{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-74580 exists.","fix":"Apply the vendor's patch.","what":"CVE-2026-74580 is a high-severity memory corruption vulnerability in Linux, published on 21 Aug 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-2026-74580 and fix it if it is affected.\n\nWhat it is: CVE-2026-74580 is a high-severity memory corruption vulnerability in Linux, published on 21 Aug 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-2026-74580 exists.\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-2026-74580/ (Markdown: https://insights.sbomify.com/CVE-2026-74580/index.md)","id":"CVE-2026-74580","markdown":"https://insights.sbomify.com/CVE-2026-74580/index.md","name":"CVE-2026-74580","record":{"aliases":["AZL-96992","BELL-CVE-2026-74580","DEBIAN-CVE-2026-74580","GHSA-mr6w-hqp3-cg59","UBUNTU-CVE-2026-74580"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel vhost","requires_auth":"low_privilege","summary":"A stale cache in the Linux kernel vhost driver allows out-of-bounds memory access, potentially enabling code execution or privilege escalation.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"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":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvhost: reset the vring metadata cache on vring reconfiguration\n\nvq-\u003emeta_iotlb[] caches the vhost_iotlb_map that backs each vring\nmetadata region, and iotlb_access_ok() returns early on a cache hit,\ntaking the hit as proof that the region has already been validated:\n\n\tif (vhost_vq_meta_fetch(vq, addr, len, type))\n\t\treturn true;\n\nThe cache is reset on VHOST_IOTLB_UPDATE and VHOST_IOTLB_INVALIDATE, on\ndevice IOTLB (re)initialisation and on vq reset, but not when\nVHOST_SET_VRING_ADDR replaces vq-\u003edesc, vq-\u003eavail and vq-\u003eused, nor when\nVHOST_SET_VRING_NUM changes the region sizes.\n\nWith a device IOTLB attached both ioctls are accepted while the vq is\nlive, and neither validates the addresses at ioctl time: vq_access_ok()\nand vq_log_used_access_ok() return true early because the addresses are\nGIOVAs, deferring validation to prefetch time.  Once the cache has been\npopulated that deferred validation no longer runs -- vq_meta_prefetch()\nhits the stale entry and returns true -- and vhost_vq_meta_fetch() keeps\ntranslating through the old mapping as\n\n\tmap-\u003eaddr + addr - map-\u003estart\n\nfor an address the mapping no longer covers.  vhost_copy_to_user() and\nvhost_copy_from_user() consume the result with __copy_to_user() and\n__copy_from_user(), which do not check it either, so a subsequent used\nring update or descriptor fetch accesses memory outside the region the\nIOTLB actually maps.\n\nReset the metadata cache whenever the vring is reconfigured, so the new\naddresses are pushed back through iotlb_access_ok()'s slow path.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-10-14","github_poc":4,"max_poc_stars":2,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-10-14T14:26:39Z","kind":"github_poc","ref":"https://github.com/ABC00012345/CVE-2026-74580","stars":2,"title":null},{"date":"2026-10-17T22:33:10Z","kind":"github_poc","ref":"https://github.com/V01DL1NG/vghost-watch","stars":1,"title":"Passive internet-wide discovery + responsible-disclosure helper for CVE-2026-74580 (Linux vhost metadata-cache bug) — queries existing scan data (Sonar/Shodan/Censys), triages exposure, and drafts (never auto-sends) notices to owners."},{"date":"2026-10-25T12:05:40Z","kind":"github_poc","ref":"https://github.com/YounesHfa/CVE-2026-74580","stars":1,"title":"CVE-2026-74580 vhost: reset the vring metadata cache on vring reconfiguration - Exploit"},{"date":"2026-10-14T13:27:43Z","kind":"github_poc","ref":"https://github.com/techupdate24/linux-kernel-cve-2026-74580-vghost","stars":0,"title":"A complete guide and workflow for integrating Agile sprints with DevOps CI/CD pipelines."}],"tier":"weaponised"},"has_fix":true,"headline":"vhost: reset the vring metadata cache on vring reconfiguration","id":"CVE-2026-74580","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"net: ipv6: clear suppressed fib6 rule result","id":"CVE-2026-74581"},"packages":[],"prev":{"headline":"netfilter: nft_payload: fix mask build for partial field offload","id":"CVE-2026-74579"},"products":["Linux"],"published":"2026-08-21","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-10-29","vendors":["Linux"]},"summary":"A stale cache in the Linux kernel vhost driver allows out-of-bounds memory access, potentially enabling code execution or privilege escalation.","url":"https://insights.sbomify.com/CVE-2026-74580/"}