{"api_version":"1","generated_at":"2026-08-22T19:32:47+00:00","cve":"CVE-2026-74698","urls":{"html":"https://cve.report/CVE-2026-74698","api":"https://cve.report/api/cve/CVE-2026-74698.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74698","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74698"},"summary":{"title":"net/mlx5e: fix BQL reset on SQ re-activation","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: fix BQL reset on SQ re-activation\n\nmlx5e_queue_start() deactivates and re-activates all channels but closes\nonly the queue being restarted. mlx5e_activate_txqsq() then\nunconditionally calls netdev_tx_reset_queue(), zeroing the BQL counters\nof channels that kept their in-flight TX WQEs. The next completion then\nover-charges and trips the BUG_ON() in dql_completed():\n\n  kernel BUG at lib/dynamic_queue_limits.c:99!\n  RIP: 0010:dql_completed+0x23d/0x280\n  Call Trace:\n   <IRQ>\n   mlx5e_poll_tx_cq+0x668/0xa60\n   mlx5e_napi_poll+0x5b/0x7b0\n   net_rx_action+0x15a/0x580\n\nReset BQL only when the SQ has no bytes in flight (sq->cc == sq->pc).\n\nIn the case that reset is skipped, the outstanding WQEs will eventually\ncomplete and rebalance the dql. The dql->limit is carried across the\nreset.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:44","updated_at":"2026-08-22 16:16:44"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d2897717cd222e575599d903d885c48602699800","name":"https://git.kernel.org/stable/c/d2897717cd222e575599d903d885c48602699800","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e7386770be1bf810bcd6af39d1e4bfeab3408430","name":"https://git.kernel.org/stable/c/e7386770be1bf810bcd6af39d1e4bfeab3408430","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/88664c48d7d1eca8e1ac92da85c89c26af741cf1","name":"https://git.kernel.org/stable/c/88664c48d7d1eca8e1ac92da85c89c26af741cf1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74698","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74698","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b2588ea40ec9472688289c1a644627c0f4a1f33f 88664c48d7d1eca8e1ac92da85c89c26af741cf1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b2588ea40ec9472688289c1a644627c0f4a1f33f d2897717cd222e575599d903d885c48602699800 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b2588ea40ec9472688289c1a644627c0f4a1f33f e7386770be1bf810bcd6af39d1e4bfeab3408430 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en_main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"88664c48d7d1eca8e1ac92da85c89c26af741cf1","status":"affected","version":"b2588ea40ec9472688289c1a644627c0f4a1f33f","versionType":"git"},{"lessThan":"d2897717cd222e575599d903d885c48602699800","status":"affected","version":"b2588ea40ec9472688289c1a644627c0f4a1f33f","versionType":"git"},{"lessThan":"e7386770be1bf810bcd6af39d1e4bfeab3408430","status":"affected","version":"b2588ea40ec9472688289c1a644627c0f4a1f33f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en_main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.17"},{"lessThan":"6.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.17","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: fix BQL reset on SQ re-activation\n\nmlx5e_queue_start() deactivates and re-activates all channels but closes\nonly the queue being restarted. mlx5e_activate_txqsq() then\nunconditionally calls netdev_tx_reset_queue(), zeroing the BQL counters\nof channels that kept their in-flight TX WQEs. The next completion then\nover-charges and trips the BUG_ON() in dql_completed():\n\n  kernel BUG at lib/dynamic_queue_limits.c:99!\n  RIP: 0010:dql_completed+0x23d/0x280\n  Call Trace:\n   <IRQ>\n   mlx5e_poll_tx_cq+0x668/0xa60\n   mlx5e_napi_poll+0x5b/0x7b0\n   net_rx_action+0x15a/0x580\n\nReset BQL only when the SQ has no bytes in flight (sq->cc == sq->pc).\n\nIn the case that reset is skipped, the outstanding WQEs will eventually\ncomplete and rebalance the dql. The dql->limit is carried across the\nreset."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:32:59.703Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/88664c48d7d1eca8e1ac92da85c89c26af741cf1"},{"url":"https://git.kernel.org/stable/c/d2897717cd222e575599d903d885c48602699800"},{"url":"https://git.kernel.org/stable/c/e7386770be1bf810bcd6af39d1e4bfeab3408430"}],"title":"net/mlx5e: fix BQL reset on SQ re-activation","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74698","datePublished":"2026-08-22T15:32:59.703Z","dateReserved":"2026-08-15T05:44:03.927Z","dateUpdated":"2026-08-22T15:32:59.703Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:44","lastModifiedDate":"2026-08-22 16:16:44","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74698","Ordinal":"1","Title":"net/mlx5e: fix BQL reset on SQ re-activation","CVE":"CVE-2026-74698","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74698","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: fix BQL reset on SQ re-activation\n\nmlx5e_queue_start() deactivates and re-activates all channels but closes\nonly the queue being restarted. mlx5e_activate_txqsq() then\nunconditionally calls netdev_tx_reset_queue(), zeroing the BQL counters\nof channels that kept their in-flight TX WQEs. The next completion then\nover-charges and trips the BUG_ON() in dql_completed():\n\n  kernel BUG at lib/dynamic_queue_limits.c:99!\n  RIP: 0010:dql_completed+0x23d/0x280\n  Call Trace:\n   <IRQ>\n   mlx5e_poll_tx_cq+0x668/0xa60\n   mlx5e_napi_poll+0x5b/0x7b0\n   net_rx_action+0x15a/0x580\n\nReset BQL only when the SQ has no bytes in flight (sq->cc == sq->pc).\n\nIn the case that reset is skipped, the outstanding WQEs will eventually\ncomplete and rebalance the dql. The dql->limit is carried across the\nreset.","Type":"Description","Title":"net/mlx5e: fix BQL reset on SQ re-activation"}]}}}