CVE-2026-97413

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97413", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T14:53:16.867Z", "datePublished": "2026-09-24T16:03:21.010Z", "dateUpdated": "2026-10-03T10:58:05.684Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:58:05.684Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs-srv: Fix integer underflow in process_read and process_write\n\nusr_len is read from a network-supplied message field (le16_to_cpu)\nand used to compute data_len = off - usr_len without validating that\nusr_len <= off. A malicious RDMA client can send usr_len > off causing\nan integer underflow, resulting in data_len wrapping to a huge size_t\nvalue which is then passed to the rdma_ev callback as a memory length,\nleading to out-of-bounds memory access.\n\nFix by reading and validating usr_len <= off before rtrs_srv_get_ops_ids()\nin both process_read() and process_write(), ensuring the early return\npath acquires no reference and has no resource leak."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - A remote peer RDMA-WRITE-WITH-IMM's a RTRS_MSG_READ or RTRS_MSG_WRITE carrying attacker-controlled usr_len; rtrs_srv_rdma_done() hands that buffer to process_io_req() then process_read()/process_write(). rtrs_srv_cm_init() listens with RDMA_PS_TCP on IPv6 port 1234 (RoCEv2/iWARP), which is IP-routable.\nAC:L - The peer sets le16 usr_len in the RTRS_MSG_READ/WRITE at chunk+off and the IMM payload that rtrs_srv_rdma_done() splits into msg_id and off. Choosing usr_len > off makes size_t data_len = off - usr_len wrap on every call; there is no race and no victim-held state.\nPR:N - rtrs_rdma_connect() admits the RDMA_CM CONNECT_REQUEST after checking only RTRS_MAGIC, protocol major version, and cid/uuid; process_info_req() then publishes chunk rkeys and moves to RTRS_SRV_CONNECTED with no credentials, so process_read()/process_write() run unauthenticated.\nUI:N - The attacker posts the RDMA-WRITE-WITH-IMM that rtrs_srv_rdma_done() delivers to process_read()/process_write(); no local user must mount a volume, open a file, or otherwise interact.\nS:U - process_read()/process_write() invoke rnbd_srv_rdma_ev() in the same host kernel that owns the chunk pages; the OOB access stays inside that kernel and does not escape a VM, guest, or IOMMU domain.\nC:H - Underflowed data_len makes usr = page_address(chunk)+off-usr_len point before the chunk. rnbd_srv_rdma_ev() reads the RNBD header there; a sprayed RNBD_MSG_OPEN does unbounded strlen(dev_name), and process_rdma() bio_add_virt_nofail()s a ~4GiB WRITE bvec that copies following linear-map pages onto a device the peer can read back.\nI:H - process_rdma() truncates the wrapped size_t to u32 and bio_add_virt_nofail() installs a ~4GiB bvec from the chunk page; submit_bio() of an RNBD_OP_READ therefore writes device data through that bvec into subsequent kernel linear-map pages, an out-of-bounds kernel write.\nA:H - rnbd_srv_rdma_ev() immediately loads hdr->type from the wrapped usr pointer, process_msg_open() strlen()s that OOB name, and the ~4GiB bio_add_virt_nofail() bvec walks into holes or MMIO in the linear map; any of those oops/panic the completion path and can be repeated at will."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/ulp/rtrs/rtrs-srv.c"], "versions": [{"version": "9cb837480424e78ed585376f944088246685aec3", "lessThan": "6b1e26e70d7ca9f0906af2283558a530eeb1f066", "status": "affected", "versionType": "git"}, {"version": "9cb837480424e78ed585376f944088246685aec3", "lessThan": "2c52b2afded988233cd4ccc185cf5147bbc77a76", "status": "affected", "versionType": "git"}, {"version": "9cb837480424e78ed585376f944088246685aec3", "lessThan": "b042b4947752df0b3d16e683ac09fb4f7f0e33e0", "status": "affected", "versionType": "git"}, {"version": "9cb837480424e78ed585376f944088246685aec3", "lessThan": "24ad03bfeda05fca04c56677e57fd3d6bc3e9978", "status": "affected", "versionType": "git"}, {"version": "9cb837480424e78ed585376f944088246685aec3", "lessThan": "c76e9123ab91a903396d26e6ab1b5caae5c6b149", "status": "affected", "versionType": "git"}, {"version": "9cb837480424e78ed585376f944088246685aec3", "lessThan": "54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5", "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/ulp/rtrs/rtrs-srv.c"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "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": "5.8", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6b1e26e70d7ca9f0906af2283558a530eeb1f066"}, {"url": "https://git.kernel.org/stable/c/2c52b2afded988233cd4ccc185cf5147bbc77a76"}, {"url": "https://git.kernel.org/stable/c/b042b4947752df0b3d16e683ac09fb4f7f0e33e0"}, {"url": "https://git.kernel.org/stable/c/24ad03bfeda05fca04c56677e57fd3d6bc3e9978"}, {"url": "https://git.kernel.org/stable/c/c76e9123ab91a903396d26e6ab1b5caae5c6b149"}, {"url": "https://git.kernel.org/stable/c/54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5"}], "title": "RDMA/rtrs-srv: Fix integer underflow in process_read and process_write", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/ulp/rtrs/rtrs-srv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6b1e26e70d7ca9f0906af2283558a530eeb1f066", "status": "affected", "version": "9cb837480424e78ed585376f944088246685aec3", "versionType": "git"}, {"lessThan": "2c52b2afded988233cd4ccc185cf5147bbc77a76", "status": "affected", "version": "9cb837480424e78ed585376f944088246685aec3", "versionType": "git"}, {"lessThan": "b042b4947752df0b3d16e683ac09fb4f7f0e33e0", "status": "affected", "version": "9cb837480424e78ed585376f944088246685aec3", "versionType": "git"}, {"lessThan": "24ad03bfeda05fca04c56677e57fd3d6bc3e9978", "status": "affected", "version": "9cb837480424e78ed585376f944088246685aec3", "versionType": "git"}, {"lessThan": "c76e9123ab91a903396d26e6ab1b5caae5c6b149", "status": "affected", "version": "9cb837480424e78ed585376f944088246685aec3", "versionType": "git"}, {"lessThan": "54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5", "status": "affected", "version": "9cb837480424e78ed585376f944088246685aec3", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/ulp/rtrs/rtrs-srv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.8"}, {"lessThan": "5.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "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/rtrs-srv: Fix integer underflow in process_read and process_write\n\nusr_len is read from a network-supplied message field (le16_to_cpu)\nand used to compute data_len = off - usr_len without validating that\nusr_len <= off. A malicious RDMA client can send usr_len > off causing\nan integer underflow, resulting in data_len wrapping to a huge size_t\nvalue which is then passed to the rdma_ev callback as a memory length,\nleading to out-of-bounds memory access.\n\nFix by reading and validating usr_len <= off before rtrs_srv_get_ops_ids()\nin both process_read() and process_write(), ensuring the early return\npath acquires no reference and has no resource leak."}], "id": "CVE-2026-97413", "lastModified": "2026-10-03T11:17:53.320", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-24T17:17:18.990", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/24ad03bfeda05fca04c56677e57fd3d6bc3e9978"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2c52b2afded988233cd4ccc185cf5147bbc77a76"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6b1e26e70d7ca9f0906af2283558a530eeb1f066"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b042b4947752df0b3d16e683ac09fb4f7f0e33e0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c76e9123ab91a903396d26e6ab1b5caae5c6b149"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: RDMA/rtrs-srv: Fix integer underflow in process_read and process_write", "id": "2540517", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540517"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-191", "details": ["A flaw was found in the Linux kernel's Remote Direct Memory Access (RDMA) subsystem. A malicious client can trigger an integer underflow by sending a specially crafted message with an oversized length field during read or write operations. This improper validation leads to an out-of-bounds memory access, potentially resulting in a system crash (Denial of Service) or memory corruption."], "name": "CVE-2026-97413", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97413\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97413\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97413.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,24ad03bfeda05fca04c56677e57fd3d6bc3e9978)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,c76e9123ab91a903396d26e6ab1b5caae5c6b149)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,54bf38b27afc08a0eb6b732f9c14eb8a4bcb66b5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.53)"}}], "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": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.111,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.53,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-09-24T23:15:20.656915+00:00", "updated": "2026-10-01T16:00:11.502428+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-131", "CWE-191"]}