{"id":"CVE-2026-43283","state":"PUBLISHED","title":"net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle","description":"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.","publishedAt":"2026-05-06T11:29:03.726Z","updatedAt":"2026-08-05T12:27:03.376Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"0f589ee54fd6d76d3f75e745f7f12c64cbd749e5","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"8320727be7ff704e07c87624efc2a4a75f54b3ce","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"1e300c33ef3cc544c2b9c693778fe9490cfe9184","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"1b1371cd4032ae859838ebc74215f569987bb197","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"1b1d3c5d58a80a19d017a409aa2308162bab5bbf","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"7e54ff938bebb173822b4c38b33fc164c1cabf92","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/ec_bhf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.15","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/ec_bhf.c"]}],"references":["https://git.kernel.org/stable/c/0f589ee54fd6d76d3f75e745f7f12c64cbd749e5","https://git.kernel.org/stable/c/accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0","https://git.kernel.org/stable/c/8320727be7ff704e07c87624efc2a4a75f54b3ce","https://git.kernel.org/stable/c/1e300c33ef3cc544c2b9c693778fe9490cfe9184","https://git.kernel.org/stable/c/1b1371cd4032ae859838ebc74215f569987bb197","https://git.kernel.org/stable/c/1b1d3c5d58a80a19d017a409aa2308162bab5bbf","https://git.kernel.org/stable/c/7e54ff938bebb173822b4c38b33fc164c1cabf92","https://git.kernel.org/stable/c/ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43283.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43283","state":"PUBLISHED","datePublished":"2026-05-06T11:29:03.726Z","dateUpdated":"2026-08-05T12:27:03.376Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.998Z"},"containers":{"cna":{"title":"net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"0f589ee54fd6d76d3f75e745f7f12c64cbd749e5","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"accd0599bc8e73b962247c6c6c70ca7aa1f8e8d0","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"8320727be7ff704e07c87624efc2a4a75f54b3ce","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"1e300c33ef3cc544c2b9c693778fe9490cfe9184","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"1b1371cd4032ae859838ebc74215f569987bb197","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"1b1d3c5d58a80a19d017a409aa2308162bab5bbf","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"7e54ff938bebb173822b4c38b33fc164c1cabf92","versionType":"git"},{"version":"6af55ff52b02d492d45db88df3e461fa51a6f753","status":"affected","lessThan":"ffe68c3766997d82e9ccaf1cdbd47eba269c4aa2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/ec_bhf.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.15","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/ec_bhf.c"]}],"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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:27:03.376Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}