CVE-2026-45962
CVE-2026-45962 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-32246
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-45962?
- 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.
- How severe is CVE-2026-45962?
- CVE-2026-45962 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-45962 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-45962?
- CVE-2026-45962 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-45962?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-45962 have an EU (EUVD) identifier?
- Yes. CVE-2026-45962 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32246.
- When was CVE-2026-45962 published?
- CVE-2026-45962 was published on 2026-05-27 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/17d33ba7291100008360b5a354962db37ad80684
- https://git.kernel.org/stable/c/31cac6acf77ece488f29fb8f79589d9298e969c8
- https://git.kernel.org/stable/c/4b4dff498f46e9802f71bc84258bf73065f51c6a
- https://git.kernel.org/stable/c/da7e4b75e50c087d2031a92f6646eb90f7045a67
- https://git.kernel.org/stable/c/dbe8e81a2ec608f87f79a34f6444cd62f6a243bb
- https://git.kernel.org/stable/c/f75a5555e0049e7857eae25b60aee98b80e287ec
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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