CVE-2026-74622

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Slots that were consumed but not yet reposted therefore\nsit in the complementary [sw_tail, sw_head) gap with a live page, and\nthe deinit walk never visits them: up to a refill batch worth of pages\nand DMA mappings leak on every interface down.\n\nWalk the whole ring instead and release whatever is still there. Also\nbail out if the buffer ring is already gone: a partial\naq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so\naq_ptp_ring_deinit() still gets here on the unwind 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/aquantia/atlantic/aq_ring.c"], "versions": [{"version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86", "lessThan": "1e58b0bab40dcbdfc04acaba6a221d40801c3770", "status": "affected", "versionType": "git"}, {"version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86", "lessThan": "30c473ea097ef0c93b064281b3e295c97d17e28b", "status": "affected", "versionType": "git"}, {"version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86", "lessThan": "17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac", "status": "affected", "versionType": "git"}, {"version": "46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86", "lessThan": 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Since the page reuse strategy was added, a cleaned RX buffer\nkeeps its page (and its DMA mapping) in the ring for reuse, and refill\nis batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES\nslots are free. Slots that were consumed but not yet reposted therefore\nsit in the complementary [sw_tail, sw_head) gap with a live page, and\nthe deinit walk never visits them: up to a refill batch worth of pages\nand DMA mappings leak on every interface down.\n\nWalk the whole ring instead and release whatever is still there. Also\nbail out if the buffer ring is already gone: a partial\naq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so\naq_ptp_ring_deinit() still gets here on the unwind path."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: atlantic: liberar p\u00e1ginas RX de b\u00faferes consumidos pero no rellenados\n\naq_ring_rx_deinit() solo recorre [sw_head, sw_tail), la regi\u00f3n publicada al hardware. Desde que se a\u00f1adi\u00f3 la estrategia de reutilizaci\u00f3n de p\u00e1ginas, un b\u00fafer RX limpiado mantiene su p\u00e1gina (y su mapeo DMA) en el anillo para su reutilizaci\u00f3n, y el rellenado se realiza por lotes: aq_ring_rx_fill() retorna anticipadamente hasta que AQ_CFG_RX_REFILL_THRES ranuras est\u00e9n libres. Las ranuras que fueron consumidas pero a\u00fan no republicadas, por lo tanto, se encuentran en el hueco complementario [sw_tail, sw_head) con una p\u00e1gina activa, y el recorrido de desinicializaci\u00f3n nunca las visita: hasta un lote de rellenado de p\u00e1ginas y mapeos DMA se fugan en cada bajada de interfaz.\n\nRecorrer todo el anillo en su lugar y liberar lo que a\u00fan est\u00e9 all\u00ed. Tambi\u00e9n salir si el anillo de b\u00fafer ya no existe: un fallo parcial de aq_ptp_ring_alloc() libera el anillo pero deja aq_nic establecido, por lo que aq_ptp_ring_deinit() a\u00fan llega aqu\u00ed en la ruta de desenrollado."}], "id": "CVE-2026-74622", "lastModified": "2026-11-06T17:19:51.830", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74622", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T17:00:08.705706Z", "version": "2.0.3"}}]}, "published": "2026-08-22T16:16:35.027", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1e58b0bab40dcbdfc04acaba6a221d40801c3770"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/24d87dc28ddd3771dd0e88719209811809729439"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/30c473ea097ef0c93b064281b3e295c97d17e28b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/64e1346bc66b947eb80b848e4c8d9828ba50e0fe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/782cc40b7ade4614a8aec0b948b8cf95c69f8d4b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e8e7471ef686b6c002218fee9671cc61992ae01a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ff451bc4290b79c04f1c5cfa928d448f9d47ecf5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net: atlantic: free RX pages of consumed but not refilled buffers", "id": "2521472", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521472"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet: atlantic: free RX pages of consumed but not refilled buffers\naq_ring_rx_deinit() only walks [sw_head, sw_tail), the region posted to\nhardware. Since the page reuse strategy was added, a cleaned RX buffer\nkeeps its page (and its DMA mapping) in the ring for reuse, and refill\nis batched: aq_ring_rx_fill() returns early until AQ_CFG_RX_REFILL_THRES\nslots are free. Slots that were consumed but not yet reposted therefore\nsit in the complementary [sw_tail, sw_head) gap with a live page, and\nthe deinit walk never visits them: up to a refill batch worth of pages\nand DMA mappings leak on every interface down.\nWalk the whole ring instead and release whatever is still there. Also\nbail out if the buffer ring is already gone: a partial\naq_ptp_ring_alloc() failure frees the ring but leaves aq_nic set, so\naq_ptp_ring_deinit() still gets here on the unwind path.", "A flaw was found in the Linux kernel's 'atlantic' network driver. The `aq_ring_rx_deinit()` function, responsible for deinitializing receive (RX) buffers, fails to properly free pages and their associated Direct Memory Access (DMA) mappings for buffers that have been consumed but not yet refilled. This oversight leads to a memory leak each time a network interface utilizing this driver is brought down. Repeated occurrences of this memory leak could eventually result in a Denial of Service (DoS) due to resource exhaustion."], "name": "CVE-2026-74622", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74622\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74622\nhttps://lore.kernel.org/linux-cve-announce/2026082219-CVE-2026-74622-505f@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86,1e58b0bab40dcbdfc04acaba6a221d40801c3770)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86,30c473ea097ef0c93b064281b3e295c97d17e28b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86,17c99dd86f169c7a3e73d6778e79ef5b1ed3ceac)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86,ff451bc4290b79c04f1c5cfa928d448f9d47ecf5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86,64e1346bc66b947eb80b848e4c8d9828ba50e0fe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86,782cc40b7ade4614a8aec0b948b8cf95c69f8d4b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86,24d87dc28ddd3771dd0e88719209811809729439)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[46f4c29d9de6e4a9d4ed7de9a37dd42501d89f86,e8e7471ef686b6c002218fee9671cc61992ae01a)"}}], "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": "5.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.265,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.216,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.183,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.152,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.104,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.45,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.9,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "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": "2026-08-22T18:15:03.350160+00:00", "updated": "2026-08-25T16:00:15.263337+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}