CVE-2026-98592

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98592", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.359Z", "datePublished": "2026-10-18T15:19:04.373Z", "dateUpdated": "2026-10-19T09:22:17.811Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:22:17.811Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: spacemit: clear TX descriptor on fragment mapping failure\n\nemac_tx_mem_map() writes TX_DESC_0_OWN into the ring descriptor for\nevery slot beyond old_head as soon as that slot's memset()'d local\ncopy is committed with \"*tx_desc_addr = tx_desc\", i.e. before the\nbuffers for that slot have necessarily all been mapped successfully.\nIf emac_tx_map_frag() then fails on a later fragment, the err_free_skb\npath calls emac_free_tx_buf() to unmap and drop the skb, but leaves\nthe already-written descriptor memory untouched, and tx_ring->head is\nnever advanced past old_head (the \"tx_ring->head = head\" store is\nskipped by the goto).\n\nSo a slot between old_head and the rolled-back head can be left with\nTX_DESC_0_OWN set and buffer_addr_{1,2} pointing at DMA mappings that\nemac_free_tx_buf() just tore down, while software considers that slot\nfree again. The next successful emac_tx_mem_map() call only rebuilds\nold_head itself; if the DMA engine auto-advances into the following\ndescriptor once it finishes old_head's packet, it will fetch that\nstale, already-unmapped address.\n\nemac_tx_clean_desc() already treats emac_free_tx_buf() and clearing\nthe descriptor as a pair when reclaiming completed descriptors; do\nthe same in the mapping failure path."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/spacemit/k1_emac.c"], "versions": [{"version": "bfec6d7f2001c7470c3cd261ae65a3ba8737f226", "lessThan": "ca9986cc824f2feb79b4a83e5f6f4c24c2140448", "status": "affected", "versionType": "git"}, {"version": "bfec6d7f2001c7470c3cd261ae65a3ba8737f226", "lessThan": "3001a103a367c6051c43aff363b6979c10e65347", "status": "affected", "versionType": "git"}, {"version": "bfec6d7f2001c7470c3cd261ae65a3ba8737f226", "lessThan": "2d14720beb58870b15a52b236c3ab0be0e06e915", "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/spacemit/k1_emac.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "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": "6.18", "versionEndExcluding": "6.18.55"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ca9986cc824f2feb79b4a83e5f6f4c24c2140448"}, {"url": "https://git.kernel.org/stable/c/3001a103a367c6051c43aff363b6979c10e65347"}, {"url": "https://git.kernel.org/stable/c/2d14720beb58870b15a52b236c3ab0be0e06e915"}], "title": "net: spacemit: clear TX descriptor on fragment mapping failure", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/spacemit/k1_emac.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ca9986cc824f2feb79b4a83e5f6f4c24c2140448", "status": "affected", "version": "bfec6d7f2001c7470c3cd261ae65a3ba8737f226", "versionType": "git"}, {"lessThan": "3001a103a367c6051c43aff363b6979c10e65347", "status": "affected", "version": "bfec6d7f2001c7470c3cd261ae65a3ba8737f226", "versionType": "git"}, {"lessThan": "2d14720beb58870b15a52b236c3ab0be0e06e915", "status": "affected", "version": "bfec6d7f2001c7470c3cd261ae65a3ba8737f226", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/spacemit/k1_emac.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"lessThan": "6.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "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\nnet: spacemit: clear TX descriptor on fragment mapping failure\n\nemac_tx_mem_map() writes TX_DESC_0_OWN into the ring descriptor for\nevery slot beyond old_head as soon as that slot's memset()'d local\ncopy is committed with \"*tx_desc_addr = tx_desc\", i.e. before the\nbuffers for that slot have necessarily all been mapped successfully.\nIf emac_tx_map_frag() then fails on a later fragment, the err_free_skb\npath calls emac_free_tx_buf() to unmap and drop the skb, but leaves\nthe already-written descriptor memory untouched, and tx_ring->head is\nnever advanced past old_head (the \"tx_ring->head = head\" store is\nskipped by the goto).\n\nSo a slot between old_head and the rolled-back head can be left with\nTX_DESC_0_OWN set and buffer_addr_{1,2} pointing at DMA mappings that\nemac_free_tx_buf() just tore down, while software considers that slot\nfree again. The next successful emac_tx_mem_map() call only rebuilds\nold_head itself; if the DMA engine auto-advances into the following\ndescriptor once it finishes old_head's packet, it will fetch that\nstale, already-unmapped address.\n\nemac_tx_clean_desc() already treats emac_free_tx_buf() and clearing\nthe descriptor as a pair when reclaiming completed descriptors; do\nthe same in the mapping failure path."}], "id": "CVE-2026-98592", "lastModified": "2026-10-19T10:19:20.360", "metrics": {}, "published": "2026-10-18T16:17:11.830", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2d14720beb58870b15a52b236c3ab0be0e06e915"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3001a103a367c6051c43aff363b6979c10e65347"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca9986cc824f2feb79b4a83e5f6f4c24c2140448"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: spacemit: clear TX descriptor on fragment mapping failure", "id": "2554985", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554985"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: spacemit: clear TX descriptor on fragment mapping failure\nemac_tx_mem_map() writes TX_DESC_0_OWN into the ring descriptor for\nevery slot beyond old_head as soon as that slot's memset()'d local\ncopy is committed with \"*tx_desc_addr = tx_desc\", i.e. before the\nbuffers for that slot have necessarily all been mapped successfully.\nIf emac_tx_map_frag() then fails on a later fragment, the err_free_skb\npath calls emac_free_tx_buf() to unmap and drop the skb, but leaves\nthe already-written descriptor memory untouched, and tx_ring->head is\nnever advanced past old_head (the \"tx_ring->head = head\" store is\nskipped by the goto).\nSo a slot between old_head and the rolled-back head can be left with\nTX_DESC_0_OWN set and buffer_addr_{1,2} pointing at DMA mappings that\nemac_free_tx_buf() just tore down, while software considers that slot\nfree again. The next successful emac_tx_mem_map() call only rebuilds\nold_head itself; if the DMA engine auto-advances into the following\ndescriptor once it finishes old_head's packet, it will fetch that\nstale, already-unmapped address.\nemac_tx_clean_desc() already treats emac_free_tx_buf() and clearing\nthe descriptor as a pair when reclaiming completed descriptors; do\nthe same in the mapping failure path.", "A flaw was found in the Linux kernel's SpacemiT Ethernet driver. During network packet transmission, a failure to map packet fragments causes the driver to release memory buffers without properly clearing the corresponding hardware descriptors. A local user able to trigger transmission mapping errors can cause the network controller's Direct Memory Access (DMA) engine to access unmapped memory, potentially resulting in memory corruption or a Denial of Service (DoS) through a system crash."], "name": "CVE-2026-98592", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98592\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98592\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98592.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bfec6d7f2001c7470c3cd261ae65a3ba8737f226,ca9986cc824f2feb79b4a83e5f6f4c24c2140448)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bfec6d7f2001c7470c3cd261ae65a3ba8737f226,3001a103a367c6051c43aff363b6979c10e65347)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bfec6d7f2001c7470c3cd261ae65a3ba8737f226,2d14720beb58870b15a52b236c3ab0e06e915)"}}], "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": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc5,*]"}}], "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": "2026-10-18T18:00:10.132904+00:00", "updated": "2026-10-20T21:30:17.899129+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}