CVE-2026-45962

ublk: Validate SQE128 flag before accessing the cmd

MEDIUM

5.5

CVSS Score

Published: May 27, 2026 at 12:18 PM UTC

Updated: June 17, 2026 at 10:52 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: ublk: Validate SQE128 flag before accessing the cmd ublk_ctrl_cmd_dump() accesses (header *)sqe->cmd before IO_URING_F_SQE128 flag check. This could cause out of boundary memory access. Move the SQE128 flag check earlier in ublk_ctrl_uring_cmd() to return -EINVAL immediately if the flag is not set.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

6.0 ≤ v < 6.1.1656.0 ≤ v < 6.12.756.0 ≤ v < 6.18.146.0 ≤ v < 6.19.46.0 ≤ v < 6.6.1286.0 ≤ v < 7.06.13 ≤ v < 6.18.146.19 ≤ v < 6.19.46.2 ≤ v < 6.6.1286.7 ≤ v < 6.12.756.071f28f3136aff5890cd56de78abc673f8393cad9

Vendor states this is fixed in 17d33ba7291100008360b5a354962db37ad80684 (fixed)

Vendor states this is fixed in 31cac6acf77ece488f29fb8f79589d9298e969c8 (fixed)

Vendor states this is fixed in 4b4dff498f46e9802f71bc84258bf73065f51c6a (fixed)

Vendor states this is fixed in da7e4b75e50c087d2031a92f6646eb90f7045a67 (fixed)

Vendor states this is fixed in dbe8e81a2ec608f87f79a34f6444cd62f6a243bb (fixed)

Vendor states this is fixed in f75a5555e0049e7857eae25b60aee98b80e287ec (fixed)

Vendor states this is fixed in 6.0 (unaffected)

Vendor states this is fixed in 6.1.165 (unaffected)

Vendor states this is fixed in 6.12.75 (unaffected)

Vendor states this is fixed in 6.18.14 (unaffected)

Vendor states this is fixed in 6.19.4 (unaffected)

Vendor states this is fixed in 6.6.128 (unaffected)