{"api_version":"1","generated_at":"2026-09-07T19:49:00+00:00","cve":"CVE-2026-80737","urls":{"html":"https://cve.report/CVE-2026-80737","api":"https://cve.report/api/cve/CVE-2026-80737.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80737","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80737"},"summary":{"title":"serial: amba-pl011: synchronize DMA teardown","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: amba-pl011: synchronize DMA teardown\n\ndmaengine_terminate_all() does not wait for a running callback, so the TX\ncallback can still touch the TX buffer after it is freed. The RX poll\ntimer reads the RX buffers without the port lock.\n\nSwitch to dmaengine_terminate_sync() and delete the RX timer before\nfreeing the buffers.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-03 13:06:12","updated_at":"2026-09-04 05:17:14"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/a38fae9d212e2d3ed5e9ec0ef773f8c0a27fb76e","name":"https://git.kernel.org/stable/c/a38fae9d212e2d3ed5e9ec0ef773f8c0a27fb76e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5974cb66681eac367107b05924744d7e3b49d41c","name":"https://git.kernel.org/stable/c/5974cb66681eac367107b05924744d7e3b49d41c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fdfb46c387241b4eddd36d746793764413285913","name":"https://git.kernel.org/stable/c/fdfb46c387241b4eddd36d746793764413285913","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/440915499231e9db1c361aa45bb702e8fd3b4a32","name":"https://git.kernel.org/stable/c/440915499231e9db1c361aa45bb702e8fd3b4a32","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9f6989e477f03a4721d34bb4b09b17accd40283e","name":"https://git.kernel.org/stable/c/9f6989e477f03a4721d34bb4b09b17accd40283e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c8c8e895f65fbf71ea6224e27cf8dab91b776e0d","name":"https://git.kernel.org/stable/c/c8c8e895f65fbf71ea6224e27cf8dab91b776e0d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/44bd0ecc3444882d08ecfbc2b2418d2f463d3186","name":"https://git.kernel.org/stable/c/44bd0ecc3444882d08ecfbc2b2418d2f463d3186","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f70c9d4fba46463a5b1c7b3ee9ee3b40c90dac03","name":"https://git.kernel.org/stable/c/f70c9d4fba46463a5b1c7b3ee9ee3b40c90dac03","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80737","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80737","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ead76f329f777c7301e0a5456a0a1c7a081570bd a38fae9d212e2d3ed5e9ec0ef773f8c0a27fb76e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ead76f329f777c7301e0a5456a0a1c7a081570bd 44bd0ecc3444882d08ecfbc2b2418d2f463d3186 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ead76f329f777c7301e0a5456a0a1c7a081570bd f70c9d4fba46463a5b1c7b3ee9ee3b40c90dac03 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ead76f329f777c7301e0a5456a0a1c7a081570bd c8c8e895f65fbf71ea6224e27cf8dab91b776e0d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80737","cve":"CVE-2026-80737","epss":"0.001640000","percentile":"0.058920000","score_date":"2026-09-06","updated_at":"2026-09-07 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the Linux kernel, the following vulnerability has been resolved:\n\nserial: amba-pl011: synchronize DMA teardown\n\ndmaengine_terminate_all() does not wait for a running callback, so the TX\ncallback can still touch the TX buffer after it is freed. The RX poll\ntimer reads the RX buffers without the port lock.\n\nSwitch to dmaengine_terminate_sync() and delete the RX timer before\nfreeing the buffers."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - Local tty device access via open/write/close on /dev/ttyAMA* or similar; PL011 DMA teardown runs in pl011_shutdown from uart_close/hangup/suspend, not via network protocols.\nAC:L - Attacker with tty fd controls DMA load (large writes for TX DMA, active RX) and teardown timing via close/hangup; they can repeatedly race shutdown against in-flight DMA callbacks/timers without uncontrollable conditions.\nPR:L - Requires open/write/close on the UART tty node, typically granted via dialout group on embedded ARM systems with PL011 DMA; not via user namespaces alone, but no root required on auxiliary serial ports.\nUI:N - Attacker performs all steps themselves (open port, queue DMA traffic, close); no separate victim action needed.\nS:U - Kernel heap/coherent-buffer UAF during UART driver teardown affects only local kernel resources; no VM escape, IOMMU bypass, or cross-security-authority boundary.\nC:H - TX DMA callback or RX poll timer can access freed TX kmalloc buffer or RX dma coherent pages, yielding UAF read primitives over kernel memory and potential information disclosure.\nI:H - Post-free access via pl011_dma_tx_refill/dma_map or pl011_dma_rx_poll writing into tty flip buffers enables heap corruption and potential kernel code execution or privilege escalation.\nA:H - UAF during DMA teardown can provoke kernel oops/panic from concurrent access to freed buffers, and repeated triggering can deny UART service or crash the host."}]}],"providerMetadata":{"dateUpdated":"2026-09-04T04:58:22.813Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a38fae9d212e2d3ed5e9ec0ef773f8c0a27fb76e"},{"url":"https://git.kernel.org/stable/c/44bd0ecc3444882d08ecfbc2b2418d2f463d3186"},{"url":"https://git.kernel.org/stable/c/f70c9d4fba46463a5b1c7b3ee9ee3b40c90dac03"},{"url":"https://git.kernel.org/stable/c/c8c8e895f65fbf71ea6224e27cf8dab91b776e0d"},{"url":"https://git.kernel.org/stable/c/9f6989e477f03a4721d34bb4b09b17accd40283e"},{"url":"https://git.kernel.org/stable/c/5974cb66681eac367107b05924744d7e3b49d41c"},{"url":"https://git.kernel.org/stable/c/fdfb46c387241b4eddd36d746793764413285913"},{"url":"https://git.kernel.org/stable/c/440915499231e9db1c361aa45bb702e8fd3b4a32"}],"title":"serial: amba-pl011: synchronize DMA teardown","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80737","datePublished":"2026-09-03T08:21:52.539Z","dateReserved":"2026-08-26T14:34:25.789Z","dateUpdated":"2026-09-04T04:58:22.813Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-03 13:06:12","lastModifiedDate":"2026-09-04 05:17:14","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80737","Ordinal":"1","Title":"serial: amba-pl011: synchronize DMA teardown","CVE":"CVE-2026-80737","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80737","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nserial: amba-pl011: synchronize DMA teardown\n\ndmaengine_terminate_all() does not wait for a running callback, so the TX\ncallback can still touch the TX buffer after it is freed. The RX poll\ntimer reads the RX buffers without the port lock.\n\nSwitch to dmaengine_terminate_sync() and delete the RX timer before\nfreeing the buffers.","Type":"Description","Title":"serial: amba-pl011: synchronize DMA teardown"}]}}}