{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-46178", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.103Z", "datePublished": "2026-05-28T09:36:32.222Z", "dateUpdated": "2026-08-05T12:30:16.484Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:30:16.484Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq()\n\nSashiko points out that mlx4_srq_alloc() was not undone during error\nunwind, add the missing call to mlx4_srq_free()." } ], "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 vulnerable path is reached only through the local RDMA uverbs device interface (/dev/infiniband/uverbsN) via a create-SRQ command with driver udata present; it is not reachable from a network peer.\nAC:L - The attacker reliably forces the failing path by supplying a bad/unmapped response buffer (`copy_to_user` → -EFAULT), which deterministically creates the dangling radix-tree pointer to freed memory; per UAF guidance this is Low.\nPR:L - Triggering requires only an unprivileged local account with access to the RDMA verbs device, which is commonly exposed to non-root users in HPC/cloud/RDMA-enabled environments; no real root is needed.\nUI:N - The attacker performs the create-SRQ call and supplies the faulting buffer entirely on their own; no victim action is required.\nS:U - The freed object and its corruption stay within the kernel's own security authority; there is no crossing of a VM/IOMMU/sandbox boundary.\nC:H - The dangling pointer is a use-after-free; reclaiming the freed `mlx4_ib_srq` lets an attacker control its contents and read kernel memory through the event-handler dereference chain.\nI:H - The UAF causes `mlx4_srq_event()` to write to freed memory and call function pointers (`srq->event`, `event_handler`) read from freed memory, giving a heap-spray-based control-flow-hijack / arbitrary-write primitive.\nA:H - Dereferencing the freed object reliably crashes the kernel, and repeatedly exercising the bug also exhausts the finite hardware SRQ/ICM resource pool, denying RDMA service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/infiniband/hw/mlx4/srq.c" ], "versions": [ { "version": "225c7b1feef1b41170f7037a5b10a65cd8a42c54", "lessThan": "53fd4c03558672ccb167754fbacbf045c7ab335c", "status": "affected", "versionType": "git" }, { "version": "225c7b1feef1b41170f7037a5b10a65cd8a42c54", "lessThan": "0be6ae614ca7fa53e7389e3c7462ed20abbd4192", "status": "affected", "versionType": "git" }, { "version": "225c7b1feef1b41170f7037a5b10a65cd8a42c54", "lessThan": "5b3b220d54e6a3d77380cb7caa1ef79cb8f4fc94", "status": "affected", "versionType": "git" }, { "version": "225c7b1feef1b41170f7037a5b10a65cd8a42c54", "lessThan": "c5dc30da990045105c9762248d23076223e7878a", "status": "affected", "versionType": "git" }, { "version": "225c7b1feef1b41170f7037a5b10a65cd8a42c54", "lessThan": "0dbd619716fb07b7de1acd64fec673ee6e1adde7", "status": "affected", "versionType": "git" }, { "version": "225c7b1feef1b41170f7037a5b10a65cd8a42c54", "lessThan": "e01b8c9286c470b71a38acd320106f2c4f2826a1", "status": "affected", "versionType": "git" }, { "version": "225c7b1feef1b41170f7037a5b10a65cd8a42c54", "lessThan": "388617f44d81604a760742a0b5de292d411e63e3", "status": "affected", "versionType": "git" }, { "version": "225c7b1feef1b41170f7037a5b10a65cd8a42c54", "lessThan": "c54c7e4cb679c0aaa1cb489b9c3f2cd98e63a44c", "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/mlx4/srq.c" ], "versions": [ { "version": "2.6.22", "status": "affected" }, { "version": "0", "lessThan": "2.6.22", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.88", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.7", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "2.6.22", "versionEndExcluding": "5.10.258" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "5.15.209" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.1.175" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.6.140" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.12.88" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.18.30" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "7.0.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/53fd4c03558672ccb167754fbacbf045c7ab335c" }, { "url": "https://git.kernel.org/stable/c/0be6ae614ca7fa53e7389e3c7462ed20abbd4192" }, { "url": "https://git.kernel.org/stable/c/5b3b220d54e6a3d77380cb7caa1ef79cb8f4fc94" }, { "url": "https://git.kernel.org/stable/c/c5dc30da990045105c9762248d23076223e7878a" }, { "url": "https://git.kernel.org/stable/c/0dbd619716fb07b7de1acd64fec673ee6e1adde7" }, { "url": "https://git.kernel.org/stable/c/e01b8c9286c470b71a38acd320106f2c4f2826a1" }, { "url": "https://git.kernel.org/stable/c/388617f44d81604a760742a0b5de292d411e63e3" }, { "url": "https://git.kernel.org/stable/c/c54c7e4cb679c0aaa1cb489b9c3f2cd98e63a44c" } ], "title": "RDMA/mlx4: Fix resource leak on error in mlx4_ib_create_srq()", "x_generator": { "engine": "bippy-1.2.0" } } } }