How severe is CVE-2021-30218?

CVE-2021-30218 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-30218 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30218?

CVE-2021-30218 affects Samurai Project Samurai. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-30218?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-30218 published?

CVE-2021-30218 was published on 2021-04-29 and last updated on 2026-06-17.

CVE-2021-30218

CVE-2021-30218 is a medium-severity vulnerability in Samurai Project Samurai 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. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Samurai Project Samurai
Published: 2021-04-29
Last modified: 2026-06-17

Description

samurai 1.2 has a NULL pointer dereference in writefile() in util.c via a crafted build file.

Frequently asked questions

What is CVE-2021-30218?: samurai 1.2 has a NULL pointer dereference in writefile() in util.c via a crafted build file.
How severe is CVE-2021-30218?: CVE-2021-30218 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-30218 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30218?: CVE-2021-30218 affects Samurai Project Samurai. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-30218?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-30218 published?: CVE-2021-30218 was published on 2021-04-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:samurai_project:samurai:1.2:*:*:*:*:*:*:*

More vulnerabilities in Samurai Project Samurai

CVE-2019-19795 — High (CVSS 7.8): samurai 0.7 has a heap-based buffer overflow in canonpath in util.c via a crafted build file.
CVE-2021-30219 — Medium (CVSS 5.5): samurai 1.2 has a NULL pointer dereference in printstatus() function in build.c via a crafted build file.

All CVEs affecting Samurai Project Samurai →

Other CWE-476 (NULL Pointer Dereference) vulnerabilities

CVE-2022-36648 — Critical (CVSS 10.0): The hardware emulation in the of_dpa_cmd_add_l2_flood of rocker device model in QEMU, as used in 7.0.0 and earlier,…
CVE-2020-14500 — Critical (CVSS 10.0): Secomea GateManager all versions prior to 9.2c, An attacker can send a negative value and overwrite arbitrary data.
CVE-2010-2495 — Critical (CVSS 10.0): The pppol2tp_xmit function in drivers/net/pppol2tp.c in the L2TP implementation in the Linux kernel before 2.6.34 does…
CVE-2026-46195 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building…
CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
CVE-2026-31436 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix possible wrong descriptor…

Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →