CVE-2026-93050

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93050", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T15:57:05.658Z", "datePublished": "2026-09-17T16:10:40.360Z", "dateUpdated": "2026-10-19T09:04:45.286Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:04:45.286Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipack: ipoctal: fix UAF, null-ptr-deref, and use-after-free in cleanup on remove\n\nThree issues arise when the device is removed while a tty session is\nstill active:\n\n1. UAF of struct ipoctal: the remove callback frees ipoctal via\n kfree() while tty ops may still access it. Fix by introducing\n kref-based lifetime management \u2014 kref is taken in install() when\n a tty is opened and released in cleanup() when the tty is finally\n destroyed; remove() uses kref_put() instead of kfree().\n\n2. NULL dereference in ipoctal_write_tty(): __ipoctal_remove()\n frees xmit_buf via tty_port_free_xmit_buf() while a userspace\n process may still hold the tty fd and call write(). Fix by\n checking for NULL xmit_buf in ipoctal_write_tty().\n\n3. UAF in ipoctal_cleanup(): ipack_put_carrier(ipoctal->dev)\n dereferences ipoctal->dev after the ipack_device has been freed\n by ipack_device_del(). Fix by caching ipoctal->carrier_owner\n during probe() and calling module_put() on the cached pointer\n directly in cleanup(), avoiding any access to ipoctal->dev.\n\nAlso introduce a \"removed\" flag in struct ipoctal, set at the start\nof __ipoctal_remove(), and checked in every tty op that accesses\nhardware resources (port_activate, write_tty, set_termios, hangup,\nshutdown). This prevents page faults when devm_ioremap() regions\nare unmapped after remove() returns."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/ipack/devices/ipoctal.c"], "versions": [{"version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "lessThan": "ab5f5b27a340004b92252c6a5f23bf1c6cf3b02a", "status": "affected", "versionType": "git"}, {"version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "lessThan": "c92ef8fd834521f0b788e0511976c689fe57c63c", "status": "affected", "versionType": "git"}, {"version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "lessThan": "a4613140f01bd0fb9980e2746ed9aaa65a29b5d6", "status": "affected", "versionType": "git"}, {"version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "lessThan": "1a3258e105f711538201bdd2ac2a05b11554eabc", "status": "affected", "versionType": "git"}, {"version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "lessThan": "4a6518be316029650301f2a5e8f0def229b895d9", "status": "affected", "versionType": "git"}, {"version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "lessThan": "b6b5d64cb161a28347d64dc3168a636c4abb68d5", "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/ipack/devices/ipoctal.c"], "versions": [{"version": "3.8", "status": "affected"}, {"version": "0", "lessThan": "3.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "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": "3.8", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ab5f5b27a340004b92252c6a5f23bf1c6cf3b02a"}, {"url": "https://git.kernel.org/stable/c/c92ef8fd834521f0b788e0511976c689fe57c63c"}, {"url": "https://git.kernel.org/stable/c/a4613140f01bd0fb9980e2746ed9aaa65a29b5d6"}, {"url": "https://git.kernel.org/stable/c/1a3258e105f711538201bdd2ac2a05b11554eabc"}, {"url": "https://git.kernel.org/stable/c/4a6518be316029650301f2a5e8f0def229b895d9"}, {"url": "https://git.kernel.org/stable/c/b6b5d64cb161a28347d64dc3168a636c4abb68d5"}], "title": "ipack: ipoctal: fix UAF, null-ptr-deref, and use-after-free in cleanup on remove", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/ipack/devices/ipoctal.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ab5f5b27a340004b92252c6a5f23bf1c6cf3b02a", "status": "affected", "version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "versionType": "git"}, {"lessThan": "c92ef8fd834521f0b788e0511976c689fe57c63c", "status": "affected", "version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "versionType": "git"}, {"lessThan": "a4613140f01bd0fb9980e2746ed9aaa65a29b5d6", "status": "affected", "version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "versionType": "git"}, {"lessThan": "1a3258e105f711538201bdd2ac2a05b11554eabc", "status": "affected", "version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "versionType": "git"}, {"lessThan": "4a6518be316029650301f2a5e8f0def229b895d9", "status": "affected", "version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "versionType": "git"}, {"lessThan": "b6b5d64cb161a28347d64dc3168a636c4abb68d5", "status": "affected", "version": "05e5027efc9c0bb6d1d04cde279afbafca0a7929", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/ipack/devices/ipoctal.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.8"}, {"lessThan": "3.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "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\nipack: ipoctal: fix UAF, null-ptr-deref, and use-after-free in cleanup on remove\n\nThree issues arise when the device is removed while a tty session is\nstill active:\n\n1. UAF of struct ipoctal: the remove callback frees ipoctal via\n kfree() while tty ops may still access it. Fix by introducing\n kref-based lifetime management \u2014 kref is taken in install() when\n a tty is opened and released in cleanup() when the tty is finally\n destroyed; remove() uses kref_put() instead of kfree().\n\n2. NULL dereference in ipoctal_write_tty(): __ipoctal_remove()\n frees xmit_buf via tty_port_free_xmit_buf() while a userspace\n process may still hold the tty fd and call write(). Fix by\n checking for NULL xmit_buf in ipoctal_write_tty().\n\n3. UAF in ipoctal_cleanup(): ipack_put_carrier(ipoctal->dev)\n dereferences ipoctal->dev after the ipack_device has been freed\n by ipack_device_del(). Fix by caching ipoctal->carrier_owner\n during probe() and calling module_put() on the cached pointer\n directly in cleanup(), avoiding any access to ipoctal->dev.\n\nAlso introduce a \"removed\" flag in struct ipoctal, set at the start\nof __ipoctal_remove(), and checked in every tty op that accesses\nhardware resources (port_activate, write_tty, set_termios, hangup,\nshutdown). This prevents page faults when devm_ioremap() regions\nare unmapped after remove() returns."}], "id": "CVE-2026-93050", "lastModified": "2026-10-19T10:16:54.790", "metrics": {}, "published": "2026-09-17T17:17:58.367", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1a3258e105f711538201bdd2ac2a05b11554eabc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4a6518be316029650301f2a5e8f0def229b895d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a4613140f01bd0fb9980e2746ed9aaa65a29b5d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ab5f5b27a340004b92252c6a5f23bf1c6cf3b02a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b6b5d64cb161a28347d64dc3168a636c4abb68d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c92ef8fd834521f0b788e0511976c689fe57c63c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[05e5027efc9c0bb6d1d04cde279afbafca0a7929,ab5f5b27a340004b92252c6a5f23bf1c6cf3b02a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[05e5027efc9c0bb6d1d04cde279afbafca0a7929,c92ef8fd834521f0b788e0511976c689fe57c63c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[05e5027efc9c0bb6d1d04cde279afbafca0a7929,a4613140f01bd0fb9980e2746ed9aaa65a29b5d6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[05e5027efc9c0bb6d1d04cde279afbafca0a7929,1a3258e105f711538201bdd2ac2a05b11554eabc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[05e5027efc9c0bb6d1d04cde279afbafca0a7929,4a6518be316029650301f2a5e8f0def229b895d9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[05e5027efc9c0bb6d1d04cde279afbafca0a7929,b6b5d64cb161a28347d64dc3168a636c4abb68d5)"}}], "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": "3.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,3.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "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": "2026-09-19T07:00:11.405140+00:00", "updated": "2026-09-19T14:15:17.202067+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416", "CWE-476"]}