CVE-2026-64528

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64528", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.794Z", "datePublished": "2026-07-25T09:20:51.774Z", "dateUpdated": "2026-07-25T09:20:51.774Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T09:20:51.774Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: samsung: Remove redundant port lock acquisition in rx helpers\n\nSashiko identified a deadlock when the console flow is engaged [1].\n\nWhen console flow control is enabled (UPF_CONS_FLOW),\ns3c24xx_serial_stop_tx() calls s3c24xx_serial_rx_enable() and\ns3c24xx_serial_start_tx() calls s3c24xx_serial_rx_disable().\n\nThe serial core framework invokes the .stop_tx() and .start_tx()\ncallbacks with the port->lock spinlock already held. Furthermore, all\ninternal driver paths that invoke stop_tx (such as the DMA TX\ncompletion handler s3c24xx_serial_tx_dma_complete() or the PIO TX IRQ\nhandler s3c24xx_serial_tx_irq()) also acquire port->lock prior to\ncalling it. (Note that s3c24xx_serial_start_tx() is only invoked by the\nserial core).\n\nHowever, s3c24xx_serial_rx_enable() and s3c24xx_serial_rx_disable()\nunconditionally attempt to acquire port->lock again using\nuart_port_lock_irqsave(). Since spinlocks are not recursive, this\ncauses a deadlock on the same CPU when console flow control is engaged.\n\nRemove the redundant lock acquisition from both rx helper functions."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tty/serial/samsung_tty.c"], "versions": [{"version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "lessThan": "ee9eb72be95490602c493db050c73d925c3a4d74", "status": "affected", "versionType": "git"}, {"version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "lessThan": "10014eb7eee351f7b587f8ac85830f0c9343cb9a", "status": "affected", "versionType": "git"}, {"version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "lessThan": "f4c3e63fa8639aedf96fb200d9939945a9eed51e", "status": "affected", "versionType": "git"}, {"version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "lessThan": "a9c22e0f93ba18322a6623ecdda2f0cd858ca350", "status": "affected", "versionType": "git"}, {"version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "lessThan": "14143ec10d69f42806b5d7b046f0fd1b835831ae", "status": "affected", "versionType": "git"}, {"version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "lessThan": "9fd48937046efc9abb89379d63ee9cc5c661d711", "status": "affected", "versionType": "git"}, {"version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "lessThan": "9c92b42207978559e32903c3098aaf5c5b5788b2", "status": "affected", "versionType": "git"}, {"version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "lessThan": "a3bb136bff5e6a5e48cdd813246c9c4686feaaa9", "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/samsung_tty.c"], "versions": [{"version": "2.6.27", "status": "affected"}, {"version": "0", "lessThan": "2.6.27", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "2.6.27", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ee9eb72be95490602c493db050c73d925c3a4d74"}, {"url": "https://git.kernel.org/stable/c/10014eb7eee351f7b587f8ac85830f0c9343cb9a"}, {"url": "https://git.kernel.org/stable/c/f4c3e63fa8639aedf96fb200d9939945a9eed51e"}, {"url": "https://git.kernel.org/stable/c/a9c22e0f93ba18322a6623ecdda2f0cd858ca350"}, {"url": "https://git.kernel.org/stable/c/14143ec10d69f42806b5d7b046f0fd1b835831ae"}, {"url": "https://git.kernel.org/stable/c/9fd48937046efc9abb89379d63ee9cc5c661d711"}, {"url": "https://git.kernel.org/stable/c/9c92b42207978559e32903c3098aaf5c5b5788b2"}, {"url": "https://git.kernel.org/stable/c/a3bb136bff5e6a5e48cdd813246c9c4686feaaa9"}], "title": "tty: serial: samsung: Remove redundant port lock acquisition in rx helpers", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/tty/serial/samsung_tty.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ee9eb72be95490602c493db050c73d925c3a4d74", "status": "affected", "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "versionType": "git"}, {"lessThan": "10014eb7eee351f7b587f8ac85830f0c9343cb9a", "status": "affected", "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "versionType": "git"}, {"lessThan": "f4c3e63fa8639aedf96fb200d9939945a9eed51e", "status": "affected", "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "versionType": "git"}, {"lessThan": "a9c22e0f93ba18322a6623ecdda2f0cd858ca350", "status": "affected", "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "versionType": "git"}, {"lessThan": "14143ec10d69f42806b5d7b046f0fd1b835831ae", "status": "affected", "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "versionType": "git"}, {"lessThan": "9fd48937046efc9abb89379d63ee9cc5c661d711", "status": "affected", "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "versionType": "git"}, {"lessThan": "9c92b42207978559e32903c3098aaf5c5b5788b2", "status": "affected", "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "versionType": "git"}, {"lessThan": "a3bb136bff5e6a5e48cdd813246c9c4686feaaa9", "status": "affected", "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/tty/serial/samsung_tty.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.27"}, {"lessThan": "2.6.27", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.259", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.210", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.176", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.143", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.93", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.35", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.12", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: samsung: Remove redundant port lock acquisition in rx helpers\n\nSashiko identified a deadlock when the console flow is engaged [1].\n\nWhen console flow control is enabled (UPF_CONS_FLOW),\ns3c24xx_serial_stop_tx() calls s3c24xx_serial_rx_enable() and\ns3c24xx_serial_start_tx() calls s3c24xx_serial_rx_disable().\n\nThe serial core framework invokes the .stop_tx() and .start_tx()\ncallbacks with the port->lock spinlock already held. Furthermore, all\ninternal driver paths that invoke stop_tx (such as the DMA TX\ncompletion handler s3c24xx_serial_tx_dma_complete() or the PIO TX IRQ\nhandler s3c24xx_serial_tx_irq()) also acquire port->lock prior to\ncalling it. (Note that s3c24xx_serial_start_tx() is only invoked by the\nserial core).\n\nHowever, s3c24xx_serial_rx_enable() and s3c24xx_serial_rx_disable()\nunconditionally attempt to acquire port->lock again using\nuart_port_lock_irqsave(). Since spinlocks are not recursive, this\ncauses a deadlock on the same CPU when console flow control is engaged.\n\nRemove the redundant lock acquisition from both rx helper functions."}], "id": "CVE-2026-64528", "lastModified": "2026-11-03T18:15:39.353", "metrics": {}, "published": "2026-07-25T10:17:39.187", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/10014eb7eee351f7b587f8ac85830f0c9343cb9a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/14143ec10d69f42806b5d7b046f0fd1b835831ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9c92b42207978559e32903c3098aaf5c5b5788b2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9fd48937046efc9abb89379d63ee9cc5c661d711"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a3bb136bff5e6a5e48cdd813246c9c4686feaaa9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a9c22e0f93ba18322a6623ecdda2f0cd858ca350"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ee9eb72be95490602c493db050c73d925c3a4d74"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f4c3e63fa8639aedf96fb200d9939945a9eed51e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: tty: serial: samsung: Remove redundant port lock acquisition in rx helpers", "id": "2507080", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507080"}, "csaw": false, "cwe": "CWE-833", "details": ["A flaw was found in the Linux kernel's Samsung serial driver. When console flow control is enabled, a redundant attempt to acquire a port lock occurs within the receive helper functions. This can lead to a deadlock on the same CPU, causing the system to become unresponsive."], "name": "CVE-2026-64528", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64528\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64528\nhttps://lore.kernel.org/linux-cve-announce/2026072534-CVE-2026-64528-0157@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b497549a035c2a81b71c7a27f2b00c8a16c09423,ee9eb72be95490602c493db050c73d925c3a4d74)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b497549a035c2a81b71c7a27f2b00c8a16c09423,10014eb7eee351f7b587f8ac85830f0c9343cb9a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b497549a035c2a81b71c7a27f2b00c8a16c09423,f4c3e63fa8639aedf96fb200d9939945a9eed51e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b497549a035c2a81b71c7a27f2b00c8a16c09423,a9c22e0f93ba18322a6623ecdda2f0cd858ca350)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b497549a035c2a81b71c7a27f2b00c8a16c09423,14143ec10d69f42806b5d7b046f0fd1b835831ae)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b497549a035c2a81b71c7a27f2b00c8a16c09423,9fd48937046efc9abb89379d63ee9cc5c661d711)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b497549a035c2a81b71c7a27f2b0c8a16c09423,9c92b42207978559e32903c3098aaf5c5b5788b2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b497549a035c2a81b71c7a27f2b00c8a16c09423,a3bb136bff5e6a5e48cdd813246c9c4686feaaa9)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.27"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,2.6.27)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.259,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.210,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.176,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.143,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.93,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.35,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.12,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-26T02:15:03.313359+00:00", "updated": "2026-08-02T12:15:18.581267+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}