{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45910", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.084Z", "datePublished": "2026-05-27T12:17:24.619Z", "dateUpdated": "2026-05-30T10:45:53.742Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-30T10:45:53.742Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rxe: Fix race condition in QP timer handlers\n\nI encontered the following warning:\n WARNING: drivers/infiniband/sw/rxe/rxe_task.c:249 at rxe_sched_task+0x1c8/0x238 [rdma_rxe], CPU#0: swapper/0/0\n...\n libsha1 [last unloaded: ip6_udp_tunnel]\n CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G C 6.19.0-rc5-64k-v8+ #37 PREEMPT\n Tainted: [C]=CRAP\n Hardware name: Raspberry Pi 4 Model B Rev 1.2\n Call trace:\n rxe_sched_task+0x1c8/0x238 [rdma_rxe] (P)\n retransmit_timer+0x130/0x188 [rdma_rxe]\n call_timer_fn+0x68/0x4d0\n __run_timers+0x630/0x888\n...\n WARNING: drivers/infiniband/sw/rxe/rxe_task.c:38 at rxe_sched_task+0x1c0/0x238 [rdma_rxe], CPU#0: swapper/0/0\n...\n WARNING: drivers/infiniband/sw/rxe/rxe_task.c:111 at do_work+0x488/0x5c8 [rdma_rxe], CPU#3: kworker/u17:4/93400\n...\n refcount_t: underflow; use-after-free.\n WARNING: lib/refcount.c:28 at refcount_warn_saturate+0x138/0x1a0, CPU#3: kworker/u17:4/93400\n\nThe issue is caused by a race condition between retransmit_timer() and\nrxe_destroy_qp, leading to the Queue Pair's (QP) reference count dropping\nto zero during timer handler execution.\n\nIt seems this warning is harmless because rxe_qp_do_cleanup() will flush\nall pending timers and requests.\n\nExample of flow causing the issue:\n\nCPU0 CPU1\nretransmit_timer() {\n spin_lock_irqsave\n rxe_destroy_qp()\n __rxe_cleanup()\n __rxe_put() // qp->ref_count decrease to 0\n rxe_qp_do_cleanup() {\n if (qp->valid) {\n rxe_sched_task() {\n WARN_ON(rxe_read(task->qp) <= 0);\n }\n }\n spin_unlock_irqrestore\n}\n spin_lock_irqsave\n qp->valid = 0\n spin_unlock_irqrestore\n }\n\nEnsure the QP's reference count is maintained and its validity is checked\nwithin the timer callbacks by adding calls to rxe_get(qp) and corresponding\nrxe_put(qp) after use."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}}], "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_comp.c", "drivers/infiniband/sw/rxe/rxe_req.c"], "versions": [{"version": "d94671632572813e90bcf475bb4c7d51fbf20173", "lessThan": "756c93d6df7c3bc599f6590b8e5afead6a41de1c", "status": "affected", "versionType": "git"}, {"version": "d94671632572813e90bcf475bb4c7d51fbf20173", "lessThan": "3c2ae79fb19dfd67341c14f1e78a5f1744eacfe2", "status": "affected", "versionType": "git"}, {"version": "d94671632572813e90bcf475bb4c7d51fbf20173", "lessThan": "5ae9da022ee3c97e6469eabcddce9271501ddbad", "status": "affected", "versionType": "git"}, {"version": "d94671632572813e90bcf475bb4c7d51fbf20173", "lessThan": "da379ca16af3722f159860d91a99cb6976a7500f", "status": "affected", "versionType": "git"}, {"version": "d94671632572813e90bcf475bb4c7d51fbf20173", "lessThan": "87bf646921430e303176edc4eb07c30160361b73", "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_comp.c", "drivers/infiniband/sw/rxe/rxe_req.c"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.14", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.4", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.4", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.18.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.19.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/756c93d6df7c3bc599f6590b8e5afead6a41de1c"}, {"url": "https://git.kernel.org/stable/c/3c2ae79fb19dfd67341c14f1e78a5f1744eacfe2"}, {"url": "https://git.kernel.org/stable/c/5ae9da022ee3c97e6469eabcddce9271501ddbad"}, {"url": "https://git.kernel.org/stable/c/da379ca16af3722f159860d91a99cb6976a7500f"}, {"url": "https://git.kernel.org/stable/c/87bf646921430e303176edc4eb07c30160361b73"}], "title": "RDMA/rxe: Fix race condition in QP timer handlers", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/sw/rxe/rxe_comp.c", "drivers/infiniband/sw/rxe/rxe_req.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "756c93d6df7c3bc599f6590b8e5afead6a41de1c", "status": "affected", "version": "d94671632572813e90bcf475bb4c7d51fbf20173", "versionType": "git"}, {"lessThan": "3c2ae79fb19dfd67341c14f1e78a5f1744eacfe2", "status": "affected", "version": "d94671632572813e90bcf475bb4c7d51fbf20173", "versionType": "git"}, {"lessThan": "5ae9da022ee3c97e6469eabcddce9271501ddbad", "status": "affected", "version": "d94671632572813e90bcf475bb4c7d51fbf20173", "versionType": "git"}, {"lessThan": "da379ca16af3722f159860d91a99cb6976a7500f", "status": "affected", "version": "d94671632572813e90bcf475bb4c7d51fbf20173", "versionType": "git"}, {"lessThan": "87bf646921430e303176edc4eb07c30160361b73", "status": "affected", "version": "d94671632572813e90bcf475bb4c7d51fbf20173", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/sw/rxe/rxe_comp.c", "drivers/infiniband/sw/rxe/rxe_req.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"lessThan": "6.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.128", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.75", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.14", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "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 race condition in QP timer handlers\n\nI encontered the following warning:\n WARNING: drivers/infiniband/sw/rxe/rxe_task.c:249 at rxe_sched_task+0x1c8/0x238 [rdma_rxe], CPU#0: swapper/0/0\n...\n libsha1 [last unloaded: ip6_udp_tunnel]\n CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G C 6.19.0-rc5-64k-v8+ #37 PREEMPT\n Tainted: [C]=CRAP\n Hardware name: Raspberry Pi 4 Model B Rev 1.2\n Call trace:\n rxe_sched_task+0x1c8/0x238 [rdma_rxe] (P)\n retransmit_timer+0x130/0x188 [rdma_rxe]\n call_timer_fn+0x68/0x4d0\n __run_timers+0x630/0x888\n...\n WARNING: drivers/infiniband/sw/rxe/rxe_task.c:38 at rxe_sched_task+0x1c0/0x238 [rdma_rxe], CPU#0: swapper/0/0\n...\n WARNING: drivers/infiniband/sw/rxe/rxe_task.c:111 at do_work+0x488/0x5c8 [rdma_rxe], CPU#3: kworker/u17:4/93400\n...\n refcount_t: underflow; use-after-free.\n WARNING: lib/refcount.c:28 at refcount_warn_saturate+0x138/0x1a0, CPU#3: kworker/u17:4/93400\n\nThe issue is caused by a race condition between retransmit_timer() and\nrxe_destroy_qp, leading to the Queue Pair's (QP) reference count dropping\nto zero during timer handler execution.\n\nIt seems this warning is harmless because rxe_qp_do_cleanup() will flush\nall pending timers and requests.\n\nExample of flow causing the issue:\n\nCPU0 CPU1\nretransmit_timer() {\n spin_lock_irqsave\n rxe_destroy_qp()\n __rxe_cleanup()\n __rxe_put() // qp->ref_count decrease to 0\n rxe_qp_do_cleanup() {\n if (qp->valid) {\n rxe_sched_task() {\n WARN_ON(rxe_read(task->qp) <= 0);\n }\n }\n spin_unlock_irqrestore\n}\n spin_lock_irqsave\n qp->valid = 0\n spin_unlock_irqrestore\n }\n\nEnsure the QP's reference count is maintained and its validity is checked\nwithin the timer callbacks by adding calls to rxe_get(qp) and corresponding\nrxe_put(qp) after use."}], "id": "CVE-2026-45910", "lastModified": "2026-06-17T10:52:42.810", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-27T14:17:05.563", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c2ae79fb19dfd67341c14f1e78a5f1744eacfe2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5ae9da022ee3c97e6469eabcddce9271501ddbad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/756c93d6df7c3bc599f6590b8e5afead6a41de1c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/87bf646921430e303176edc4eb07c30160361b73"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/da379ca16af3722f159860d91a99cb6976a7500f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: RDMA/rxe: Fix race condition in QP timer handlers", "id": "2482098", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482098"}, "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-911", "details": ["A flaw was found in the Linux kernel's Remote Direct Memory Access (RDMA) RXE component. A race condition exists between the `retransmit_timer()` and `rxe_destroy_qp` functions. This can cause a Queue Pair (QP) reference count to underflow, leading to a use-after-free vulnerability. A local attacker could potentially leverage this to cause a denial of service or achieve arbitrary code execution."], "name": "CVE-2026-45910", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45910\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45910\nhttps://lore.kernel.org/linux-cve-announce/2026052722-CVE-2026-45910-ff0e@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d94671632572813e90bcf475bb4c7d51fbf20173,756c93d6df7c3bc599f6590b8e5afead6a41de1c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d94671632572813e90bcf475bb4c7d51fbf20173,3c2ae79fb19dfd67341c14f1e78a5f1744eacfe2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d94671632572813e90bcf475bb4c7d51fbf20173,5ae9da022ee3c97e6469eabcddce9271501ddbad)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d94671632572813e90bcf475bb4c7d51fbf20173,da379ca16af3722f159860d91a99cb6976a7500f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d94671632572813e90bcf475bb4c7d51fbf20173,87bf646921430e303176edc4eb07c30160361b73)"}}], "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": "6.4"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.4)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.128,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.75,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.14,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.4,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "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": "2026-05-27T17:45:33.034551+00:00", "updated": "2026-05-30T12:30:23.075073+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}