{"api_version":"1","generated_at":"2026-07-11T21:18:37+00:00","cve":"CVE-2026-53331","urls":{"html":"https://cve.report/CVE-2026-53331","api":"https://cve.report/api/cve/CVE-2026-53331.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53331","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53331"},"summary":{"title":"slimbus: qcom-ngd-ctrl: Avoid ABBA on tx_lock/ctrl->lock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nslimbus: qcom-ngd-ctrl: Avoid ABBA on tx_lock/ctrl->lock\n\nDuring the SSR/PDR down notification the tx_lock is taken with the\nintent to provide synchronization with active DMA transfers.\n\nBut during this period qcom_slim_ngd_down() is invoked, which ends up in\nslim_report_absent(), which takes the slim_controller lock. In multiple\nother codepaths these two locks are taken in the opposite order (i.e.\nslim_controller then tx_lock).\n\nThe result is a lockdep splat, and a possible deadlock:\n\n  rprocctl/449 is trying to acquire lock:\n  ffff00009793e620 (&ctrl->lock){+.+.}-{4:4}, at: slim_report_absent (drivers/slimbus/core.c:322) slimbus\n\n  but task is already holding lock:\n  ffff00009793fb50 (&ctrl->tx_lock){+.+.}-{4:4}, at: qcom_slim_ngd_ssr_pdr_notify (drivers/slimbus/qcom-ngd-ctrl.c:1475) slim_qcom_ngd_ctrl\n\n  which lock already depends on the new lock.\n\n  Possible unsafe locking scenario:\n\n        CPU0                    CPU1\n        ----                    ----\n   lock(&ctrl->tx_lock);\n                                lock(&ctrl->lock);\n                                lock(&ctrl->tx_lock);\n   lock(&ctrl->lock);\n\nThe assumption is that the comment refers to the desire to not call\nqcom_slim_ngd_exit_dma() while we have an ongoing DMA TX transaction.\nBut any such transaction is initiated and completed within a single\nqcom_slim_ngd_xfer_msg().\n\nPrior to calling qcom_slim_ngd_exit_dma() the slim_controller is torn\ndown, all child devices are notified that the slimbus is gone and the\nchild devices are removed.\n\nStop taking the tx_lock in qcom_slim_ngd_ssr_pdr_notify() to avoid the\ndeadlock.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-01 14:16:40","updated_at":"2026-07-01 14:16:40"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9f0d45d509b434c54da10e01f4ef8086e4583401","name":"https://git.kernel.org/stable/c/9f0d45d509b434c54da10e01f4ef8086e4583401","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3d1561537237c6cc1db76155183d8bbdac2339f0","name":"https://git.kernel.org/stable/c/3d1561537237c6cc1db76155183d8bbdac2339f0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dc4d5c57e012c2c669793deb1515a57bbc6bf5dd","name":"https://git.kernel.org/stable/c/dc4d5c57e012c2c669793deb1515a57bbc6bf5dd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9708eb50fd7343145b422be852f890212155d845","name":"https://git.kernel.org/stable/c/9708eb50fd7343145b422be852f890212155d845","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aad4337a21b9ad3ae8d668fa8678d05e26ecbaa8","name":"https://git.kernel.org/stable/c/aad4337a21b9ad3ae8d668fa8678d05e26ecbaa8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/55f2ea9ff83cc27a85526b14bc9b32f96a08d6ec","name":"https://git.kernel.org/stable/c/55f2ea9ff83cc27a85526b14bc9b32f96a08d6ec","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d54a221b0f3cd9e1f03f18104be34e02a8258fae","name":"https://git.kernel.org/stable/c/d54a221b0f3cd9e1f03f18104be34e02a8258fae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53331","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53331","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a899d324863a3d15ce0eea513884e1b73a758c58 3d1561537237c6cc1db76155183d8bbdac2339f0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a899d324863a3d15ce0eea513884e1b73a758c58 dc4d5c57e012c2c669793deb1515a57bbc6bf5dd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a899d324863a3d15ce0eea513884e1b73a758c58 d54a221b0f3cd9e1f03f18104be34e02a8258fae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a899d324863a3d15ce0eea513884e1b73a758c58 aad4337a21b9ad3ae8d668fa8678d05e26ecbaa8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a899d324863a3d15ce0eea513884e1b73a758c58 9f0d45d509b434c54da10e01f4ef8086e4583401 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a899d324863a3d15ce0eea513884e1b73a758c58 9708eb50fd7343145b422be852f890212155d845 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a899d324863a3d15ce0eea513884e1b73a758c58 55f2ea9ff83cc27a85526b14bc9b32f96a08d6ec git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.210 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.176 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.143 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.94 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.36 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.13 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"53331","cve":"CVE-2026-53331","epss":"0.001720000","percentile":"0.068810000","score_date":"2026-07-04","updated_at":"2026-07-05 00:02:27"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/slimbus/qcom-ngd-ctrl.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"3d1561537237c6cc1db76155183d8bbdac2339f0","status":"affected","version":"a899d324863a3d15ce0eea513884e1b73a758c58","versionType":"git"},{"lessThan":"dc4d5c57e012c2c669793deb1515a57bbc6bf5dd","status":"affected","version":"a899d324863a3d15ce0eea513884e1b73a758c58","versionType":"git"},{"lessThan":"d54a221b0f3cd9e1f03f18104be34e02a8258fae","status":"affected","version":"a899d324863a3d15ce0eea513884e1b73a758c58","versionType":"git"},{"lessThan":"aad4337a21b9ad3ae8d668fa8678d05e26ecbaa8","status":"affected","version":"a899d324863a3d15ce0eea513884e1b73a758c58","versionType":"git"},{"lessThan":"9f0d45d509b434c54da10e01f4ef8086e4583401","status":"affected","version":"a899d324863a3d15ce0eea513884e1b73a758c58","versionType":"git"},{"lessThan":"9708eb50fd7343145b422be852f890212155d845","status":"affected","version":"a899d324863a3d15ce0eea513884e1b73a758c58","versionType":"git"},{"lessThan":"55f2ea9ff83cc27a85526b14bc9b32f96a08d6ec","status":"affected","version":"a899d324863a3d15ce0eea513884e1b73a758c58","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/slimbus/qcom-ngd-ctrl.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.11"},{"lessThan":"5.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.94","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.36","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.210","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.176","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.143","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.94","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.36","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.13","versionStartIncluding":"5.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"5.11","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nslimbus: qcom-ngd-ctrl: Avoid ABBA on tx_lock/ctrl->lock\n\nDuring the SSR/PDR down notification the tx_lock is taken with the\nintent to provide synchronization with active DMA transfers.\n\nBut during this period qcom_slim_ngd_down() is invoked, which ends up in\nslim_report_absent(), which takes the slim_controller lock. In multiple\nother codepaths these two locks are taken in the opposite order (i.e.\nslim_controller then tx_lock).\n\nThe result is a lockdep splat, and a possible deadlock:\n\n  rprocctl/449 is trying to acquire lock:\n  ffff00009793e620 (&ctrl->lock){+.+.}-{4:4}, at: slim_report_absent (drivers/slimbus/core.c:322) slimbus\n\n  but task is already holding lock:\n  ffff00009793fb50 (&ctrl->tx_lock){+.+.}-{4:4}, at: qcom_slim_ngd_ssr_pdr_notify (drivers/slimbus/qcom-ngd-ctrl.c:1475) slim_qcom_ngd_ctrl\n\n  which lock already depends on the new lock.\n\n  Possible unsafe locking scenario:\n\n        CPU0                    CPU1\n        ----                    ----\n   lock(&ctrl->tx_lock);\n                                lock(&ctrl->lock);\n                                lock(&ctrl->tx_lock);\n   lock(&ctrl->lock);\n\nThe assumption is that the comment refers to the desire to not call\nqcom_slim_ngd_exit_dma() while we have an ongoing DMA TX transaction.\nBut any such transaction is initiated and completed within a single\nqcom_slim_ngd_xfer_msg().\n\nPrior to calling qcom_slim_ngd_exit_dma() the slim_controller is torn\ndown, all child devices are notified that the slimbus is gone and the\nchild devices are removed.\n\nStop taking the tx_lock in qcom_slim_ngd_ssr_pdr_notify() to avoid the\ndeadlock."}],"providerMetadata":{"dateUpdated":"2026-07-01T13:32:15.733Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3d1561537237c6cc1db76155183d8bbdac2339f0"},{"url":"https://git.kernel.org/stable/c/dc4d5c57e012c2c669793deb1515a57bbc6bf5dd"},{"url":"https://git.kernel.org/stable/c/d54a221b0f3cd9e1f03f18104be34e02a8258fae"},{"url":"https://git.kernel.org/stable/c/aad4337a21b9ad3ae8d668fa8678d05e26ecbaa8"},{"url":"https://git.kernel.org/stable/c/9f0d45d509b434c54da10e01f4ef8086e4583401"},{"url":"https://git.kernel.org/stable/c/9708eb50fd7343145b422be852f890212155d845"},{"url":"https://git.kernel.org/stable/c/55f2ea9ff83cc27a85526b14bc9b32f96a08d6ec"}],"title":"slimbus: qcom-ngd-ctrl: Avoid ABBA on tx_lock/ctrl->lock","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53331","datePublished":"2026-07-01T13:32:15.733Z","dateReserved":"2026-06-09T07:44:35.398Z","dateUpdated":"2026-07-01T13:32:15.733Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-01 14:16:40","lastModifiedDate":"2026-07-01 14:16:40","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53331","Ordinal":"1","Title":"slimbus: qcom-ngd-ctrl: Avoid ABBA on tx_lock/ctrl->lock","CVE":"CVE-2026-53331","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53331","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nslimbus: qcom-ngd-ctrl: Avoid ABBA on tx_lock/ctrl->lock\n\nDuring the SSR/PDR down notification the tx_lock is taken with the\nintent to provide synchronization with active DMA transfers.\n\nBut during this period qcom_slim_ngd_down() is invoked, which ends up in\nslim_report_absent(), which takes the slim_controller lock. In multiple\nother codepaths these two locks are taken in the opposite order (i.e.\nslim_controller then tx_lock).\n\nThe result is a lockdep splat, and a possible deadlock:\n\n  rprocctl/449 is trying to acquire lock:\n  ffff00009793e620 (&ctrl->lock){+.+.}-{4:4}, at: slim_report_absent (drivers/slimbus/core.c:322) slimbus\n\n  but task is already holding lock:\n  ffff00009793fb50 (&ctrl->tx_lock){+.+.}-{4:4}, at: qcom_slim_ngd_ssr_pdr_notify (drivers/slimbus/qcom-ngd-ctrl.c:1475) slim_qcom_ngd_ctrl\n\n  which lock already depends on the new lock.\n\n  Possible unsafe locking scenario:\n\n        CPU0                    CPU1\n        ----                    ----\n   lock(&ctrl->tx_lock);\n                                lock(&ctrl->lock);\n                                lock(&ctrl->tx_lock);\n   lock(&ctrl->lock);\n\nThe assumption is that the comment refers to the desire to not call\nqcom_slim_ngd_exit_dma() while we have an ongoing DMA TX transaction.\nBut any such transaction is initiated and completed within a single\nqcom_slim_ngd_xfer_msg().\n\nPrior to calling qcom_slim_ngd_exit_dma() the slim_controller is torn\ndown, all child devices are notified that the slimbus is gone and the\nchild devices are removed.\n\nStop taking the tx_lock in qcom_slim_ngd_ssr_pdr_notify() to avoid the\ndeadlock.","Type":"Description","Title":"slimbus: qcom-ngd-ctrl: Avoid ABBA on tx_lock/ctrl->lock"}]}}}