How severe is CVE-2019-11366?

CVE-2019-11366 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-11366 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-11366?

CVE-2019-11366 affects Atftp Project Atftp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-11366?

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

When was CVE-2019-11366 published?

CVE-2019-11366 was published on 2019-04-20 and last updated on 2026-06-17.

CVE-2019-11366

CVE-2019-11366 is a medium-severity vulnerability in Atftp Project Atftp with a CVSS 3.x base score of 5.9. 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 5.9)
CVSS v2: 4.3
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Atftp Project Atftp
Published: 2019-04-20
Last modified: 2026-06-17

Description

An issue was discovered in atftpd in atftp 0.7.1. It does not lock the thread_list_mutex mutex before assigning the current thread data structure. As a result, the daemon is vulnerable to a denial of service attack due to a NULL pointer dereference. If thread_data is NULL when assigned to current, and modified by another thread before a certain tftpd_list.c check, there is a crash when dereferencing current->next.

Frequently asked questions

What is CVE-2019-11366?: An issue was discovered in atftpd in atftp 0.7.1. It does not lock the thread_list_mutex mutex before assigning the current thread data structure. As a result, the daemon is vulnerable to a denial of service attack due to a NULL pointer dereference. If thread_data is NULL when assigned to current, and modified by another thread before a certain tftpd_list.c check, there is a crash when dereferencing current->next.
How severe is CVE-2019-11366?: CVE-2019-11366 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-11366 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-11366?: CVE-2019-11366 affects Atftp Project Atftp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-11366?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-11366 published?: CVE-2019-11366 was published on 2019-04-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:atftp_project:atftp:0.7.1:*:*:*:*:*:*:*

More vulnerabilities in Atftp Project Atftp

CVE-2019-11365 — Critical (CVSS 9.8): An issue was discovered in atftpd in atftp 0.7.1. A remote attacker may send a crafted packet triggering a stack-based…
CVE-2021-41054 — High (CVSS 7.5): tftpd_file.c in atftp through 0.7.4 has a buffer overflow because buffer-size handling does not properly consider the…
CVE-2020-6097 — High (CVSS 7.5): An exploitable denial of service vulnerability exists in the atftpd daemon functionality of atftp…
CVE-2021-46671 — Medium (CVSS 5.3): options.c in atftp before 0.7.5 reads past the end of an array, and consequently discloses server-side /etc/group data…

All CVEs affecting Atftp Project Atftp →

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 →