{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-97573", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T16:01:01.156Z", "datePublished": "2026-09-25T10:21:57.443Z", "dateUpdated": "2026-10-19T09:09:35.902Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:09:35.902Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset()\n\nbnxt_rx_ring_reset() frees the ring buffers and then reallocates them,\nignoring the result.\n\nbnxt_alloc_one_rx_ring() can fail in bnxt_alloc_one_tpa_info_data(), which\nreturns -ENOMEM on the first failed allocation and leaves the remaining\nrxr->rx_tpa[] entries zeroed.\n\nThe error isn't propagated up, so the loop in bnxt_rx_ring_reset\ncontinues and at the end the code re-enables TPA with partially\nunallocated rx_tpa array.\n\nThis means that when the agg_id from hardware is mapped to a SW index in\nrxr->rx_tpa[], an uninitialized slot can be chosen which would hand a\nzero DMA address to the device.\n\nFix this by falling back to a global reset, which is what the existing\ncode already does when other functions fail, but unlike the other\nfailure cases this particular failure has to return because TPA can't\nbe re-enabled since the allocation failed." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The fixed function bnxt_rx_ring_reset() is a driver error path with no malformed input. What it damages is received data: bnxt_tpa_start() hands the NIC a stale rx_tpa[] mapping, and the NIC DMAs packet bytes sent by a remote host into that freed buffer. The remote peer supplies the data that gets written, so the vector is Network.\nAC:H - Two things must happen together. A pre-P5 chip must hit an RX buffer error, cons mismatch or ring-monitor event that schedules the per-ring reset, and the GFP_KERNEL refill in bnxt_alloc_one_tpa_info_data() must fail under memory pressure. A remote sender cannot force that allocation failure.\nPR:N - No authentication is involved. Any host that can send TCP traffic that the NIC aggregates with TPA (hardware GRO/LRO) fills the stale buffers and can also generate the traffic that leads to RX buffer errors.\nUI:N - No user action is needed. The reset runs from the bnxt sp_task workqueue, and the bad TPA slot is used as soon as TPA_START completions arrive.\nS:U - The corruption hits kernel memory on the host that owns the NIC, which is the same authority as the driver. No VM or other security boundary is crossed.\nC:H - bnxt_free_one_tpa_info_data() clears tpa_info->data but leaves tpa_info->mapping stale. The NIC then writes into a page returned to page_pool that can be reused, and a reused buffer carrying other data can end up delivered as the next RX packet.\nI:H - The device DMA-writes TCP payload bytes chosen by the remote sender into freed memory (bnxt_tpa_start() puts the stale mapping into rx_bd_haddr). That is a write into memory the kernel may have reused, with attacker-chosen contents.\nA:H - The NULL tpa_info->data is moved into rx_buf_ring by bnxt_tpa_start(). When that buffer is consumed, the RX path dereferences NULL, and on top of that the stray DMA corrupts memory, so the kernel crashes." } ] } ], "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" ], "versions": [ { "version": "8fbf58e17dce8f250dda9ad6b0a49b3041f0af14", "lessThan": "52fc97cbc3ba118aad84e7c001bf02ebe8496f70", "status": "affected", "versionType": "git" }, { "version": "8fbf58e17dce8f250dda9ad6b0a49b3041f0af14", "lessThan": "40b4a7bb6b0b872b45f017dbf211268de098b75c", "status": "affected", "versionType": "git" }, { "version": "8fbf58e17dce8f250dda9ad6b0a49b3041f0af14", "lessThan": "af9a2bdaba0b4ceb0fc5e5122ef3fc6b7e5a366a", "status": "affected", "versionType": "git" }, { "version": "8fbf58e17dce8f250dda9ad6b0a49b3041f0af14", "lessThan": "cfec9e7f15a56cb0104bac13d01e5d11e1ba84fb", "status": "affected", "versionType": "git" }, { "version": "8fbf58e17dce8f250dda9ad6b0a49b3041f0af14", "lessThan": "1a3670b6a6b5679fe56c5890157b344f091e64f8", "status": "affected", "versionType": "git" }, { "version": "8fbf58e17dce8f250dda9ad6b0a49b3041f0af14", "lessThan": "4a17c73c83798c2fa9c7920ad5a98803adce3e01", "status": "affected", "versionType": "git" }, { "version": "8fbf58e17dce8f250dda9ad6b0a49b3041f0af14", "lessThan": "8b2fd5c0aeda935294159206af9d6179282d425a", "status": "affected", "versionType": "git" }, { "version": "8fbf58e17dce8f250dda9ad6b0a49b3041f0af14", "lessThan": "961e2a17c5e3559b3f8654d2daabdd25a42e770a", "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" ], "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.271", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "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": "5.10", "versionEndExcluding": "5.10.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.111" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.2.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/52fc97cbc3ba118aad84e7c001bf02ebe8496f70" }, { "url": "https://git.kernel.org/stable/c/40b4a7bb6b0b872b45f017dbf211268de098b75c" }, { "url": "https://git.kernel.org/stable/c/af9a2bdaba0b4ceb0fc5e5122ef3fc6b7e5a366a" }, { "url": "https://git.kernel.org/stable/c/cfec9e7f15a56cb0104bac13d01e5d11e1ba84fb" }, { "url": "https://git.kernel.org/stable/c/1a3670b6a6b5679fe56c5890157b344f091e64f8" }, { "url": "https://git.kernel.org/stable/c/4a17c73c83798c2fa9c7920ad5a98803adce3e01" }, { "url": "https://git.kernel.org/stable/c/8b2fd5c0aeda935294159206af9d6179282d425a" }, { "url": "https://git.kernel.org/stable/c/961e2a17c5e3559b3f8654d2daabdd25a42e770a" } ], "title": "bnxt_en: Handle buffer allocation failure in bnxt_rx_ring_reset()", "x_generator": { 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