{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23454", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:46.020Z", "datePublished": "2026-04-03T15:15:36.189Z", "dateUpdated": "2026-04-03T15:15:36.189Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-03T15:15:36.189Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/microsoft/mana/hw_channel.c"], "versions": [{"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f", "lessThan": "e23bf444512cb85d76012080a76cd1f9e967448e", "status": "affected", "versionType": "git"}, {"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f", "lessThan": "249e905571583a434d4ea8d6f92ccc0eef337115", "status": "affected", "versionType": "git"}, {"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f", "lessThan": "2b001901f689021acd7bf2dceed74a1bdcaaa1f9", "status": "affected", "versionType": "git"}, {"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f", "lessThan": "afdb1533eb9c05432aeb793a7280fa827c502f5c", "status": "affected", "versionType": "git"}, {"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f", "lessThan": "05d345719d85b927cba74afac4d5322de3aa4256", "status": "affected", "versionType": "git"}, {"version": "ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f", "lessThan": "fa103fc8f56954a60699a29215cb713448a39e87", "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/microsoft/mana/hw_channel.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.20", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.10", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0-rc5", "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": "5.13", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.18.20"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.19.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.0-rc5"}]}]}], "references": [{"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"}}}}

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{"cveTags": [], "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."}], "id": "CVE-2026-23454", "lastModified": "2026-04-03T16:16:31.947", "metrics": {}, "published": "2026-04-03T16:16:31.947", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/05d345719d85b927cba74afac4d5322de3aa4256"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/249e905571583a434d4ea8d6f92ccc0eef337115"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b001901f689021acd7bf2dceed74a1bdcaaa1f9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/afdb1533eb9c05432aeb793a7280fa827c502f5c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e23bf444512cb85d76012080a76cd1f9e967448e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fa103fc8f56954a60699a29215cb713448a39e87"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}