{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80998", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.812Z", "datePublished": "2026-09-11T19:42:52.861Z", "dateUpdated": "2026-09-11T19:42:52.861Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:42:52.861Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bnxt: ring the doorbell when SW USO exits early\n\nWhen a burst of packets is handed down to the driver, the driver defers\nthe doorbell to the end by setting txr->kick_pending = 1. The normal TX\npath handles this, but the SW USO path can miss it if it returns\nearly.\n\nIf bnxt_sw_udp_gso_xmit runs but returns early with NETDEV_TX_BUSY and\ntxr->kick_pending was previously set to 1, then the TX queue can\nstall because the driver wrote some BDs but never wrote the doorbell.\nThe device won't know to do the TX which would generate the completion\nthat would wake the queue back up.\n\nSimplify bnxt_sw_udp_gso_xmit to set txr->kick_pending in its success\ncase and check the flag on return. The added check after\nbnxt_sw_udp_gso_xmit returns ensures that any pending doorbells are\nwritten handling both successful USO and any early returns, which\nprevents the TX queue stall mentioned above.\n\nThis TX queue stall was observed on a production system with a netdev TX\nwatchdog informing about the queue stall."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_gso.c"], "versions": [{"version": "cc5d90667db81474ed7a92a1b2fa3daec5559307", "lessThan": "48d1c9665db6e3d4aeca62eb669377162ebc6fdf", "status": "affected", "versionType": "git"}, {"version": "cc5d90667db81474ed7a92a1b2fa3daec5559307", "lessThan": "4e15e89faac9f308baeb01f46c13a051814d2449", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_gso.c"], "versions": [{"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "7.1", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/48d1c9665db6e3d4aeca62eb669377162ebc6fdf"}, {"url": "https://git.kernel.org/stable/c/4e15e89faac9f308baeb01f46c13a051814d2449"}], "title": "net: bnxt: ring the doorbell when SW USO exits early", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_gso.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "48d1c9665db6e3d4aeca62eb669377162ebc6fdf", "status": "affected", "version": "cc5d90667db81474ed7a92a1b2fa3daec5559307", "versionType": "git"}, {"lessThan": "4e15e89faac9f308baeb01f46c13a051814d2449", "status": "affected", "version": "cc5d90667db81474ed7a92a1b2fa3daec5559307", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "drivers/net/ethernet/broadcom/bnxt/bnxt_gso.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "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\nnet: bnxt: ring the doorbell when SW USO exits early\n\nWhen a burst of packets is handed down to the driver, the driver defers\nthe doorbell to the end by setting txr->kick_pending = 1. The normal TX\npath handles this, but the SW USO path can miss it if it returns\nearly.\n\nIf bnxt_sw_udp_gso_xmit runs but returns early with NETDEV_TX_BUSY and\ntxr->kick_pending was previously set to 1, then the TX queue can\nstall because the driver wrote some BDs but never wrote the doorbell.\nThe device won't know to do the TX which would generate the completion\nthat would wake the queue back up.\n\nSimplify bnxt_sw_udp_gso_xmit to set txr->kick_pending in its success\ncase and check the flag on return. The added check after\nbnxt_sw_udp_gso_xmit returns ensures that any pending doorbells are\nwritten handling both successful USO and any early returns, which\nprevents the TX queue stall mentioned above.\n\nThis TX queue stall was observed on a production system with a netdev TX\nwatchdog informing about the queue stall."}], "id": "CVE-2026-80998", "lastModified": "2026-09-11T20:19:06.873", "metrics": {}, "published": "2026-09-11T20:19:06.873", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/48d1c9665db6e3d4aeca62eb669377162ebc6fdf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4e15e89faac9f308baeb01f46c13a051814d2449"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel bnxt driver: Denial of Service due to network transmit queue stall", "id": "2532129", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532129"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-841", "details": ["A flaw was found in the Linux kernel's `bnxt` network driver. When processing a burst of packets, the driver may fail to notify the network device (ring the doorbell) if the Software UDP Segmentation Offload (SW USO) path exits prematurely. This oversight can lead to a transmit (TX) queue stall, rendering the network interface unresponsive and causing a Denial of Service (DoS) for network communications."], "name": "CVE-2026-80998", "public_date": "2026-09-11T19:42:52Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80998\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80998\nhttps://git.kernel.org/stable/c/48d1c9665db6e3d4aeca62eb669377162ebc6fdf\nhttps://git.kernel.org/stable/c/4e15e89faac9f308baeb01f46c13a051814d2449"], "threat_severity": "Moderate"}

{}