{"api_version":"1","generated_at":"2026-04-19T01:14:40+00:00","cve":"CVE-2026-23454","urls":{"html":"https://cve.report/CVE-2026-23454","api":"https://cve.report/api/cve/CVE-2026-23454.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23454","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23454"},"summary":{"title":"net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown\n\nA potential race condition exists in mana_hwc_destroy_channel() where\nhwc->caller_ctx is freed before the HWC's Completion Queue (CQ) and\nEvent Queue (EQ) are destroyed. This allows an in-flight CQ interrupt\nhandler to dereference freed memory, leading to a use-after-free or\nNULL pointer dereference in mana_hwc_handle_resp().\n\nmana_smc_teardown_hwc() signals the hardware to stop but does not\nsynchronize against IRQ handlers already executing on other CPUs. The\nIRQ synchronization only happens in mana_hwc_destroy_cq() via\nmana_gd_destroy_eq() -> mana_gd_deregister_irq(). Since this runs\nafter kfree(hwc->caller_ctx), a concurrent mana_hwc_rx_event_handler()\ncan dereference freed caller_ctx (and rxq->msg_buf) in\nmana_hwc_handle_resp().\n\nFix this by reordering teardown to reverse-of-creation order: destroy\nthe TX/RX work queues and CQ/EQ before freeing hwc->caller_ctx. This\nensures all in-flight interrupt handlers complete before the memory they\naccess is freed.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-03 16:16:31","updated_at":"2026-04-18 09:16:27"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/249e905571583a434d4ea8d6f92ccc0eef337115","name":"https://git.kernel.org/stable/c/249e905571583a434d4ea8d6f92ccc0eef337115","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2b001901f689021acd7bf2dceed74a1bdcaaa1f9","name":"https://git.kernel.org/stable/c/2b001901f689021acd7bf2dceed74a1bdcaaa1f9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/05d345719d85b927cba74afac4d5322de3aa4256","name":"https://git.kernel.org/stable/c/05d345719d85b927cba74afac4d5322de3aa4256","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/afdb1533eb9c05432aeb793a7280fa827c502f5c","name":"https://git.kernel.org/stable/c/afdb1533eb9c05432aeb793a7280fa827c502f5c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e23bf444512cb85d76012080a76cd1f9e967448e","name":"https://git.kernel.org/stable/c/e23bf444512cb85d76012080a76cd1f9e967448e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fa103fc8f56954a60699a29215cb713448a39e87","name":"https://git.kernel.org/stable/c/fa103fc8f56954a60699a29215cb713448a39e87","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b88edf12fc3779521ae5f6f1584153b15f7da6df","name":"https://git.kernel.org/stable/c/b88edf12fc3779521ae5f6f1584153b15f7da6df","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23454","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23454","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f b88edf12fc3779521ae5f6f1584153b15f7da6df git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f e23bf444512cb85d76012080a76cd1f9e967448e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 249e905571583a434d4ea8d6f92ccc0eef337115 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 2b001901f689021acd7bf2dceed74a1bdcaaa1f9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f afdb1533eb9c05432aeb793a7280fa827c502f5c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f 05d345719d85b927cba74afac4d5322de3aa4256 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f fa103fc8f56954a60699a29215cb713448a39e87 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.203 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.167 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.130 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.78 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.20 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.10 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"23454","cve":"CVE-2026-23454","epss":"0.000320000","percentile":"0.090980000","score_date":"2026-04-18","updated_at":"2026-04-19 00:10:43"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/microsoft/mana/hw_channel.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"b88edf12fc3779521ae5f6f1584153b15f7da6df","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"e23bf444512cb85d76012080a76cd1f9e967448e","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"249e905571583a434d4ea8d6f92ccc0eef337115","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"2b001901f689021acd7bf2dceed74a1bdcaaa1f9","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"afdb1533eb9c05432aeb793a7280fa827c502f5c","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"05d345719d85b927cba74afac4d5322de3aa4256","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"},{"lessThan":"fa103fc8f56954a60699a29215cb713448a39e87","status":"affected","version":"ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/microsoft/mana/hw_channel.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.13"},{"lessThan":"5.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.167","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.20","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.167","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.130","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.78","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.20","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.10","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"5.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown\n\nA potential race condition exists in mana_hwc_destroy_channel() where\nhwc->caller_ctx is freed before the HWC's Completion Queue (CQ) and\nEvent Queue (EQ) are destroyed. This allows an in-flight CQ interrupt\nhandler to dereference freed memory, leading to a use-after-free or\nNULL pointer dereference in mana_hwc_handle_resp().\n\nmana_smc_teardown_hwc() signals the hardware to stop but does not\nsynchronize against IRQ handlers already executing on other CPUs. The\nIRQ synchronization only happens in mana_hwc_destroy_cq() via\nmana_gd_destroy_eq() -> mana_gd_deregister_irq(). Since this runs\nafter kfree(hwc->caller_ctx), a concurrent mana_hwc_rx_event_handler()\ncan dereference freed caller_ctx (and rxq->msg_buf) in\nmana_hwc_handle_resp().\n\nFix this by reordering teardown to reverse-of-creation order: destroy\nthe TX/RX work queues and CQ/EQ before freeing hwc->caller_ctx. This\nensures all in-flight interrupt handlers complete before the memory they\naccess is freed."}],"providerMetadata":{"dateUpdated":"2026-04-18T08:59:02.761Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b88edf12fc3779521ae5f6f1584153b15f7da6df"},{"url":"https://git.kernel.org/stable/c/e23bf444512cb85d76012080a76cd1f9e967448e"},{"url":"https://git.kernel.org/stable/c/249e905571583a434d4ea8d6f92ccc0eef337115"},{"url":"https://git.kernel.org/stable/c/2b001901f689021acd7bf2dceed74a1bdcaaa1f9"},{"url":"https://git.kernel.org/stable/c/afdb1533eb9c05432aeb793a7280fa827c502f5c"},{"url":"https://git.kernel.org/stable/c/05d345719d85b927cba74afac4d5322de3aa4256"},{"url":"https://git.kernel.org/stable/c/fa103fc8f56954a60699a29215cb713448a39e87"}],"title":"net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23454","datePublished":"2026-04-03T15:15:36.189Z","dateReserved":"2026-01-13T15:37:46.020Z","dateUpdated":"2026-04-18T08:59:02.761Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-03 16:16:31","lastModifiedDate":"2026-04-18 09:16:27","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23454","Ordinal":"1","Title":"net: mana: fix use-after-free in mana_hwc_destroy_channel() by r","CVE":"CVE-2026-23454","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23454","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown\n\nA potential race condition exists in mana_hwc_destroy_channel() where\nhwc->caller_ctx is freed before the HWC's Completion Queue (CQ) and\nEvent Queue (EQ) are destroyed. This allows an in-flight CQ interrupt\nhandler to dereference freed memory, leading to a use-after-free or\nNULL pointer dereference in mana_hwc_handle_resp().\n\nmana_smc_teardown_hwc() signals the hardware to stop but does not\nsynchronize against IRQ handlers already executing on other CPUs. The\nIRQ synchronization only happens in mana_hwc_destroy_cq() via\nmana_gd_destroy_eq() -> mana_gd_deregister_irq(). Since this runs\nafter kfree(hwc->caller_ctx), a concurrent mana_hwc_rx_event_handler()\ncan dereference freed caller_ctx (and rxq->msg_buf) in\nmana_hwc_handle_resp().\n\nFix this by reordering teardown to reverse-of-creation order: destroy\nthe TX/RX work queues and CQ/EQ before freeing hwc->caller_ctx. This\nensures all in-flight interrupt handlers complete before the memory they\naccess is freed.","Type":"Description","Title":"net: mana: fix use-after-free in mana_hwc_destroy_channel() by r"}]}}}