{"id":"CVE-2026-43149","state":"PUBLISHED","title":"net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean()\n\nThe priv->rx_buffer and priv->tx_buffer are alloc'd together as\ncontiguous buffers in uhdlc_init() but freed as two buffers in\nuhdlc_memclean().\n\nChange the cleanup to only call dma_free_coherent() once on the whole\nbuffer.","publishedAt":"2026-05-06T11:27:31.708Z","updatedAt":"2026-05-11T22:18:42.659Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"6496fb830cbb741d831225cc4e7e5601c6e42970","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"ba8d8429e5d6c36f9a654d2b96b9e043c43d92b4","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"011ae5dd84dc9f05eb9b8e1adff44252ac776e7b","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"0f85a9655445e67bb0238cfc983d7c383b54938e","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"84b932bc9899d43e5829e6cf088b72d73a922b2b","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"d8a522085d09b30aba1016daf1dddac37c0f0285","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"d68994e37ac3b285692559776e0279a88a3b5f8d","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"36bd7d5deef936c4e1e3cd341598140e5c14c1d3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wan/fsl_ucc_hdlc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.8","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/wan/fsl_ucc_hdlc.c"]}],"references":["https://git.kernel.org/stable/c/6496fb830cbb741d831225cc4e7e5601c6e42970","https://git.kernel.org/stable/c/ba8d8429e5d6c36f9a654d2b96b9e043c43d92b4","https://git.kernel.org/stable/c/011ae5dd84dc9f05eb9b8e1adff44252ac776e7b","https://git.kernel.org/stable/c/0f85a9655445e67bb0238cfc983d7c383b54938e","https://git.kernel.org/stable/c/84b932bc9899d43e5829e6cf088b72d73a922b2b","https://git.kernel.org/stable/c/d8a522085d09b30aba1016daf1dddac37c0f0285","https://git.kernel.org/stable/c/d68994e37ac3b285692559776e0279a88a3b5f8d","https://git.kernel.org/stable/c/36bd7d5deef936c4e1e3cd341598140e5c14c1d3"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43149.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43149","state":"PUBLISHED","datePublished":"2026-05-06T11:27:31.708Z","dateUpdated":"2026-05-11T22:18:42.659Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.989Z"},"containers":{"cna":{"title":"net: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wan/fsl_ucc_hdlc: Fix dma_free_coherent() in uhdlc_memclean()\n\nThe priv->rx_buffer and priv->tx_buffer are alloc'd together as\ncontiguous buffers in uhdlc_init() but freed as two buffers in\nuhdlc_memclean().\n\nChange the cleanup to only call dma_free_coherent() once on the whole\nbuffer."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"6496fb830cbb741d831225cc4e7e5601c6e42970","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"ba8d8429e5d6c36f9a654d2b96b9e043c43d92b4","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"011ae5dd84dc9f05eb9b8e1adff44252ac776e7b","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"0f85a9655445e67bb0238cfc983d7c383b54938e","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"84b932bc9899d43e5829e6cf088b72d73a922b2b","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"d8a522085d09b30aba1016daf1dddac37c0f0285","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"d68994e37ac3b285692559776e0279a88a3b5f8d","versionType":"git"},{"version":"c19b6d246a35627c3a69b2fa6bdece212b48214b","status":"affected","lessThan":"36bd7d5deef936c4e1e3cd341598140e5c14c1d3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wan/fsl_ucc_hdlc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.8","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/wan/fsl_ucc_hdlc.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6496fb830cbb741d831225cc4e7e5601c6e42970"},{"url":"https://git.kernel.org/stable/c/ba8d8429e5d6c36f9a654d2b96b9e043c43d92b4"},{"url":"https://git.kernel.org/stable/c/011ae5dd84dc9f05eb9b8e1adff44252ac776e7b"},{"url":"https://git.kernel.org/stable/c/0f85a9655445e67bb0238cfc983d7c383b54938e"},{"url":"https://git.kernel.org/stable/c/84b932bc9899d43e5829e6cf088b72d73a922b2b"},{"url":"https://git.kernel.org/stable/c/d8a522085d09b30aba1016daf1dddac37c0f0285"},{"url":"https://git.kernel.org/stable/c/d68994e37ac3b285692559776e0279a88a3b5f8d"},{"url":"https://git.kernel.org/stable/c/36bd7d5deef936c4e1e3cd341598140e5c14c1d3"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:18:42.659Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"5.10.252"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"5.15.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.18.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}