CVE-2026-80864

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80864", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.798Z", "datePublished": "2026-09-04T15:55:18.791Z", "dateUpdated": "2026-10-30T12:31:20.192Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:31:20.192Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp\n\nrxe_qp_from_attr() handles IB_QP_MAX_DEST_RD_ATOMIC outside the\nIB_QP_STATE path, so it holds no state_lock and runs while the responder\ntask rxe_receiver() (recv_task on rxe_wq) is live. A modify_qp() setting\nonly that attribute calls free_rd_atomic_resources() then\nalloc_rd_atomic_resources(), swapping qp->resp.resources[] while\nrxe_prepare_res()/find_resource() walk it; free_rd_atomic_resources()\nalso leaves the cached pointer qp->resp.res dangling. A local\nunprivileged user can race the free/realloc into a use-after-free in\nrxe_receiver() (local DoS).\n\nDrain recv_task around the swap with rxe_disable_task()/rxe_enable_task(),\nas rxe_qp_reset() already does when tearing this array down, re-enabling\nonly after alloc_rd_atomic_resources() succeeds so the responder never\nresumes against a NULL qp->resp.resources on the ENOMEM path. Also clear\nqp->resp.res in free_rd_atomic_resources(), like the rxe_resp.c\ncompletion paths.\n\nReproduced under KASAN; the slab-use-after-free in rxe_receiver() is gone."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/sw/rxe/rxe_qp.c"], "versions": [{"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "87e40635d77aa19088550698c81eb295d5131f71", "status": "affected", "versionType": "git"}, {"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "82257379061c0a7aba6c77081d988339982af115", "status": "affected", "versionType": "git"}, {"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "0136b528b753c5a56e4d997ef20b86bb6750b8fb", "status": "affected", "versionType": "git"}, {"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "ffa4f0be69656be1755090f02db38d49816585c6", "status": "affected", "versionType": "git"}, {"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "d4cd32eb8bd2b0ffbdc7b1f3d82ce6a371f8f844", "status": "affected", "versionType": "git"}, {"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "60dfd47929cd1e7070daa810d40ce538d888410d", "status": "affected", "versionType": "git"}, {"version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "lessThan": "6f7014237405e7f032b5c53a82d9eccf6161c291", "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/sw/rxe/rxe_qp.c"], "versions": [{"version": "4.8", "status": "affected"}, {"version": "0", "lessThan": "4.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.108", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.49", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.13", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.3", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "4.8", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.108"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.49"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.1.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.2.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/87e40635d77aa19088550698c81eb295d5131f71"}, {"url": "https://git.kernel.org/stable/c/82257379061c0a7aba6c77081d988339982af115"}, {"url": "https://git.kernel.org/stable/c/0136b528b753c5a56e4d997ef20b86bb6750b8fb"}, {"url": "https://git.kernel.org/stable/c/ffa4f0be69656be1755090f02db38d49816585c6"}, {"url": "https://git.kernel.org/stable/c/d4cd32eb8bd2b0ffbdc7b1f3d82ce6a371f8f844"}, {"url": "https://git.kernel.org/stable/c/60dfd47929cd1e7070daa810d40ce538d888410d"}, {"url": "https://git.kernel.org/stable/c/6f7014237405e7f032b5c53a82d9eccf6161c291"}], "title": "RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/sw/rxe/rxe_qp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "87e40635d77aa19088550698c81eb295d5131f71", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}, {"lessThan": "82257379061c0a7aba6c77081d988339982af115", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}, {"lessThan": "0136b528b753c5a56e4d997ef20b86bb6750b8fb", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}, {"lessThan": "ffa4f0be69656be1755090f02db38d49816585c6", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}, {"lessThan": "d4cd32eb8bd2b0ffbdc7b1f3d82ce6a371f8f844", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}, {"lessThan": "60dfd47929cd1e7070daa810d40ce538d888410d", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}, {"lessThan": "6f7014237405e7f032b5c53a82d9eccf6161c291", "status": "affected", "version": "8700e3e7c4857d28ebaa824509934556da0b3e76", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/sw/rxe/rxe_qp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.8"}, {"lessThan": "4.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.108", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.49", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.13", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.3", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp\n\nrxe_qp_from_attr() handles IB_QP_MAX_DEST_RD_ATOMIC outside the\nIB_QP_STATE path, so it holds no state_lock and runs while the responder\ntask rxe_receiver() (recv_task on rxe_wq) is live. A modify_qp() setting\nonly that attribute calls free_rd_atomic_resources() then\nalloc_rd_atomic_resources(), swapping qp->resp.resources[] while\nrxe_prepare_res()/find_resource() walk it; free_rd_atomic_resources()\nalso leaves the cached pointer qp->resp.res dangling. A local\nunprivileged user can race the free/realloc into a use-after-free in\nrxe_receiver() (local DoS).\n\nDrain recv_task around the swap with rxe_disable_task()/rxe_enable_task(),\nas rxe_qp_reset() already does when tearing this array down, re-enabling\nonly after alloc_rd_atomic_resources() succeeds so the responder never\nresumes against a NULL qp->resp.resources on the ENOMEM path. Also clear\nqp->resp.res in free_rd_atomic_resources(), like the rxe_resp.c\ncompletion paths.\n\nReproduced under KASAN; the slab-use-after-free in rxe_receiver() is gone."}], "id": "CVE-2026-80864", "lastModified": "2026-10-30T13:20:13.103", "metrics": {}, "published": "2026-09-04T16:18:15.737", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0136b528b753c5a56e4d997ef20b86bb6750b8fb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/60dfd47929cd1e7070daa810d40ce538d888410d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6f7014237405e7f032b5c53a82d9eccf6161c291"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/82257379061c0a7aba6c77081d988339982af115"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/87e40635d77aa19088550698c81eb295d5131f71"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d4cd32eb8bd2b0ffbdc7b1f3d82ce6a371f8f844"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ffa4f0be69656be1755090f02db38d49816585c6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8700e3e7c4857d28ebaa824509934556da0b3e76,0136b528b753c5a56e4d997ef20b86bb6750b8fb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8700e3e7c4857d28ebaa824509934556da0b3e76,60dfd47929e7070daa810d40ce538d888410d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8700e3e7c4857d28ebaa824509934556da0b3e76,6f7014237405e7f032b5c53a82d9eccf6161c291)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8700e3e7c4857d28ebaa824509934556da0b3e76,d4cd32eb8bd2b0ffbdc7b1f3d82ce6a371f8f844)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8700e3e7c4857d28ebaa824509934556da0b3e76,ffa4f0be69656be1755090f02db38d49816585c6)"}}], "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": "generic", "value": "4.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.108,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.49,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.13,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.3,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-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": "2026-09-04T19:15:07.704669+00:00", "updated": "2026-09-05T02:15:06.488729+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}