{"id":"CVE-2026-43462","state":"PUBLISHED","title":"net: spacemit: Fix error handling in emac_tx_mem_map()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: spacemit: Fix error handling in emac_tx_mem_map()\n\nThe DMA mappings were leaked on mapping error. Free them with the\nexisting emac_free_tx_buf() function.","publishedAt":"2026-05-08T14:22:24.686Z","updatedAt":"2026-08-05T12:28:06.464Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bfec6d7f2001c7470c3cd261ae65a3ba8737f226","status":"affected","lessThan":"c34ebd7b24ea70be3c6fdb6936f79f593f37df60","versionType":"git"},{"version":"bfec6d7f2001c7470c3cd261ae65a3ba8737f226","status":"affected","lessThan":"edeaba385318f60ec1b32470da4d5eb800294d16","versionType":"git"},{"version":"bfec6d7f2001c7470c3cd261ae65a3ba8737f226","status":"affected","lessThan":"86292155bea578ebab0ca3b65d4d87ecd8a0e9ea","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/spacemit/k1_emac.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.19","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.9","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/spacemit/k1_emac.c"]}],"references":["https://git.kernel.org/stable/c/c34ebd7b24ea70be3c6fdb6936f79f593f37df60","https://git.kernel.org/stable/c/edeaba385318f60ec1b32470da4d5eb800294d16","https://git.kernel.org/stable/c/86292155bea578ebab0ca3b65d4d87ecd8a0e9ea"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43462.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43462","state":"PUBLISHED","datePublished":"2026-05-08T14:22:24.686Z","dateUpdated":"2026-08-05T12:28:06.464Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:56.010Z"},"containers":{"cna":{"title":"net: spacemit: Fix error handling in emac_tx_mem_map()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: spacemit: Fix error handling in emac_tx_mem_map()\n\nThe DMA mappings were leaked on mapping error. Free them with the\nexisting emac_free_tx_buf() function."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bfec6d7f2001c7470c3cd261ae65a3ba8737f226","status":"affected","lessThan":"c34ebd7b24ea70be3c6fdb6936f79f593f37df60","versionType":"git"},{"version":"bfec6d7f2001c7470c3cd261ae65a3ba8737f226","status":"affected","lessThan":"edeaba385318f60ec1b32470da4d5eb800294d16","versionType":"git"},{"version":"bfec6d7f2001c7470c3cd261ae65a3ba8737f226","status":"affected","lessThan":"86292155bea578ebab0ca3b65d4d87ecd8a0e9ea","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/spacemit/k1_emac.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.19","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.9","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/spacemit/k1_emac.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c34ebd7b24ea70be3c6fdb6936f79f593f37df60"},{"url":"https://git.kernel.org/stable/c/edeaba385318f60ec1b32470da4d5eb800294d16"},{"url":"https://git.kernel.org/stable/c/86292155bea578ebab0ca3b65d4d87ecd8a0e9ea"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:N - The vulnerable transmit path is reachable by network-driven egress traffic on a SpacemiT K1 system, such as routed packets or unauthenticated service responses that cause SKBs to be queued to this Ethernet device.\nAC:L - There is no race or precise timing requirement; an attacker can repeatedly drive fragmented TX traffic and resource pressure until a mid-packet DMA mapping failure exercises the buggy cleanup path.\nPR:N - In a network-facing or forwarding deployment, the attacker does not need local credentials or kernel capabilities to cause packets to be transmitted through the affected NIC.\nUI:N - No victim user action is required once the affected interface and service/forwarding path are active.\nS:U - The impact remains within the kernel/network device availability domain and does not cross a VM, IOMMU isolation, or sandbox security boundary.\nC:N - The confirmed bug is an orphaned DMA mapping/resource leak on TX mapping failure, with no demonstrated attacker-visible read primitive.\nI:N - The leaked DMA mappings are for TX buffers and the fix does not indicate an arbitrary write, data modification, or control-flow corruption primitive.\nA:H - Repeated leaks of DMA/IOMMU mapping resources can exhaust DMA resources and cause sustained transmit failure or complete network loss on the affected device."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:28:06.464Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.19"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.19.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}