CVE-2026-98020

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98020", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:19:56.069Z", "datePublished": "2026-09-25T10:23:40.900Z", "dateUpdated": "2026-10-19T09:12:25.476Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:12:25.476Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/amd/pds_core/fw.c", "drivers/net/ethernet/amd/pds_core/main.c"], "versions": [{"version": "f6ec6ac9432941ec85a2221c91b1ecfc85680d89", "lessThan": "0bf9f3bae3c4b1eadb7a2bf63350333db7dac0d9", "status": "affected", "versionType": "git"}, {"version": "e96094c1d11cce4deb5da3c0500d49041ab845b8", "lessThan": "2cc697565fd19b5ba2d100cdd4a20dd6d263abc2", "status": "affected", "versionType": "git"}, {"version": "e96094c1d11cce4deb5da3c0500d49041ab845b8", "lessThan": "fa31bd14c5042c6315bb2182c963f03ca6e79ca4", "status": "affected", "versionType": "git"}, {"version": "e96094c1d11cce4deb5da3c0500d49041ab845b8", "lessThan": "09f831bfe39de5b8026fefb3d106b5cc93272170", "status": "affected", "versionType": "git"}, {"version": "e96094c1d11cce4deb5da3c0500d49041ab845b8", "lessThan": "7980325b2f71e3f65c1323c39792e2455da6fab6", "status": "affected", "versionType": "git"}, {"version": "692488941283d72362274620b9abd28109fc459f", "status": "affected", "versionType": "git"}, {"version": "6.6.16", "lessThan": "6.6.158", "status": "affected", "versionType": "semver"}, {"version": "6.7.4", "lessThan": "6.8", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/amd/pds_core/fw.c", "drivers/net/ethernet/amd/pds_core/main.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.16", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0bf9f3bae3c4b1eadb7a2bf63350333db7dac0d9"}, {"url": "https://git.kernel.org/stable/c/2cc697565fd19b5ba2d100cdd4a20dd6d263abc2"}, {"url": "https://git.kernel.org/stable/c/fa31bd14c5042c6315bb2182c963f03ca6e79ca4"}, {"url": "https://git.kernel.org/stable/c/09f831bfe39de5b8026fefb3d106b5cc93272170"}, {"url": "https://git.kernel.org/stable/c/7980325b2f71e3f65c1323c39792e2455da6fab6"}], "title": "pds_core: fix cmd_regs access racing BAR unmap on reset", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/amd/pds_core/fw.c", "drivers/net/ethernet/amd/pds_core/main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "0bf9f3bae3c4b1eadb7a2bf63350333db7dac0d9", "status": "affected", "version": "f6ec6ac9432941ec85a2221c91b1ecfc85680d89", "versionType": "git"}, {"lessThan": "2cc697565fd19b5ba2d100cdd4a20dd6d263abc2", "status": "affected", "version": "e96094c1d11cce4deb5da3c0500d49041ab845b8", "versionType": "git"}, {"lessThan": "fa31bd14c5042c6315bb2182c963f03ca6e79ca4", "status": "affected", "version": "e96094c1d11cce4deb5da3c0500d49041ab845b8", "versionType": "git"}, {"lessThan": "09f831bfe39de5b8026fefb3d106b5cc93272170", "status": "affected", "version": "e96094c1d11cce4deb5da3c0500d49041ab845b8", "versionType": "git"}, {"lessThan": "7980325b2f71e3f65c1323c39792e2455da6fab6", "status": "affected", "version": "e96094c1d11cce4deb5da3c0500d49041ab845b8", "versionType": "git"}, {"status": "affected", "version": "692488941283d72362274620b9abd28109fc459f", "versionType": "git"}, {"lessThan": "6.6.158", "status": "affected", "version": "6.6.16", "versionType": "semver"}, {"lessThan": "6.8", "status": "affected", "version": "6.7.4", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/amd/pds_core/fw.c", "drivers/net/ethernet/amd/pds_core/main.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.8"}, {"lessThan": "6.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-98020", "lastModified": "2026-10-19T10:17:55.857", "metrics": {}, "published": "2026-09-25T11:17:30.480", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/09f831bfe39de5b8026fefb3d106b5cc93272170"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0bf9f3bae3c4b1eadb7a2bf63350333db7dac0d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2cc697565fd19b5ba2d100cdd4a20dd6d263abc2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7980325b2f71e3f65c1323c39792e2455da6fab6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fa31bd14c5042c6315bb2182c963f03ca6e79ca4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: pds_core: fix cmd_regs access racing BAR unmap on reset", "id": "2541059", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541059"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\npds_core: fix cmd_regs access racing BAR unmap on reset\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.\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.\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.\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.", "A flaw was found in the Linux kernel's pds_core driver. This vulnerability can lead to a denial of service (DoS) through a system crash. A local user with administrative privileges could trigger this issue by initiating a device reset while a firmware flash update is in progress, causing the driver to access unmapped device memory."], "name": "CVE-2026-98020", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98020\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98020\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98020.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e96094c1d11cce4deb5da3c0500d49041ab845b8,2cc697565fd19b5ba2d100cdd4a20dd6d263abc2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e96094c1d11cce4deb5da3c0500d49041ab845b8,fa31bd14c5042c6315bb2182c963f03ca6e79ca4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e96094c1d11cce4deb5da3c0500d49041ab845b8,09f831bfe39de5b8026fefb3d106b5cc93272170)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e96094c1d11cce4deb5da3c0500d49041ab845b8,7980325b2f71e3f65c1323c39792e2455da6fab6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "f6ec6ac9432941ec85a2221c91b1ecfc85680d89"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "692488941283d72362274620b9abd28109fc459f"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[6.6.16,6.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[6.7.4,6.8)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.111,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.53,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.7,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc3,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-25T15:15:14.511883+00:00", "updated": "2026-09-30T14:15:16.124892+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}