CVE-2021-39535
CVE-2021-39535 is a medium-severity vulnerability in Libxsmm Project Libxsmm with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.
Key facts
- Severity: Medium (CVSS 3.x base score 6.5)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (53rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-476
- Affected product: Libxsmm Project Libxsmm
- Published:
- Last modified:
Description
An issue was discovered in libxsmm through v1.16.1-93. A NULL pointer dereference exists in JIT code. It allows an attacker to cause Denial of Service.
Frequently asked questions
- What is CVE-2021-39535?
- An issue was discovered in libxsmm through v1.16.1-93. A NULL pointer dereference exists in JIT code. It allows an attacker to cause Denial of Service.
- How severe is CVE-2021-39535?
- CVE-2021-39535 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2021-39535 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-39535?
- CVE-2021-39535 affects Libxsmm Project Libxsmm. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-39535?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-39535 published?
- CVE-2021-39535 was published on 2021-09-20 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:libxsmm_project:libxsmm:*:*:*:*:*:*:*:*
More vulnerabilities in Libxsmm Project Libxsmm
- CVE-2021-39536 — High (CVSS 8.8): An issue was discovered in libxsmm through v1.16.1-93. The JIT code has a heap-based buffer overflow.
- CVE-2018-20542 — High (CVSS 8.8): There is a heap-based buffer-overflow at generator_spgemm_csc_reader.c (function libxsmm_sparse_csc_reader) in LIBXSMM…
- CVE-2018-20541 — High (CVSS 8.8): There is a heap-based buffer overflow in libxsmm_sparse_csc_reader at generator_spgemm_csc_reader.c in LIBXSMM 1.10, a…
- CVE-2018-20543 — Medium (CVSS 6.5): There is an attempted excessive memory allocation at libxsmm_sparse_csc_reader in generator_spgemm_csc_reader.c in…
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