CVE-2026-46065: linux
Vulnerability summary
CVE-2026-46065 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 39 · Related 39Timeline
- 27-05-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.13%
Chance of exploitation in the next 30 days
Percentile
2%
Versus all other CVEs
30-day change
0.00 pp
From 0.13% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-401Missing Release of Memory after Effective LifetimeThe product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
- CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
Affected systems
Ubuntu159 products
- linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-136.136 | < 7.0.0-27.27
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1061.64 | < 7.0.0-1008.8
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 60b59beafba875aef6d378078bce0baf2287ae14, < 4aab89603b637a2e441b38808c4f6fe7d1184df6 | ≥ 60b59beafba875aef6d378078bce0baf2287ae14, < 4fda0d6b45faad44926dd3e4f55f118d899b2e27 | ≥ 60b59beafba875aef6d378078bce0baf2287ae14, < 2a40f8bc9bb713329f1c35ffc199ee961a7135b0 | ≥ 60b59beafba875aef6d378078bce0baf2287ae14, < 2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066 | ≥ 60b59beafba875aef6d378078bce0baf2287ae14, < 25c2b77bc463f29ee71a54b883548baf9386a0db | ≥ 60b59beafba875aef6d378078bce0baf2287ae14, < a0aafb421dd15e935d81543152617f2742cefa70 | ≥ 60b59beafba875aef6d378078bce0baf2287ae14, < 9ded47ad003f09a94b6a710b5c47f4aa5ceb7429 | 2.6.22
- linux_kernel≥ 2.6.22, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.88 | ≥ 6.13, < 6.18.30 | ≥ 6.19, < 7.0.4
Debian1 product
- linux< 6.1.176-1 | < 6.12.88-1 | < 7.0.4-1
3 vendors · 162 products
