{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80737", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.789Z", "datePublished": "2026-09-03T08:21:52.539Z", "dateUpdated": "2026-09-04T04:58:22.813Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-04T04:58:22.813Z" }, "descriptions": [ { "lang": "en", "value": "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." } ], "metrics": [ { "cvssV3_1": { "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" }, "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." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/tty/serial/amba-pl011.c" ], "versions": [ { "version": "ead76f329f777c7301e0a5456a0a1c7a081570bd", "lessThan": "a38fae9d212e2d3ed5e9ec0ef773f8c0a27fb76e", "status": "affected", "versionType": "git" }, { "version": "ead76f329f777c7301e0a5456a0a1c7a081570bd", "lessThan": "44bd0ecc3444882d08ecfbc2b2418d2f463d3186", "status": "affected", "versionType": "git" }, { "version": "ead76f329f777c7301e0a5456a0a1c7a081570bd", "lessThan": "f70c9d4fba46463a5b1c7b3ee9ee3b40c90dac03", "status": "affected", "versionType": "git" }, { "version": "ead76f329f777c7301e0a5456a0a1c7a081570bd", "lessThan": "c8c8e895f65fbf71ea6224e27cf8dab91b776e0d", "status": "affected", "versionType": "git" }, { "version": "ead76f329f777c7301e0a5456a0a1c7a081570bd", "lessThan": "9f6989e477f03a4721d34bb4b09b17accd40283e", "status": "affected", "versionType": "git" }, { "version": "ead76f329f777c7301e0a5456a0a1c7a081570bd", "lessThan": "5974cb66681eac367107b05924744d7e3b49d41c", "status": "affected", "versionType": "git" }, { "version": "ead76f329f777c7301e0a5456a0a1c7a081570bd", "lessThan": "fdfb46c387241b4eddd36d746793764413285913", "status": "affected", "versionType": "git" }, { "version": "ead76f329f777c7301e0a5456a0a1c7a081570bd", "lessThan": "440915499231e9db1c361aa45bb702e8fd3b4a32", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/tty/serial/amba-pl011.c" ], "versions": [ { "version": "2.6.39", "status": "affected" }, { "version": "0", "lessThan": "2.6.39", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.267", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.218", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.185", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.154", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.106", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.9", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "5.10.267" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "5.15.218" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.1.185" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.6.154" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.12.106" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "6.18.45" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "7.1.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.39", "versionEndExcluding": "7.2" } ] } ] } ], "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" } } } }