{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43283", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.998Z", "datePublished": "2026-05-06T11:29:03.726Z", "dateUpdated": "2026-08-05T12:27:03.376Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:27:03.376Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: ec_bhf: Fix dma_free_coherent() dma handle\n\ndma_free_coherent() in error path takes priv->rx_buf.alloc_len as\nthe dma handle. This would lead to improper unmapping of the buffer.\n\nChange the dma handle to priv->rx_buf.alloc_phys." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is reached by local netdevice administration via RTM_SETLINK or SIOCSIFFLAGS setting IFF_UP, which calls ec_bhf_open(). Received EtherCAT packets do not directly reach the bad dma_free_coherent() error path.\nAC:L - An attacker who can administer the netdev can repeatedly attempt link-up under memory pressure until TX coherent allocation fails after RX allocation succeeds. No race or external timing condition is required.\nPR:L - The path requires CAP_NET_ADMIN in the owning network namespace, and this physical netdev is movable because the driver does not mark it netns_immutable. In a reasonable delegated/container netns deployment, namespace admin privileges are sufficient.\nUI:N - No separate victim interaction is needed once the attacker has access to the local netlink/ioctl control path. The attacker can trigger the open error path directly with link-up attempts.\nS:C - The wrong DMA handle can leave a stale DMA/IOMMU mapping or free the wrong physical pages, allowing device DMA beyond the intended lifetime of the RX buffer. This crosses the intended DMA isolation boundary.\nC:H - Stale DMA access or freeing the wrong in-use pages can expose reused kernel memory through memory corruption. As a DMA lifetime/memory corruption issue, high confidentiality impact is defensible.\nI:H - The bug can let the device write received data into freed or incorrectly freed kernel memory, creating a kernel memory corruption primitive. Such corruption is potentially usable for arbitrary kernel memory modification or code execution.\nA:H - Passing an invalid DMA handle to dma_free_coherent() can corrupt allocator/IOMMU state or free the wrong pages. At minimum this can cause kernel warnings, oopses, or panics." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/ec_bhf.c" ], "versions": [ { "version": "6af55ff52b02d492d45db88df3e461fa51a6f753", "lessThan": "0f589ee54fd6d76d3f75e745f7f12c64cbd749e5", "status": "affected", "versionType": "git" }, { "version": "6af55ff52b02d492d45db88df3e461fa51a6f753", "lessThan": "accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0", "status": "affected", "versionType": "git" }, { "version": "6af55ff52b02d492d45db88df3e461fa51a6f753", "lessThan": "8320727be7ff704e07c87624efc2a4a75f54b3ce", "status": "affected", "versionType": "git" }, { "version": "6af55ff52b02d492d45db88df3e461fa51a6f753", "lessThan": "1e300c33ef3cc544c2b9c693778fe9490cfe9184", "status": "affected", "versionType": "git" }, { "version": "6af55ff52b02d492d45db88df3e461fa51a6f753", "lessThan": "1b1371cd4032ae859838ebc74215f569987bb197", "status": "affected", "versionType": "git" }, { "version": "6af55ff52b02d492d45db88df3e461fa51a6f753", "lessThan": "1b1d3c5d58a80a19d017a409aa2308162bab5bbf", "status": "affected", "versionType": "git" }, { "version": "6af55ff52b02d492d45db88df3e461fa51a6f753", "lessThan": "7e54ff938bebb173822b4c38b33fc164c1cabf92", "status": "affected", "versionType": "git" }, { "version": "6af55ff52b02d492d45db88df3e461fa51a6f753", "lessThan": "ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2", "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/net/ethernet/ec_bhf.c" ], "versions": [ { "version": "3.15", "status": "affected" }, { "version": "0", "lessThan": "3.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.252", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.202", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.165", "lessThanOrEqual": "6.1.*", "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": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.6", "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": "3.15", "versionEndExcluding": "5.10.252" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "5.15.202" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.1.165" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.6.128" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.12.75" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.18.16" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "6.19.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.15", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0f589ee54fd6d76d3f75e745f7f12c64cbd749e5" }, { "url": "https://git.kernel.org/stable/c/accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0" }, { "url": "https://git.kernel.org/stable/c/8320727be7ff704e07c87624efc2a4a75f54b3ce" }, { "url": "https://git.kernel.org/stable/c/1e300c33ef3cc544c2b9c693778fe9490cfe9184" }, { "url": "https://git.kernel.org/stable/c/1b1371cd4032ae859838ebc74215f569987bb197" }, { "url": "https://git.kernel.org/stable/c/1b1d3c5d58a80a19d017a409aa2308162bab5bbf" }, { "url": "https://git.kernel.org/stable/c/7e54ff938bebb173822b4c38b33fc164c1cabf92" }, { "url": "https://git.kernel.org/stable/c/ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2" } ], "title": "net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle", "x_generator": { "engine": "bippy-1.2.0" } } } }