","source":"RHSA-2026:44003"},{"ecosystem":"Red Hat:rhel_e4s:9.2::baseos","fixed":["0:1-7.el9_2"],"introduced":["0"],"last_affected":[],"package":"kpatch-patch-5_14_0-284_158_1","purl":"pkg:rpm/redhat/kpatch-patch-5_14_0-284_158_1","source":"RHSA-2026:44003"}],"prev":{"headline":"Bluetooth: L2CAP: use chan timer to close channels in cleanup_listen()","id":"CVE-2026-53358"},"products":["Linux"],"published":"2026-07-04","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":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-03","vendors":["Linux"]},"summary":"A use-after-free in Linux KVM shadow paging allows local attackers to execute arbitrary code or escalate privileges via crafted memory slot operations.","url":"https://insights.sbomify.com/CVE-2026-53359/"}