CVE-2026-46065fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Undergoing Analysis
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 60b59beafba875aef6d378078bce0baf2287ae14 builds before 4aab89603b637a2e441b38808c4f6fe7d1184df6; 60b59beafba875aef6d378078bce0baf2287ae14 builds before 4fda0d6b45faad44926dd3e4f55f118d899b2e27; 60b59beafba875aef6d378078bce0baf2287ae14 builds before 2a40f8bc9bb713329f1c35ffc199ee961a7135b0; 60b59beafba875aef6d378078bce0baf2287ae14 builds before 2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066; 60b59beafba875aef6d378078bce0baf2287ae14 builds before 25c2b77bc463f29ee71a54b883548baf9386a0db; from 60b59beafba875aef6d378078bce0baf2287ae14 before a0aafb421dd15e935d81543152617f2742cefa70; 60b59beafba875aef6d378078bce0baf2287ae14 builds before 9ded47ad003f09a94b6a710b5c47f4aa5ceb7429 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.22 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.140; from 6.7 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.4 | NVD |
References
- https://git.kernel.org/stable/c/4aab89603b637a2e441b38808c4f6fe7d1184df6patch
- https://git.kernel.org/stable/c/4fda0d6b45faad44926dd3e4f55f118d899b2e27patch
- https://git.kernel.org/stable/c/2a40f8bc9bb713329f1c35ffc199ee961a7135b0patch
- https://git.kernel.org/stable/c/2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066patch
- https://git.kernel.org/stable/c/25c2b77bc463f29ee71a54b883548baf9386a0dbpatch
- https://git.kernel.org/stable/c/a0aafb421dd15e935d81543152617f2742cefa70patch
- https://git.kernel.org/stable/c/9ded47ad003f09a94b6a710b5c47f4aa5ceb7429patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.