{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-80917 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-80917 is a vulnerability in Linux, published on 9 Sep 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-2026-80917 and fix it if it is affected.\n\nWhat it is: CVE-2026-80917 is a vulnerability in Linux, published on 9 Sep 2026. 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-2026-80917 in the wild and no public exploit code.\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-2026-80917/ (Markdown: https://insights.sbomify.com/CVE-2026-80917/index.md)","id":"CVE-2026-80917","markdown":"https://insights.sbomify.com/CVE-2026-80917/index.md","name":"CVE-2026-80917","record":{"aliases":["AZL-99957","BELL-CVE-2026-80917","DEBIAN-CVE-2026-80917","GHSA-9v6f-6hx3-8xxj","UBUNTU-CVE-2026-80917"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel","requires_auth":"none","summary":"A NULL pointer dereference in the Linux kernel PCI host-generic driver causes a system crash during boot on 32-bit CAM systems.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems\n\nOn 32-bit systems the config space is too large to ioremap in one go, so\npci_ecam_create() maps each bus segment separately and relies on the\n-\u003eadd_bus callback (pci_ecam_add_bus) to populate the per-bus mapping in\ncfg-\u003ewinp[]. pci_ecam_map_bus() then uses that mapping as the base for\nevery config access.\n\nThe generic ECAM ops (pci_generic_ecam_ops) already provide the -\u003eadd_bus\nand -\u003eremove_bus callbacks, but the CAM (legacy) ops in pci-host-generic.c\ndo not. As a result, on a 32-bit host using \"pci-host-cam-generic\" the\nper-bus mapping is never set up and the first config read dereferences a\nNULL base, crashing during bus enumeration:\n\n Unable to handle kernel NULL pointer dereference at virtual address 00000800\n Oops [#1]\n CPU: 0 PID: 1 Comm: swapper Not tainted 6.9.7+ #43\n Hardware name: Digilent Nexys-Video-A7 RV32 (DT)\n epc : pci_generic_config_read+0x40/0xb0\n  ra : pci_generic_config_read+0x2c/0xb0\n [\u003cc038db9c\u003e] pci_generic_config_read+0x40/0xb0\n [\u003cc038da04\u003e] pci_bus_read_config_dword+0x50/0xb0\n [\u003cc0391e94\u003e] pci_bus_generic_read_dev_vendor_id+0x3c/0x1ec\n [\u003cc039245c\u003e] pci_scan_single_device+0xa4/0x11c\n [\u003cc0392570\u003e] pci_scan_slot+0x9c/0x23c\n [\u003cc039388c\u003e] pci_scan_child_bus_extend+0x58/0x2f4\n [\u003cc0393db0\u003e] pci_scan_root_bus_bridge+0x64/0xe8\n [\u003cc0393e54\u003e] pci_host_probe+0x20/0xc8\n [\u003cc03bc6f4\u003e] pci_host_common_probe+0x144/0x1e4\n\nFix this by giving the CAM ops the same -\u003eadd_bus/-\u003eremove_bus callbacks.\nSince pci_ecam_add_bus() and pci_ecam_remove_bus() are static to ecam.c,\nmove the CAM ops definition there as pci_generic_cam_ops (mirroring\npci_generic_ecam_ops) and export it for pci-host-generic.c to reference.\n\n[mani: removed timestamp from log]","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":"PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems","id":"CVE-2026-80917","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"HID: core: fix number/pointer type confusion on long items","id":"CVE-2026-80918"},"packages":[],"prev":{"headline":"kcov: fix data corruption and race conditions on PREEMPT_RT","id":"CVE-2026-80916"},"products":["Linux"],"published":"2026-09-09","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A NULL pointer dereference in the Linux kernel PCI host-generic driver causes a system crash during boot on 32-bit CAM systems.","url":"https://insights.sbomify.com/CVE-2026-80917/"}