{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43296", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.999Z", "datePublished": "2026-05-08T13:11:18.870Z", "dateUpdated": "2026-08-05T12:27:07.797Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:27:07.797Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-af: Workaround SQM/PSE stalls by disabling sticky\n\nNIX SQ manager sticky mode is known to cause stalls when multiple SQs\nshare an SMQ and transmit concurrently. Additionally, PSE may deadlock\non transitions between sticky and non-sticky transmissions. There is\nalso a credit drop issue observed when certain condition clocks are\ngated.\n\nwork around these hardware errata by:\n- Disabling SQM sticky operation:\n - Clear TM6 (bit 15)\n - Clear TM11 (bit 14)\n- Disabling sticky → non-sticky transition path that can deadlock PSE:\n - Clear TM5 (bit 23)\n- Preventing credit drops by keeping the control-flow clock enabled:\n - Set TM9 (bit 21)\n\nThese changes are applied via NIX_AF_SQM_DBG_CTL_STATUS. With this\nconfiguration the SQM/PSE maintain forward progress under load without\ncredit loss, at the cost of disabling sticky optimizations." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - An unauthenticated remote peer can induce ordinary transmit traffic through the OcteonTX2 NIC by sending network requests or packets that cause kernel/server responses. The affected condition is in the network transmit hardware path after driver initialization.\nAC:L - The stall/deadlock condition requires concurrent transmission from multiple SQs sharing an SMQ, which is a normal multi-queue configuration on multicore systems and can be driven with parallel network traffic. No attacker-uncontrollable race or rare configuration is required beyond having affected hardware.\nPR:N - The attacker does not need local privileges or administrative access to the host; network traffic that causes transmit responses is sufficient in a reasonable server deployment. Driver initialization/configuration is privileged, but the vulnerable runtime condition is reachable through normal packet transmission.\nUI:N - No victim user action is required after the affected system is running. The attacker can trigger transmit load remotely.\nS:U - The impact remains within the same kernel/device security authority. This is not a guest-to-host escape, IOMMU bypass, or cross-scope boundary violation.\nC:N - The bug is a hardware forward-progress erratum involving SQM/PSE stalls, deadlock, and credit loss. The fix does not indicate exposure of memory or packet contents.\nI:N - The issue does not provide an attacker with a write primitive or data modification capability. It affects transmit progress/credits rather than protected data integrity.\nA:H - The erratum can stall SQs or deadlock PSE under concurrent transmit load, causing loss of network transmit availability for the affected interface/device. Repeated remote traffic can sustain a denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c" ], "versions": [ { "version": "5d9b976d4480dc0dcfa3719b645636d2f0f9f156", "lessThan": "9a3fd301329474f449e75f86d8a4f6b9c603fd6c", "status": "affected", "versionType": "git" }, { "version": "5d9b976d4480dc0dcfa3719b645636d2f0f9f156", "lessThan": "d0b3c8a80336029d9356f429151eb27922d80a3c", "status": "affected", "versionType": "git" }, { "version": "5d9b976d4480dc0dcfa3719b645636d2f0f9f156", "lessThan": "36cc5a5e0178d5fb79e04173b8aa623b0108819a", "status": "affected", "versionType": "git" }, { "version": "5d9b976d4480dc0dcfa3719b645636d2f0f9f156", "lessThan": "d9b549b6951ba178ec14339a031cae65f4e43fe1", "status": "affected", "versionType": "git" }, { "version": "5d9b976d4480dc0dcfa3719b645636d2f0f9f156", "lessThan": "cec2ceb35ce7bc874c43812bb39200d6cf691b87", "status": "affected", "versionType": "git" }, { "version": "5d9b976d4480dc0dcfa3719b645636d2f0f9f156", "lessThan": "8052d0587fb14b85539c3a14a226586c0c3d6b4c", "status": "affected", "versionType": "git" }, { "version": "5d9b976d4480dc0dcfa3719b645636d2f0f9f156", "lessThan": "b7eba260a34e854e2487b8363c11976f082df00d", "status": "affected", "versionType": "git" }, { "version": "5d9b976d4480dc0dcfa3719b645636d2f0f9f156", "lessThan": "70e9a5760abfb6338d63994d4de6b0778ec795d6", "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/marvell/octeontx2/af/rvu_nix.c" ], "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.252", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.6", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "5.5", "versionEndExcluding": "5.10.252" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.202" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.1.165" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.128" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.19.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9a3fd301329474f449e75f86d8a4f6b9c603fd6c" }, { "url": "https://git.kernel.org/stable/c/d0b3c8a80336029d9356f429151eb27922d80a3c" }, { "url": "https://git.kernel.org/stable/c/36cc5a5e0178d5fb79e04173b8aa623b0108819a" }, { "url": "https://git.kernel.org/stable/c/d9b549b6951ba178ec14339a031cae65f4e43fe1" }, { "url": "https://git.kernel.org/stable/c/cec2ceb35ce7bc874c43812bb39200d6cf691b87" }, { "url": "https://git.kernel.org/stable/c/8052d0587fb14b85539c3a14a226586c0c3d6b4c" }, { "url": "https://git.kernel.org/stable/c/b7eba260a34e854e2487b8363c11976f082df00d" }, { "url": "https://git.kernel.org/stable/c/70e9a5760abfb6338d63994d4de6b0778ec795d6" } ], "title": "octeontx2-af: Workaround SQM/PSE stalls by disabling sticky", "x_generator": { "engine": "bippy-1.2.0" } } } }