{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-26998", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.206Z", "datePublished": "2024-05-01T05:28:25.905Z", "dateUpdated": "2026-05-23T15:41:02.315Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:41:02.315Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: core: Clearing the circular buffer before NULLifying it\n\nThe circular buffer is NULLified in uart_tty_port_shutdown()\nunder the spin lock. However, the PM or other timer based callbacks\nmay still trigger after this event without knowning that buffer pointer\nis not valid. Since the serial code is a bit inconsistent in checking\nthe buffer state (some rely on the head-tail positions, some on the\nbuffer pointer), it's better to have both aligned, i.e. buffer pointer\nto be NULL and head-tail possitions to be the same, meaning it's empty.\nThis will prevent asynchronous calls to dereference NULL pointer as\nreported recently in 8250 case:\n\n BUG: kernel NULL pointer dereference, address: 00000cf5\n Workqueue: pm pm_runtime_work\n EIP: serial8250_tx_chars (drivers/tty/serial/8250/8250_port.c:1809)\n ...\n ? serial8250_tx_chars (drivers/tty/serial/8250/8250_port.c:1809)\n __start_tx (drivers/tty/serial/8250/8250_port.c:1551)\n serial8250_start_tx (drivers/tty/serial/8250/8250_port.c:1654)\n serial_port_runtime_suspend (include/linux/serial_core.h:667 drivers/tty/serial/serial_port.c:63)\n __rpm_callback (drivers/base/power/runtime.c:393)\n ? serial_port_remove (drivers/tty/serial/serial_port.c:50)\n rpm_suspend (drivers/base/power/runtime.c:447)\n\nThe proposed change will prevent ->start_tx() to be called during\nsuspend on shut down port." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/tty/serial/serial_core.c" ], "versions": [ { "version": "434beb66368d4fb4d3119c2116b9398500adbf47", "lessThan": "7ae7104d54342433a3a73975f6569beefdd86350", "status": "affected", "versionType": "git" }, { "version": "43066e32227ecde674e8ae1fcdd4a1ede67680c2", "lessThan": "bb1118905e875c111d7ccef9aee86ac5e4e7f985", "status": "affected", "versionType": "git" }, { "version": "43066e32227ecde674e8ae1fcdd4a1ede67680c2", "lessThan": "9cf7ea2eeb745213dc2a04103e426b960e807940", "status": "affected", "versionType": "git" }, { "version": "a629a9b2f7699314a4abe8fbc37b0ee667b60f33", "status": "affected", "versionType": "git" }, { "version": "6.6.24", "lessThan": "6.6.29", "status": "affected", "versionType": "semver" }, { "version": "6.7.12", "lessThan": "6.8", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/tty/serial/serial_core.c" ], "versions": [ { "version": "6.8", "status": "affected" }, { "version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.29", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8.8", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9", "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": "6.6.24", "versionEndExcluding": "6.6.29" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.8.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/7ae7104d54342433a3a73975f6569beefdd86350" }, { "url": "https://git.kernel.org/stable/c/bb1118905e875c111d7ccef9aee86ac5e4e7f985" }, { "url": "https://git.kernel.org/stable/c/9cf7ea2eeb745213dc2a04103e426b960e807940" } ], "title": "serial: core: Clearing the circular buffer before NULLifying it", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-26998", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-05-09T18:39:13.227309Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-05T17:22:46.551Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/7ae7104d54342433a3a73975f6569beefdd86350", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/bb1118905e875c111d7ccef9aee86ac5e4e7f985", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/9cf7ea2eeb745213dc2a04103e426b960e807940", "tags": [ "x_transferred" ] }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DAMSOZXJEPUOXW33WZYWCVAY7Z5S7OOY/" }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4EZ6PJW7VOZ224TD7N4JZNU6KV32ZJ53/" }, { "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCBZZEC7L7KTWWAS2NLJK6SO3IZIL4WW/" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-04T17:16:05.094Z" } } ] } }