{"id":"CVE-2025-38262","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: uartlite: register uart driver in init\n\nWhen two instances of uart devices are probing, a concurrency race can\noccur","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: uartlite: register uart driver in init\n\nWhen two instances of uart devices are probing, a concurrency race can\noccur. If one thread calls uart_register_dri…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-476","CWE-824"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 2.6.20, < 5.4.296","linux_kernel >= 5.5, < 5.15.187","linux_kernel >= 5.16, < 6.1.143","linux_kernel >= 6.2, < 6.6.96","linux_kernel >= 6.7, < 6.12.36","linux_kernel >= 6.13, < 6.15.5","debian_linux = 11.0"],"patched":["linux_kernel 6.15.5"],"published":"2025-07-09","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:18:37.363","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-38262","references":[{"url":"https://git.kernel.org/stable/c/5015eed450005bab6e5cb6810f7a62eab0434fc4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/685d29f2c5057b32c7b1b46f2a7d303b926c8f72","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6bd697b5fc39fd24e2aa418c7b7d14469f550a93","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6db06aaea07bb7c8e33a425cf7b98bf29ee6056e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8e958d10dd0ce5ae674cce460db5c9ca3f25243b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9c905fdbba68a6d73d39a6b7de9b9f0d6c46df87","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f5e4229d94792b40e750f30c92bcf7a3107c72ef","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38262.json"},{"url":"https://access.redhat.com/security/cve/CVE-2025-38262"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2378987"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-38262"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38262"},{"url":"https://lore.kernel.org/linux-cve-announce/2025070936-CVE-2025-38262-419f@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00187,"epssPercentile":0.08199,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:49:09.978264Z"},"scores":{"nvd":7.8,"vendor":4.1,"cna":7.8},"ingestedAt":"2026-10-15T22:48:25.501Z","slug":"CVE-2025-38262","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: uartlite: register uart driver in init\n\nWhen two instances of uart devices are probing, a concurrency race can\noccur. If one thread calls uart_register_driver function, which first\nallocates and assigns memory to 'uart_state' member of uart_driver\nstructure, the other instance can bypass uart driver registration and\ncall ulite_assign. This calls uart_add_one_port, which expects the uart\ndriver to be fully initialized. This leads to a kernel panic due to a\nnull pointer dereference:\n\n[    8.143581] BUG: kernel NULL pointer dereference, address: 00000000000002b8\n[    8.156982] #PF: supervisor write access in kernel mode\n[    8.156984] #PF: error_code(0x0002) - not-present page\n[    8.156986] PGD 0 P4D 0\n...\n[    8.180668] RIP: 0010:mutex_lock+0x19/0x30\n[    8.188624] Call Trace:\n[    8.188629]  ? __die_body.cold+0x1a/0x1f\n[    8.195260]  ? page_fault_oops+0x15c/0x290\n[    8.209183]  ? __irq_resolve_mapping+0x47/0x80\n[    8.209187]  ? exc_page_fault+0x64/0x140\n[    8.209190]  ? asm_exc_page_fault+0x22/0x30\n[    8.209196]  ? mutex_lock+0x19/0x30\n[    8.223116]  uart_add_one_port+0x60/0x440\n[    8.223122]  ? proc_tty_register_driver+0x43/0x50\n[    8.223126]  ? tty_register_driver+0x1ca/0x1e0\n[    8.246250]  ulite_probe+0x357/0x4b0 [uartlite]\n\nTo prevent it, move uart driver registration in to init function. This\nwill ensure that uart_driver is always registered when probe function\nis called.\n\n## Affected\n\n- `linux_kernel >= 2.6.20, < 5.4.296`\n- `linux_kernel >= 5.5, < 5.15.187`\n- `linux_kernel >= 5.16, < 6.1.143`\n- `linux_kernel >= 6.2, < 6.6.96`\n- `linux_kernel >= 6.7, < 6.12.36`\n- `linux_kernel >= 6.13, < 6.15.5`\n- `debian_linux = 11.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.15.5`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38262.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":230047,"id":"CVE-2025-38262","ts":1793124776066,"field":"cvss","old":"4.1","new":"7.8"},{"seq":230046,"id":"CVE-2025-38262","ts":1793124776066,"field":"severity","old":"medium","new":"high"},{"seq":223676,"id":"CVE-2025-38262","ts":1792238363956,"field":"cvss","old":"7.8","new":"4.1"},{"seq":223675,"id":"CVE-2025-38262","ts":1792238363956,"field":"severity","old":"high","new":"medium"}]}