Answer in brief
CVE-2026-90324 records a High severity (CVSS 7.8) vulnerability in ublk: check import_ubuf() return value. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=981f95a571e3ca20a496c0b77dbf6b06039c6648 <0121c84adb6a4cd6f7560b5895bd88f9899bbc1f || >=981f95a571e3ca20a496c0b77dbf6b06039c6648 <5ac6019cb78e98c9608fda72726b36ddf8474dd7 || >=981f95a571e3ca20a496c0b77dbf6b06039c6648 <3831568792af75b6523fa93bb91560e29189cf55 | 0121c84adb6a4cd6f7560b5895bd88f9899bbc1f, 5ac6019cb78e98c9608fda72726b36ddf8474dd7, 3831568792af75b6523fa93bb91560e29189cf55 |
| Linux/Linuxgeneric | 6.5 | Not reported |
| Linux/Linuxgeneric | >=981f95a571e3ca20a496c0b77dbf6b06039c6648 <7f97c762b5f6e0005c5c7d040ded73bf7fb3587e || >=981f95a571e3ca20a496c0b77dbf6b06039c6648 <27ff6e8703f7a7160c728501da2f8ef8e7bb6b2f || >=981f95a571e3ca20a496c0b77dbf6b06039c6648 <0121c84adb6a4cd6f7560b5895bd88f9899bbc1f || >=981f95a571e3ca20a496c0b77dbf6b06039c6648 <5ac6019cb78e98c9608fda72726b36ddf8474dd7 || >=981f95a571e3ca20a496c0b77dbf6b06039c6648 <3831568792af75b6523fa93bb91560e29189cf55 | 7f97c762b5f6e0005c5c7d040ded73bf7fb3587e, 27ff6e8703f7a7160c728501da2f8ef8e7bb6b2f, 0121c84adb6a4cd6f7560b5895bd88f9899bbc1f, 5ac6019cb78e98c9608fda72726b36ddf8474dd7, 3831568792af75b6523fa93bb91560e29189cf55 |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: ublk: check import_ubuf() return value import_ubuf() can fail if the address range (provided by the userspace ublk server) is outside the allowed user address space. Return that 0 bytes were copied if import_ubuf() fails rather than passing an uninitialized struct iov_iter to ublk_copy_user_pages().
Quoted source text, attributed separately from HOL analysis.