{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-80917", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80917", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-09T16:13:15.202Z", "updatedAt": "2026-10-19T08:45:01.637Z", "importedAt": "2026-10-24T01:58:30.346Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems", "summary": "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->add_bus callback (pci_ecam_add_bus) to populate the per-bus mapping in\ncfg->winp[]. 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 ->add_bus\nand ->remove_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 [] pci_generic_config_read+0x40/0xb0\n [] pci_bus_read_config_dword+0x50/0xb0\n [] pci_bus_generic_read_dev_vendor_id+0x3c/0x1ec\n [] pci_scan_single_device+0xa4/0x11c\n [] pci_scan_slot+0x9c/0x23c\n [] pci_scan_child_bus_extend+0x58/0x2f4\n [] pci_scan_root_bus_bridge+0x64/0xe8\n [] pci_host_probe+0x20/0xc8\n [] pci_host_common_probe+0x144/0x1e4\n\nFix this by giving the CAM ops the same ->add_bus/->remove_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]", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb", "status": "affected", "versionType": "git", "lessThan": "5e52eb0290f66ba0732956dcb1e365b5ca3c5108" }, { "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb", "status": "affected", "versionType": "git", "lessThan": "baf9b0383ff770fdff123d3a832f3a99641d96dd" }, { "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb", "status": "affected", "versionType": "git", "lessThan": "8d08713ec83a18526d1ed1fd5f0d2b901d103a10" }, { "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb", "status": "affected", "versionType": "git", "lessThan": "74456843f18ba7f3045974d7e8b88ab993152b8c" }, { "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb", "status": "affected", "versionType": "git", "lessThan": "0c55707bd5d0d7670704cfd0dda933809b052f67" }, { "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb", "status": "affected", "versionType": "git", "lessThan": "a199293f3038db8d31d47aa60f1e18272cd82354" }, { "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb", "status": "affected", "versionType": "git", "lessThan": "0916948026f623844acd08888f7cbedbf1c48d6b" }, { "version": "8fe55ef23387ce3c7488375b1fd539420d7654bb", "status": "affected", "versionType": "git", "lessThan": "008cb88edb41f3c7c8e0ed763ff9f26719830984" }, { "version": "0b5877a1aeacdbf32b3bea91326592004ec7806f", "status": "affected", "versionType": "git" }, { "version": "a037ebbe72a4f98495b193112e2b2000e5e09eb5", "status": "affected", "versionType": "git" }, { "version": "5.12.19", "status": "affected", "versionType": "semver", "lessThan": "5.13" }, { "version": "5.13.4", "status": "affected", "versionType": "semver", "lessThan": "5.14" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.14", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.14" }, { "version": "5.15.218", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.185", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.154", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.106", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.47", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2.1", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }