CVE-2026-72500

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72500", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.937Z", "datePublished": "2026-08-15T05:57:32.341Z", "dateUpdated": "2026-10-21T12:45:07.452Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:45:07.452Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Free SRQ toggle page after firmware teardown\n\nFree the toggle page only after firmware teardown completes so that\nan NQ interrupt arriving during bnxt_qplib_destroy_srq() won't write\nthe toggle values to an already-freed page. Move free_page() after\nbnxt_qplib_destroy_srq()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is triggered by destroying a user SRQ through the RDMA uverbs ioctl on /dev/infiniband/uverbs*; although RoCE peers can generate SRQ/NQ events, the premature free_page() only occurs in this local destroy path, not from remote packet handling alone.\nAC:L - An attacker controls SRQ teardown timing via ibv_destroy_srq and can reliably create the race by keeping QPs/posted receives active and/or soliciting SRQ threshold events (including from a cooperating RoCE peer) while destroy_srq runs through bnxt_qplib_destroy_srq firmware teardown.\nPR:L - Exploitation requires only local RDMA verbs access to create/destroy a user SRQ on a Gen P7 bnxt_re device; uverbs char devices are created world-accessible (0666) and RDMA is commonly granted to unprivileged HPC/cloud/Kubernetes workload users rather than real root.\nUI:N - No victim interaction is required beyond the attacker (or compromised local workload) invoking SRQ destroy on resources it already controls; remote peers may assist timing but do not need the victim to click, mount, or open files.\nS:C - On Kubernetes/HPC hosts that expose bnxt_re to containers/pods, triggering this host-kernel UAF from an unprivileged RDMA-enabled workload can corrupt host memory and enable container-to-host sandbox escape beyond the workload security boundary.\nC:H - This is a kernel write-after-free: an NQ interrupt writes a toggle value into a page already returned to the buddy allocator, enabling corruption of subsequently reallocated kernel objects and classic UAF-based information disclosure primitives.\nI:H - The interrupt path performs a controlled 4-byte write to freed kernel memory during destroy_srq, providing a heap corruption primitive that can be developed into arbitrary kernel write or code execution rather than being limited to a benign crash.\nA:H - Writing to a freed page during interrupt handling can oops/panic the kernel immediately, and repeated SRQ create/destroy cycles let an attacker reliably induce host-level denial of service on RDMA-enabled systems."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/hw/bnxt_re/ib_verbs.c"], "versions": [{"version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "lessThan": "3b6ecad5b9b0f7230ed725aafaf8c4ed9327a9bf", "status": "affected", "versionType": "git"}, {"version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "lessThan": "104a7ff382a58a83cae018925e3574c784e8274c", "status": "affected", "versionType": "git"}, {"version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "lessThan": "0adcd67f3d6f84835be682da0153f57f5c2f8036", "status": "affected", "versionType": "git"}, {"version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "lessThan": "131e2918b9b0529687e67e2e58047304027f095a", "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/infiniband/hw/bnxt_re/ib_verbs.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.12", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3b6ecad5b9b0f7230ed725aafaf8c4ed9327a9bf"}, {"url": "https://git.kernel.org/stable/c/104a7ff382a58a83cae018925e3574c784e8274c"}, {"url": "https://git.kernel.org/stable/c/0adcd67f3d6f84835be682da0153f57f5c2f8036"}, {"url": "https://git.kernel.org/stable/c/131e2918b9b0529687e67e2e58047304027f095a"}], "title": "RDMA/bnxt_re: Free SRQ toggle page after firmware teardown", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72500", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:51:15.063449Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:55:27.608Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-72500", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T18:51:15.063449Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T18:51:15.625Z"}}], "cna": {"title": "RDMA/bnxt_re: Free SRQ toggle page after firmware teardown", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is triggered by destroying a user SRQ through the RDMA uverbs ioctl on /dev/infiniband/uverbs*; although RoCE peers can generate SRQ/NQ events, the premature free_page() only occurs in this local destroy path, not from remote packet handling alone.\nAC:L - An attacker controls SRQ teardown timing via ibv_destroy_srq and can reliably create the race by keeping QPs/posted receives active and/or soliciting SRQ threshold events (including from a cooperating RoCE peer) while destroy_srq runs through bnxt_qplib_destroy_srq firmware teardown.\nPR:L - Exploitation requires only local RDMA verbs access to create/destroy a user SRQ on a Gen P7 bnxt_re device; uverbs char devices are created world-accessible (0666) and RDMA is commonly granted to unprivileged HPC/cloud/Kubernetes workload users rather than real root.\nUI:N - No victim interaction is required beyond the attacker (or compromised local workload) invoking SRQ destroy on resources it already controls; remote peers may assist timing but do not need the victim to click, mount, or open files.\nS:C - On Kubernetes/HPC hosts that expose bnxt_re to containers/pods, triggering this host-kernel UAF from an unprivileged RDMA-enabled workload can corrupt host memory and enable container-to-host sandbox escape beyond the workload security boundary.\nC:H - This is a kernel write-after-free: an NQ interrupt writes a toggle value into a page already returned to the buddy allocator, enabling corruption of subsequently reallocated kernel objects and classic UAF-based information disclosure primitives.\nI:H - The interrupt path performs a controlled 4-byte write to freed kernel memory during destroy_srq, providing a heap corruption primitive that can be developed into arbitrary kernel write or code execution rather than being limited to a benign crash.\nA:H - Writing to a freed page during interrupt handling can oops/panic the kernel immediately, and repeated SRQ create/destroy cycles let an attacker reliably induce host-level denial of service on RDMA-enabled systems."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "lessThan": "3b6ecad5b9b0f7230ed725aafaf8c4ed9327a9bf", "versionType": "git"}, {"status": "affected", "version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "lessThan": "104a7ff382a58a83cae018925e3574c784e8274c", "versionType": "git"}, {"status": "affected", "version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "lessThan": "0adcd67f3d6f84835be682da0153f57f5c2f8036", "versionType": "git"}, {"status": "affected", "version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "lessThan": "131e2918b9b0529687e67e2e58047304027f095a", "versionType": "git"}], "programFiles": ["drivers/infiniband/hw/bnxt_re/ib_verbs.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"status": "unaffected", "version": "0", "lessThan": "6.12", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.114", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/infiniband/hw/bnxt_re/ib_verbs.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/3b6ecad5b9b0f7230ed725aafaf8c4ed9327a9bf"}, {"url": "https://git.kernel.org/stable/c/104a7ff382a58a83cae018925e3574c784e8274c"}, {"url": "https://git.kernel.org/stable/c/0adcd67f3d6f84835be682da0153f57f5c2f8036"}, {"url": "https://git.kernel.org/stable/c/131e2918b9b0529687e67e2e58047304027f095a"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Free SRQ toggle page after firmware teardown\n\nFree the toggle page only after firmware teardown completes so that\nan NQ interrupt arriving during bnxt_qplib_destroy_srq() won't write\nthe toggle values to an already-freed page. Move free_page() after\nbnxt_qplib_destroy_srq()."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.114", "versionStartIncluding": "6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "6.12"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:45:07.452Z"}}}, "cveMetadata": {"cveId": "CVE-2026-72500", "state": "PUBLISHED", "dateUpdated": "2026-10-21T12:45:07.452Z", "dateReserved": "2026-08-09T03:40:39.937Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:57:32.341Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/bnxt_re/ib_verbs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3b6ecad5b9b0f7230ed725aafaf8c4ed9327a9bf", "status": "affected", "version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "versionType": "git"}, {"lessThan": "104a7ff382a58a83cae018925e3574c784e8274c", "status": "affected", "version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "versionType": "git"}, {"lessThan": "0adcd67f3d6f84835be682da0153f57f5c2f8036", "status": "affected", "version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "versionType": "git"}, {"lessThan": "131e2918b9b0529687e67e2e58047304027f095a", "status": "affected", "version": "181028a0d84cdcc7ac86d05cc49eaa416ce85c8b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/bnxt_re/ib_verbs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"lessThan": "6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/bnxt_re: Free SRQ toggle page after firmware teardown\n\nFree the toggle page only after firmware teardown completes so that\nan NQ interrupt arriving during bnxt_qplib_destroy_srq() won't write\nthe toggle values to an already-freed page. Move free_page() after\nbnxt_qplib_destroy_srq()."}], "id": "CVE-2026-72500", "lastModified": "2026-10-21T13:19:39.797", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72500", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T18:51:15.063449Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:24.320", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0adcd67f3d6f84835be682da0153f57f5c2f8036"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/104a7ff382a58a83cae018925e3574c784e8274c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/131e2918b9b0529687e67e2e58047304027f095a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3b6ecad5b9b0f7230ed725aafaf8c4ed9327a9bf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: RDMA/bnxt_re: Free SRQ toggle page after firmware teardown", "id": "2516869", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516869"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nRDMA/bnxt_re: Free SRQ toggle page after firmware teardown\nFree the toggle page only after firmware teardown completes so that\nan NQ interrupt arriving during bnxt_qplib_destroy_srq() won't write\nthe toggle values to an already-freed page. Move free_page() after\nbnxt_qplib_destroy_srq().", "A flaw was found in the Linux kernel's Remote Direct Memory Access (RDMA) Broadcom NetXtreme-E (bnxt_re) driver. This use-after-free vulnerability occurs because a specific memory page is released prematurely during the teardown process. A local attacker could exploit this timing issue, potentially leading to memory corruption and a denial of service."], "name": "CVE-2026-72500", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72500\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72500\nhttps://lore.kernel.org/linux-cve-announce/2026081540-CVE-2026-72500-b888@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[181028a0d84cdcc7ac86d05cc49eaa416ce85c8b,104a7ff382a58a83cae018925e3574c784e8274c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[181028a0d84cdcc7ac86d05cc49eaa416ce85c8b,0adcd67f3d84835be682da0153f57f5c2f8036)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[181028a0d84cdcc7ac86d05cc49eaa416ce85c8b,131e2918b9b0529687e67e2e58047304027f095a)"}}], "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": "semver", "value": "6.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "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": "2026-08-15T17:15:03.021810+00:00", "updated": "2026-08-22T04:00:12.154157+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}