CVE-2026-46065fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% 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: fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info Hold state of deferred I/O in struct fb_deferred_io_state. Allocate an instance as part of initializing deferred I/O and remove it only after the final mapping has been closed. If the fb_info and the contained deferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info to invalidate the mapping. Any access will then result in a SIGBUS signal. Fixes a long-standing problem, where a device hot-unplug happens while user space still has an active mapping of the graphics memory. The hot- unplug frees the instance of struct fb_info. Accessing the memory will operate on undefined state.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 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 · Undergoing Analysis | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% 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 60b59beafba875aef6d378078bce0baf2287ae14 – < 4aab89603b637a2e441b38808c4f6fe7d1184df6
- affected 60b59beafba875aef6d378078bce0baf2287ae14 – < 4fda0d6b45faad44926dd3e4f55f118d899b2e27
- affected 60b59beafba875aef6d378078bce0baf2287ae14 – < 2a40f8bc9bb713329f1c35ffc199ee961a7135b0
- affected 60b59beafba875aef6d378078bce0baf2287ae14 – < 2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066
- affected 60b59beafba875aef6d378078bce0baf2287ae14 – < 25c2b77bc463f29ee71a54b883548baf9386a0db
- affected 60b59beafba875aef6d378078bce0baf2287ae14 – < a0aafb421dd15e935d81543152617f2742cefa70
- affected 60b59beafba875aef6d378078bce0baf2287ae14 – < 9ded47ad003f09a94b6a710b5c47f4aa5ceb7429
- affected 2.6.22
- unaffected < 2.6.22
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.140 – ≤ 6.6.*
- unaffected 6.12.88 – ≤ 6.12.*
- unaffected 6.18.30 – ≤ 6.18.*
- unaffected 7.0.4 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References8
- https://git.kernel.org/stable/c/4aab89603b637a2e441b38808c4f6fe7d1184df6 (opens in a new tab)
- https://git.kernel.org/stable/c/4fda0d6b45faad44926dd3e4f55f118d899b2e27 (opens in a new tab)
- https://git.kernel.org/stable/c/2a40f8bc9bb713329f1c35ffc199ee961a7135b0 (opens in a new tab)
- https://git.kernel.org/stable/c/2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066 (opens in a new tab)
- https://git.kernel.org/stable/c/25c2b77bc463f29ee71a54b883548baf9386a0db (opens in a new tab)
- https://git.kernel.org/stable/c/a0aafb421dd15e935d81543152617f2742cefa70 (opens in a new tab)
- https://git.kernel.org/stable/c/9ded47ad003f09a94b6a710b5c47f4aa5ceb7429 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.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-2026-32447 (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-2026-46065)Record last updated .