{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-90145", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.789Z", "datePublished": "2026-09-17T16:06:41.055Z", "dateUpdated": "2026-10-19T08:58:44.481Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:58:44.481Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhinic3: Fix skb linearization mismatch and drop skb when skb_checksum_help() failed\n\nPreviously, hinic3_send_one_skb() cached the skb fragment count before\ncalling hinic3_tx_offload(). If hinic3_tx_csum() falls back to\nskb_checksum_help() for unsupported tunnel packets, the skb may be\nlinearized. Continuing to build the TX descriptor with the stale\nfragment count leads to a descriptor mismatch, which can trigger\nout-of-bounds DMA reads or IOMMU faults.\n\nFurthermore, the old code ignored the return value of skb_checksum_help(),\ntransmitting corrupted packets with incomplete checksums upon failure.\n\nFix this by:\n1. Moving the hinic3_tx_offload() call before calculating 'num_sge' to\n ensure the correct fragment count is used if the SKB is linearized.\n2. Propagating skb_checksum_help() errors and returning\n HINIC3_TX_OFFLOAD_INVALID to properly drop the skb." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is in hinic3_send_one_skb(), reached only from hinic3_xmit_frame (ndo_start_xmit). Stale num_sge is caused by skb_checksum_help() linearizing a locally built encapsulated skb with SKBFL_SHARED_FRAG (sendfile/splice into GRE/Geneve/IPIP); no received protocol message supplies that fragment layout.\nAC:L - An attacker can sendfile/splice a non-GSO CHECKSUM_PARTIAL frame onto a non-VXLAN tunnel so hinic3_tx_csum() takes the unsupported-tunnel branch (l4_proto != UDP or dest != 4789) and skb_checksum_help() linearizes shared frags, desynchronizing the cached nr_frags with no race.\nPR:L - sendfile/splice on ordinary sockets needs no capability. On a host whose egress is a Geneve/GRE/IPIP overlay over hinic3, that traffic is encapsulated in-kernel and reaches hinic3_xmit_frame as an unprivileged local user (including from a container), without init-namespace CAP_NET_ADMIN.\nUI:N - The attacker triggers hinic3_tx_csum() by transmitting their own splice'd skb; no other user must mount media, open a file, or change configuration.\nS:U - hinic3_prepare_sq_ctrl() programs a wrong BUFDESC_NUM so the NIC DMA-reads leftover SQ buf_descs in host kernel context; that is not a guest-to-host escape, and unmapped IOVAs fault rather than bypass IOMMU policy.\nC:H - After skb_checksum_help() drops nr_frags, hinic3_tx_map_skb() fills only the remaining fragments while hinic3_prepare_sq_ctrl() still advertises the cached num_sge, so the NIC DMA-reads uninitialized SQ buf_descs (stale addresses/lengths) and can emit that host memory on the wire.\nI:N - SQ buf_descs carry only address/length for DMA_TO_DEVICE. hinic3_tx_map_skb() walks the post-linearize nr_frags and does not write out of bounds in the WQE, so there is no kernel write or control-flow primitive.\nA:H - The same stale BUFDESC_NUM makes the device DMA from leftover or unmapped IOVAs, which the fix describes as out-of-bounds DMA reads and IOMMU faults, and can stall the send queue when hardware walks garbage descriptors." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/huawei/hinic3/hinic3_tx.c" ], "versions": [ { "version": "17fcb3dc12bbee8ec3e32ca1f60898f252e06b2d", "lessThan": "e794cdc5c369c1b06359e2fe03a8d9270f56bead", "status": "affected", "versionType": "git" }, { "version": "17fcb3dc12bbee8ec3e32ca1f60898f252e06b2d", "lessThan": "96c3959770386b2913c62005f0d0c3151e0c01c3", "status": "affected", "versionType": "git" }, { "version": "17fcb3dc12bbee8ec3e32ca1f60898f252e06b2d", "lessThan": "d0c2bed6927cbfa2cb51f240b4812bf6916bce0e", "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/huawei/hinic3/hinic3_tx.c" ], "versions": [ { "version": "6.16", "status": "affected" }, { "version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.6", "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": "6.16", "versionEndExcluding": "6.18.52" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.2.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e794cdc5c369c1b06359e2fe03a8d9270f56bead" }, { "url": "https://git.kernel.org/stable/c/96c3959770386b2913c62005f0d0c3151e0c01c3" }, { "url": "https://git.kernel.org/stable/c/d0c2bed6927cbfa2cb51f240b4812bf6916bce0e" } ], "title": "hinic3: Fix skb linearization mismatch and drop skb when skb_checksum_help() failed", "x_generator": { "engine": "bippy-1.2.0" } } } }