{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-21934", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-29T08:45:45.789Z", "datePublished": "2025-04-01T15:41:02.804Z", "dateUpdated": "2026-08-05T11:55:27.199Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:55:27.199Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrapidio: fix an API misues when rio_add_net() fails\n\nrio_add_net() calls device_register() and fails when device_register()\nfails. Thus, put_device() should be used rather than kfree(). Add\n\"mport->net = NULL;\" to avoid a use after free issue." } ], "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" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerability is reached only through the RIO_DEV_ADD ioctl on the local character device /dev/rio_mportN, which requires local access to the system. RapidIO is a board-level fabric interconnect, not an IP network path, so no remote or adjacent reachability exists.\nAC:L - The attacker controls both sides of the unlocked mport->net race: two concurrent RIO_DEV_ADD ioctls both allocate a net and both register a device named \"rnet_\" under the same parent, so the loser's device_register() fails deterministically with -EEXIST, and the sequence is freely retryable. Reclaiming the freed struct rio_net (which embeds a full struct device, landing in a common kmalloc cache) via standard heap spray is routine.\nPR:L - The driver performs no capable() or permission check on any ioctl path — access is gated purely by /dev/rio_mportN node permissions, and RapidIO deployments commonly delegate fabric enumeration to non-root userspace management daemons via group-accessible device nodes. An unprivileged user with access to the mport device node can fully drive the bug.\nUI:N - Exploitation is entirely self-driven through ioctl calls by the attacker's own process; no victim action, mount, or file open by another user is needed.\nS:U - The freed object, the corruption, and the resulting privilege gain all live within the kernel's own security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The dangling mport->net is used as a struct device parent and list head, so after slab reclamation the attacker can leak kernel pointers written back into the sprayed object and dereference attacker-influenced sysfs/kobject pointers, yielding arbitrary kernel memory disclosure.\nI:H - list_add_tail(&rdev->net_list, &rdev->net->devices) inserts into a freed, attacker-reclaimed list head, giving a controllable write-what-where primitive, and device_add() increments a refcount inside the freed object — both leverageable into arbitrary kernel memory write and control-flow hijack.\nA:H - Even without full exploitation, the use-after-free on mport->net and the subsequent double free via rio_free_net()/device_unregister() on freed memory reliably produce slab corruption, oops, or kernel panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/rapidio/devices/rio_mport_cdev.c" ], "versions": [ { "version": "e8de370188d098bb49483c287b44925957c3c9b6", "lessThan": "d4ec862ce80f64db923a1d942b5d11cf6fc87d36", "status": "affected", "versionType": "git" }, { "version": "e8de370188d098bb49483c287b44925957c3c9b6", "lessThan": "88ddad53e4cfb6de861c6d4fb7b25427f46baed5", "status": "affected", "versionType": "git" }, { "version": "e8de370188d098bb49483c287b44925957c3c9b6", "lessThan": "cdd9f58f7fe41a55fae4305ea51fc234769fd466", "status": "affected", "versionType": "git" }, { "version": "e8de370188d098bb49483c287b44925957c3c9b6", "lessThan": "a5f5e520e8fbc6294020ff8afa36f684d92c6e6a", "status": "affected", "versionType": "git" }, { "version": "e8de370188d098bb49483c287b44925957c3c9b6", "lessThan": "2537f01d57f08c527e40bbb5862aa6ff43344898", "status": "affected", "versionType": "git" }, { "version": "e8de370188d098bb49483c287b44925957c3c9b6", "lessThan": "22e4977141dfc6d109bf29b495bf2187b4250990", "status": "affected", "versionType": "git" }, { "version": "e8de370188d098bb49483c287b44925957c3c9b6", "lessThan": "f0aa4ee1cbbf7789907e5a3f6810de01c146c211", "status": "affected", "versionType": "git" }, { "version": "e8de370188d098bb49483c287b44925957c3c9b6", "lessThan": "b2ef51c74b0171fde7eb69b6152d3d2f743ef269", "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/rapidio/devices/rio_mport_cdev.c" ], "versions": [ { "version": "4.6", "status": "affected" }, { "version": "0", "lessThan": "4.6", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.291", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.235", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.179", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.131", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.83", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.19", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13.7", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14", "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": "4.6", "versionEndExcluding": "5.4.291" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.10.235" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.15.179" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.1.131" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.6.83" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.12.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.13.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d4ec862ce80f64db923a1d942b5d11cf6fc87d36" }, { "url": "https://git.kernel.org/stable/c/88ddad53e4cfb6de861c6d4fb7b25427f46baed5" }, { "url": "https://git.kernel.org/stable/c/cdd9f58f7fe41a55fae4305ea51fc234769fd466" }, { "url": "https://git.kernel.org/stable/c/a5f5e520e8fbc6294020ff8afa36f684d92c6e6a" }, { "url": "https://git.kernel.org/stable/c/2537f01d57f08c527e40bbb5862aa6ff43344898" }, { "url": "https://git.kernel.org/stable/c/22e4977141dfc6d109bf29b495bf2187b4250990" }, { "url": "https://git.kernel.org/stable/c/f0aa4ee1cbbf7789907e5a3f6810de01c146c211" }, { "url": "https://git.kernel.org/stable/c/b2ef51c74b0171fde7eb69b6152d3d2f743ef269" } ], "title": "rapidio: fix an API misues when rio_add_net() fails", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2025-21934", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-10-01T19:22:15.227028Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T19:26:33.096Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T19:39:30.684Z" } } ] } }