{"id":"CVE-2026-98020","revision":"6d699f5b0d1947529d8eceab867e1f93","records":[{"revision":"6d699f5b0d1947529d8eceab867e1f93","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98020","aliases":[],"title":"pds_core: fix cmd_regs access racing BAR unmap on reset","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npds_core: fix cmd_regs access racing BAR unmap on reset\n\npdsc_reset_prepare() and pdsc_reset_done()'s pdsc_map_bars() error path\nclear/iounmap cmd_regs without devcmd_lock, and\npdsc_legacy_firmware_update()'s download loop derefs cmd_regs after\ndropping and retaking the lock without re-checking. An FLR concurrent\nwith a devlink flash can unmap cmd_regs under an in-flight devcmd,\ncausing a NULL deref or a write to unmapped MMIO.\n\nTake devcmd_lock across the BAR unmap/remap, and re-check cmd_regs in\nthe download loop. Only the PF maps cmd_regs and runs devcmd, so skip\nthe unmap on a VF, as pdsc_remove() and pdsc_reset_done() already do.\n\nA reset that completes entirely within the unlocked window is not a\ncorrectness problem for the image: the device clears its update session,\nso a resumed download is rejected, and it verifies the staged image\nbefore writing a flash slot, reporting PDS_RC_BAD_FW rather than\nactivating it.\n\npdsc_unmap_bars() also clears info_regs, intr_status and intr_ctrl. The\ninterrupt and start/stop readers of those are quiesced before the unmap\nby pdsc_fw_down(), which frees the interrupts and tears down the queues.\nThe debugfs readers are not, since those files outlive a reset; that is\npre-existing and out of scope here.","state":0,"publishedAt":"2026-09-25T10:23:40.9+00:00","modifiedAt":"2026-10-19T09:12:25.476+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/ethernet/amd/pds_core/fw.c\",\n                        \"drivers/net/ethernet/amd/pds_core/main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f6ec6ac9432941ec85a2221c91b1ecfc85680d89\",\n                            \"lessThan\": \"0bf9f3bae3c4b1eadb7a2bf63350333db7dac0d9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e96094c1d11cce4deb5da3c0500d49041ab845b8\",\n                            \"lessThan\": \"2cc697565fd19b5ba2d100cdd4a20dd6d263abc2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e96094c1d11cce4deb5da3c0500d49041ab845b8\",\n                            \"lessThan\": \"fa31bd14c5042c6315bb2182c963f03ca6e79ca4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e96094c1d11cce4deb5da3c0500d49041ab845b8\",\n                            \"lessThan\": \"09f831bfe39de5b8026fefb3d106b5cc93272170\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e96094c1d11cce4deb5da3c0500d49041ab845b8\",\n                            \"lessThan\": \"7980325b2f71e3f65c1323c39792e2455da6fab6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"692488941283d72362274620b9abd28109fc459f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"6.6.16\",\n                            \"lessThan\": \"6.6.158\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.7.4\",\n                            \"lessThan\": \"6.8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/net/ethernet/amd/pds_core/fw.c\",\n                        \"drivers/net/ethernet/amd/pds_core/main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.111\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/0bf9f3bae3c4b1eadb7a2bf63350333db7dac0d9","https://git.kernel.org/stable/c/2cc697565fd19b5ba2d100cdd4a20dd6d263abc2","https://git.kernel.org/stable/c/fa31bd14c5042c6315bb2182c963f03ca6e79ca4","https://git.kernel.org/stable/c/09f831bfe39de5b8026fefb3d106b5cc93272170","https://git.kernel.org/stable/c/7980325b2f71e3f65c1323c39792e2455da6fab6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98020","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98020","identifiers":["CVE-2026-98020"]},"retained":false,"historicalAffected":[]}],"coverage":[]}