VulnerabilityDeferred

CVE-2025-68317

In the Linux kernel, the following vulnerability has been resolved: io_uring/zctx: check chained notif contexts Send zc only links ubuf_info for requests coming from the same context.

HIGH 7.8EPSS 0.14%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring/zctx: check chained notif contexts Send zc only links ubuf_info for requests coming from the same context. There are some ambiguous syz reports, so let's check the assumption on notification completion.

CVSS 3.1: 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.14% probability · 4th percentile
CISA KEV: Not listed
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

References

https://git.kernel.org/stable/c/aaafd17d3f4be2c15539359a5b4bfa00237f687f
https://git.kernel.org/stable/c/ab3ea6eac5f45669b091309f592c4ea324003053
https://git.kernel.org/stable/c/d664a3ce3a604231a0b144c152a3755d03b18b60

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.