7.1

CVE-2021-4460: drm/amdkfd: Fix UBSAN shift-out-of-bounds warning

Modified
AliasesUBUNTU-CVE-2021-4460DEBIAN-CVE-2021-4460
Published 01-10-2025Last modified 11-08-2026

Vulnerability summary

CVE-2021-4460 is a high (CVSS 7.1) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.1, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 6 · Related 3
RHSA-2022:1988RHSA-2026:6953RHSA-2026:7003SUSE-SU-2025:03613-1SUSE-SU-2025:03626-1SUSE-SU-2025:4189-1

Timeline

  1. 01-10-2025
    PublishedVulnerability first disclosed.
  2. 11-08-2026
    Last modifiedVulnerability information updated.

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

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu100 products
  • linux< 5.4.0-77.86
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1051.53
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 35cdc81bfa94d10373ecae279f3c48ca858ac4fd, < 0c0356ef2498c1a250fe3846f30293f828737309 | ≥ 35cdc81bfa94d10373ecae279f3c48ca858ac4fd, < 1874b0ef1426b873de94c61861e38f29a8df714c | ≥ 35cdc81bfa94d10373ecae279f3c48ca858ac4fd, < 3fdc5182700910a685d23df57d65166e8556a266 | ≥ 35cdc81bfa94d10373ecae279f3c48ca858ac4fd, < 9069b1b542de8f3bbffef868aff41521b21485cf | ≥ 35cdc81bfa94d10373ecae279f3c48ca858ac4fd, < 50e2fc36e72d4ad672032ebf646cecb48656efe0 | 5.4
  • linux_kernel< 5.4.118 | ≥ 5.5, < 5.10.36 | ≥ 5.11, < 5.11.20 | ≥ 5.12, < 5.12.3
Debian1 product
  • linux< 5.10.38-1

3 vendors · 103 products

References

9 links