CVE-2026-98750

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98750", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.368Z", "datePublished": "2026-10-18T15:47:35.167Z", "dateUpdated": "2026-10-30T12:39:20.512Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:39:20.512Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: fix saved termios reset race\n\nResetting saved termios state on device registration is needed where a\nminor number can be reused for an entirely different device and where\nthe old settings may prevent the port from even being opened (e.g. when\nCLOCAL is not set).\n\nNot all TTY drivers guarantee that the minor number is no longer in use\nwhen registering devices however, something which can lead to a\nuse-after-free when closing a TTY (and saving its termios) races with\nre-registration.\n\nAdd a new TTY_DRIVER_RESET_SAVED_TERMIOS flag to request that any saved\ntermios state is reset on registration and only set it for drivers that\nmake sure that the minor number is no longer in use."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/staging/greybus/uart.c", "drivers/tty/tty_io.c", "drivers/usb/class/cdc-acm.c", "drivers/usb/serial/usb-serial.c", "include/linux/tty_driver.h"], "versions": [{"version": "93857edd9829e144acb6c7e72d593f6e01aead66", "lessThan": "15ddaf908a8eee14e1872ff9c4cdb73562634e7e", "status": "affected", "versionType": "git"}, {"version": "93857edd9829e144acb6c7e72d593f6e01aead66", "lessThan": "bcb9b5df70d439f3c9d5a2d7f359dd7ab117bee0", "status": "affected", "versionType": "git"}, {"version": "93857edd9829e144acb6c7e72d593f6e01aead66", "lessThan": "33048616c4e22930e8769b8d14ee8a0dc5a80ceb", "status": "affected", "versionType": "git"}, {"version": "93857edd9829e144acb6c7e72d593f6e01aead66", "lessThan": "6b4e15cccfbe03b7c6ae60ff570c401bfb1e51d6", "status": "affected", "versionType": "git"}, {"version": "93857edd9829e144acb6c7e72d593f6e01aead66", "lessThan": "1572d86bcf0bcb848d20fc5e5de7ed6963034c2b", "status": "affected", "versionType": "git"}, {"version": "93857edd9829e144acb6c7e72d593f6e01aead66", "lessThan": "08bf919f041af9de372428bb0c938157ea144164", "status": "affected", "versionType": "git"}, {"version": "93857edd9829e144acb6c7e72d593f6e01aead66", "lessThan": "dcaf0251f847a45861e94c6617024a9455687d2f", "status": "affected", "versionType": "git"}, {"version": "93857edd9829e144acb6c7e72d593f6e01aead66", "lessThan": "8df07fe93573e9e548d6645273e9bcb6eb74059e", "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/staging/greybus/uart.c", "drivers/tty/tty_io.c", "drivers/usb/class/cdc-acm.c", "drivers/usb/serial/usb-serial.c", "include/linux/tty_driver.h"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.56", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.10", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "4.12", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.2.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/15ddaf908a8eee14e1872ff9c4cdb73562634e7e"}, {"url": "https://git.kernel.org/stable/c/bcb9b5df70d439f3c9d5a2d7f359dd7ab117bee0"}, {"url": "https://git.kernel.org/stable/c/33048616c4e22930e8769b8d14ee8a0dc5a80ceb"}, {"url": "https://git.kernel.org/stable/c/6b4e15cccfbe03b7c6ae60ff570c401bfb1e51d6"}, {"url": "https://git.kernel.org/stable/c/1572d86bcf0bcb848d20fc5e5de7ed6963034c2b"}, {"url": "https://git.kernel.org/stable/c/08bf919f041af9de372428bb0c938157ea144164"}, {"url": "https://git.kernel.org/stable/c/dcaf0251f847a45861e94c6617024a9455687d2f"}, {"url": "https://git.kernel.org/stable/c/8df07fe93573e9e548d6645273e9bcb6eb74059e"}], "title": "tty: fix saved termios reset race", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/staging/greybus/uart.c", "drivers/tty/tty_io.c", "drivers/usb/class/cdc-acm.c", "drivers/usb/serial/usb-serial.c", "include/linux/tty_driver.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "15ddaf908a8eee14e1872ff9c4cdb73562634e7e", "status": "affected", "version": "93857edd9829e144acb6c7e72d593f6e01aead66", "versionType": "git"}, {"lessThan": "bcb9b5df70d439f3c9d5a2d7f359dd7ab117bee0", "status": "affected", "version": "93857edd9829e144acb6c7e72d593f6e01aead66", "versionType": "git"}, {"lessThan": "33048616c4e22930e8769b8d14ee8a0dc5a80ceb", "status": "affected", "version": "93857edd9829e144acb6c7e72d593f6e01aead66", "versionType": "git"}, {"lessThan": "6b4e15cccfbe03b7c6ae60ff570c401bfb1e51d6", "status": "affected", "version": "93857edd9829e144acb6c7e72d593f6e01aead66", "versionType": "git"}, {"lessThan": "1572d86bcf0bcb848d20fc5e5de7ed6963034c2b", "status": "affected", "version": "93857edd9829e144acb6c7e72d593f6e01aead66", "versionType": "git"}, {"lessThan": "08bf919f041af9de372428bb0c938157ea144164", "status": "affected", "version": "93857edd9829e144acb6c7e72d593f6e01aead66", "versionType": "git"}, {"lessThan": "dcaf0251f847a45861e94c6617024a9455687d2f", "status": "affected", "version": "93857edd9829e144acb6c7e72d593f6e01aead66", "versionType": "git"}, {"lessThan": "8df07fe93573e9e548d6645273e9bcb6eb74059e", "status": "affected", "version": "93857edd9829e144acb6c7e72d593f6e01aead66", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/staging/greybus/uart.c", "drivers/tty/tty_io.c", "drivers/usb/class/cdc-acm.c", "drivers/usb/serial/usb-serial.c", "include/linux/tty_driver.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.12"}, {"lessThan": "4.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.56", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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: fix saved termios reset race\n\nResetting saved termios state on device registration is needed where a\nminor number can be reused for an entirely different device and where\nthe old settings may prevent the port from even being opened (e.g. when\nCLOCAL is not set).\n\nNot all TTY drivers guarantee that the minor number is no longer in use\nwhen registering devices however, something which can lead to a\nuse-after-free when closing a TTY (and saving its termios) races with\nre-registration.\n\nAdd a new TTY_DRIVER_RESET_SAVED_TERMIOS flag to request that any saved\ntermios state is reset on registration and only set it for drivers that\nmake sure that the minor number is no longer in use."}], "id": "CVE-2026-98750", "lastModified": "2026-10-30T13:21:23.787", "metrics": {}, "published": "2026-10-18T16:17:28.767", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/08bf919f041af9de372428bb0c938157ea144164"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1572d86bcf0bcb848d20fc5e5de7ed6963034c2b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/15ddaf908a8eee14e1872ff9c4cdb73562634e7e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/33048616c4e22930e8769b8d14ee8a0dc5a80ceb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6b4e15cccfbe03b7c6ae60ff570c401bfb1e51d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8df07fe93573e9e548d6645273e9bcb6eb74059e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bcb9b5df70d439f3c9d5a2d7f359dd7ab117bee0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dcaf0251f847a45861e94c6617024a9455687d2f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: kernel: use-after-free via race condition in TTY device registration", "id": "2555110", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2555110"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ntty: fix saved termios reset race\nResetting saved termios state on device registration is needed where a\nminor number can be reused for an entirely different device and where\nthe old settings may prevent the port from even being opened (e.g. when\nCLOCAL is not set).\nNot all TTY drivers guarantee that the minor number is no longer in use\nwhen registering devices however, something which can lead to a\nuse-after-free when closing a TTY (and saving its termios) races with\nre-registration.\nAdd a new TTY_DRIVER_RESET_SAVED_TERMIOS flag to request that any saved\ntermios state is reset on registration and only set it for drivers that\nmake sure that the minor number is no longer in use.", "A flaw was found in the Linux kernel's TTY (terminal) subsystem. A race condition occurs when closing a terminal device while the device number is simultaneously re-registered by a driver that does not guarantee minor number exclusivity. A local attacker could exploit this timing window to trigger a use-after-free memory condition, potentially causing a system crash (Denial of Service) or local privilege escalation."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-98750", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}], "public_date": "2026-10-18T15:47:35Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98750\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98750\nhttps://git.kernel.org/stable/c/08bf919f041af9de372428bb0c938157ea144164\nhttps://git.kernel.org/stable/c/1572d86bcf0bcb848d20fc5e5de7ed6963034c2b\nhttps://git.kernel.org/stable/c/8df07fe93573e9e548d6645273e9bcb6eb74059e\nhttps://git.kernel.org/stable/c/dcaf0251f847a45861e94c6617024a9455687d2f\nhttps://kernelcve.org/list/?q=CVE-2026-98750"], "statement": "A race between closing an existing TTY and registering another device with the same minor number can cause saved termios memory to be freed while the close path is still using or updating it. The resulting use after free can cause memory corruption or a kernel crash when device registration overlaps with termios preservation for the old TTY instance. For the CVSS the PR:L value is used because a local user must be able to access and close the affected TTY while device re-registration or minor reuse occurs. AC:H applies because successful triggering depends on a narrow timing window and on a driver that does not guarantee that the reused minor is no longer active. The issue is not directly network reachable. Impact is at least a local denial of service via kernel crash and in the worst case may allow confidentiality or integrity impact and local privilege escalation through reuse of freed kernel memory.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[93857edd9829e144acb6c7e72d593f6e01aead66,1572d86bcf0bcb848d20fc5e5de7ed6963034c2b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[93857edd9829e144acb6c7e72d593f6e01aead66,08bf919f041af9de372428bb0c938157ea144164)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[93857edd9829e144acb6c7e72d593f6e01aead66,dcaf0251f847a45861e94c6617024a9455687d2f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[93857edd9829e144acb6c7e72d593f6e01aead66,8df07fe93573e9e548d6645273e9bcb6eb74059e)"}}], "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": "generic", "value": "4.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.113,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.56,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.10,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3,*]"}}], "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": "2026-10-18T20:00:12.042760+00:00", "updated": "2026-10-22T20:45:05.387308+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416", "CWE-362"]}