{"id":"CVE-2026-64234","state":"PUBLISHED","title":"tty: serial: pch_uart: add check for dma_alloc_coherent()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: pch_uart: add check for dma_alloc_coherent()\n\nAdd a check for dma_alloc_coherent() failure to prevent a potential\nNULL pointer dereference in dma_handle_rx(). Properly release DMA\nchannels and the PCI device reference using a goto ladder if the\nallocation fails.","publishedAt":"2026-07-24T15:27:40.263Z","updatedAt":"2026-07-24T15:27:40.263Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"760df81763b391bb5f0dcb0b7597b736da753ae4","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"daea997bb244aeb50cbb2e5e075fb446a6cf068f","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"6dd5c0ea139b586ad5a091677056dafd405cfe82","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"d846df2dfbc2469a688833b4cc4f8aa80672bde8","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"66f8bfea055b23719b4fd6ce207c44de37d82a59","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"d8d53a343ebe74274ca17b1e1993042e99f8c863","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"6fe472c1bbbe238e91141f7cabc1226e96a60d43","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/serial/pch_uart.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.38","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.38","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.93","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.35","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.12","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/serial/pch_uart.c"]}],"references":["https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4","https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf","https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f","https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82","https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8","https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59","https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863","https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64234.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64234","state":"PUBLISHED","datePublished":"2026-07-24T15:27:40.263Z","dateUpdated":"2026-07-24T15:27:40.263Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.771Z"},"containers":{"cna":{"title":"tty: serial: pch_uart: add check for dma_alloc_coherent()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: pch_uart: add check for dma_alloc_coherent()\n\nAdd a check for dma_alloc_coherent() failure to prevent a potential\nNULL pointer dereference in dma_handle_rx(). Properly release DMA\nchannels and the PCI device reference using a goto ladder if the\nallocation fails."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"760df81763b391bb5f0dcb0b7597b736da753ae4","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"daea997bb244aeb50cbb2e5e075fb446a6cf068f","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"6dd5c0ea139b586ad5a091677056dafd405cfe82","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"d846df2dfbc2469a688833b4cc4f8aa80672bde8","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"66f8bfea055b23719b4fd6ce207c44de37d82a59","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"d8d53a343ebe74274ca17b1e1993042e99f8c863","versionType":"git"},{"version":"3c6a483275f47a2ef7119309ad3d791c10cf30da","status":"affected","lessThan":"6fe472c1bbbe238e91141f7cabc1226e96a60d43","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/serial/pch_uart.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.38","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.38","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.143","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.93","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.35","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.12","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/serial/pch_uart.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/760df81763b391bb5f0dcb0b7597b736da753ae4"},{"url":"https://git.kernel.org/stable/c/5f2e2a240dc1846e049bc67e9c3cdf5b031d08bf"},{"url":"https://git.kernel.org/stable/c/daea997bb244aeb50cbb2e5e075fb446a6cf068f"},{"url":"https://git.kernel.org/stable/c/6dd5c0ea139b586ad5a091677056dafd405cfe82"},{"url":"https://git.kernel.org/stable/c/d846df2dfbc2469a688833b4cc4f8aa80672bde8"},{"url":"https://git.kernel.org/stable/c/66f8bfea055b23719b4fd6ce207c44de37d82a59"},{"url":"https://git.kernel.org/stable/c/d8d53a343ebe74274ca17b1e1993042e99f8c863"},{"url":"https://git.kernel.org/stable/c/6fe472c1bbbe238e91141f7cabc1226e96a60d43"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-07-24T15:27:40.263Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.12.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"6.18.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"7.0.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.38","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}