CVE-2025-38262tty: serial: uartlite: register uart driver in init
- 7.8HighCVSS base score
- 0.19%Exploitation in 30 daysEPSS · top 91% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: tty: serial: uartlite: register uart driver in init When two instances of uart devices are probing, a concurrency race can occur. If one thread calls uart_register_driver function, which first allocates and assigns memory to 'uart_state' member of uart_driver structure, the other instance can bypass uart driver registration and call ulite_assign. This calls uart_add_one_port, which expects the uart driver to be fully initialized. This leads to a kernel panic due to a null pointer dereference: [ 8.143581] BUG: kernel NULL pointer dereference, address: 00000000000002b8 [ 8.156982] #PF: supervisor write access in kernel mode [ 8.156984] #PF: error_code(0x0002) - not-present page [ 8.156986] PGD 0 P4D 0 ... [ 8.180668] RIP: 0010:mutex_lock+0x19/0x30 [ 8.188624] Call Trace: [ 8.188629] ? __die_body.cold+0x1a/0x1f [ 8.195260] ? page_fault_oops+0x15c/0x290 [ 8.209183] ? __irq_resolve_mapping+0x47/0x80 [ 8.209187] ? exc_page_fault+0x64/0x140 [ 8.209190] ? asm_exc_page_fault+0x22/0x30 [ 8.209196] ? mutex_lock+0x19/0x30 [ 8.223116] uart_add_one_port+0x60/0x440 [ 8.223122] ? proc_tty_register_driver+0x43/0x50 [ 8.223126] ? tty_register_driver+0x1ca/0x1e0 [ 8.246250] ulite_probe+0x357/0x4b0 [uartlite] To prevent it, move uart driver registration in to init function. This will ensure that uart_driver is always registered when probe function is called.
Timeline
ID reserved
By Linux
- 3 months later
· 3 months later
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 238b8721a554a33a451a3f13bdb5be8fe5cfc927 – < 5015eed450005bab6e5cb6810f7a62eab0434fc4
- affected 238b8721a554a33a451a3f13bdb5be8fe5cfc927 – < 9c905fdbba68a6d73d39a6b7de9b9f0d6c46df87
- affected 238b8721a554a33a451a3f13bdb5be8fe5cfc927 – < 6db06aaea07bb7c8e33a425cf7b98bf29ee6056e
- affected 238b8721a554a33a451a3f13bdb5be8fe5cfc927 – < 8e958d10dd0ce5ae674cce460db5c9ca3f25243b
- affected 238b8721a554a33a451a3f13bdb5be8fe5cfc927 – < 685d29f2c5057b32c7b1b46f2a7d303b926c8f72
- affected 238b8721a554a33a451a3f13bdb5be8fe5cfc927 – < f5e4229d94792b40e750f30c92bcf7a3107c72ef
- affected 238b8721a554a33a451a3f13bdb5be8fe5cfc927 – < 6bd697b5fc39fd24e2aa418c7b7d14469f550a93
- affected 2.6.20
- unaffected < 2.6.20
- unaffected 5.4.296 – ≤ 5.4.*
- unaffected 5.15.187 – ≤ 5.15.*
- unaffected 6.1.143 – ≤ 6.1.*
- unaffected 6.6.96 – ≤ 6.6.*
- unaffected 6.12.36 – ≤ 6.12.*
- unaffected 6.15.5 – ≤ 6.15.*
- unaffected 6.16 – ≤ *
References
References8
- https://git.kernel.org/stable/c/5015eed450005bab6e5cb6810f7a62eab0434fc4 (opens in a new tab)
- https://git.kernel.org/stable/c/9c905fdbba68a6d73d39a6b7de9b9f0d6c46df87 (opens in a new tab)
- https://git.kernel.org/stable/c/6db06aaea07bb7c8e33a425cf7b98bf29ee6056e (opens in a new tab)
- https://git.kernel.org/stable/c/8e958d10dd0ce5ae674cce460db5c9ca3f25243b (opens in a new tab)
- https://git.kernel.org/stable/c/685d29f2c5057b32c7b1b46f2a7d303b926c8f72 (opens in a new tab)
- https://git.kernel.org/stable/c/f5e4229d94792b40e750f30c92bcf7a3107c72ef (opens in a new tab)
- https://git.kernel.org/stable/c/6bd697b5fc39fd24e2aa418c7b7d14469f550a93 (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-20799 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-38262)Record last updated .