CVE-2021-4460
Medium
Elevated severity or exploit probability.
CVSS base
7.1
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
EPSS — probability of exploitation (30 days)
0.2%
5.5th percentile
CISA KEV
Not listed
Weakness / dates
CWE-125
Published 2025-10-01 · modified 2026-08-11
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | L | Low |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | N | None |
| Availability | H | High |
Timeline
- 2025-10-01 — Published (NVD)
- 2026-08-11 — Last modified (NVD)
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix UBSAN shift-out-of-bounds warning If get_num_sdma_queues or get_num_xgmi_sdma_queues is 0, we end up doing a shift operation where the number of bits shifted equals number of bits in the operand. This behaviour is undefined. Set num_sdma_queues or num_xgmi_sdma_queues to ULLONG_MAX, if the count is >= number of bits in the operand. Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1472
Affected
References
- https://git.kernel.org/stable/c/0c0356ef2498c1a250fe3846f30293f828737309
- https://git.kernel.org/stable/c/1874b0ef1426b873de94c61861e38f29a8df714c
- https://git.kernel.org/stable/c/3fdc5182700910a685d23df57d65166e8556a266
- https://git.kernel.org/stable/c/50e2fc36e72d4ad672032ebf646cecb48656efe0
- https://git.kernel.org/stable/c/9069b1b542de8f3bbffef868aff41521b21485cf