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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.

PUBLISHED Reserved 2026-05-13 | Published 2026-05-27 | Updated 2026-05-27 | Assigner Linux

Product status

Default status
unaffected

71f28f3136aff5890cd56de78abc673f8393cad9 (git) before 4b4dff498f46e9802f71bc84258bf73065f51c6a
affected

71f28f3136aff5890cd56de78abc673f8393cad9 (git) before 31cac6acf77ece488f29fb8f79589d9298e969c8
affected

71f28f3136aff5890cd56de78abc673f8393cad9 (git) before dbe8e81a2ec608f87f79a34f6444cd62f6a243bb
affected

71f28f3136aff5890cd56de78abc673f8393cad9 (git) before f75a5555e0049e7857eae25b60aee98b80e287ec
affected

71f28f3136aff5890cd56de78abc673f8393cad9 (git) before 17d33ba7291100008360b5a354962db37ad80684
affected

71f28f3136aff5890cd56de78abc673f8393cad9 (git) before da7e4b75e50c087d2031a92f6646eb90f7045a67
affected

Default status
affected

6.0
affected

Any version before 6.0
unaffected

6.1.165 (semver)
unaffected

6.6.128 (semver)
unaffected

6.12.75 (semver)
unaffected

6.18.14 (semver)
unaffected

6.19.4 (semver)
unaffected

7.0 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/4b4dff498f46e9802f71bc84258bf73065f51c6a

git.kernel.org/...c/31cac6acf77ece488f29fb8f79589d9298e969c8

git.kernel.org/...c/dbe8e81a2ec608f87f79a34f6444cd62f6a243bb

git.kernel.org/...c/f75a5555e0049e7857eae25b60aee98b80e287ec

git.kernel.org/...c/17d33ba7291100008360b5a354962db37ad80684

git.kernel.org/...c/da7e4b75e50c087d2031a92f6646eb90f7045a67

cve.org (CVE-2026-45962)

nvd.nist.gov (CVE-2026-45962)

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