VulnerabilityPublished 19 Jul 2026Updated 30 Oct 2026

CVE-2026-53376: Linux kernel · drm/amdkfd: Add upper bound check for num_of_nodes

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in f0f19e614cdd7d9cff2fb280cf923c99256d7915 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 12:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Patch: Available – fixed in f0f19e614cdd7d9cff2fb280cf923c99256d7915, 74b73fa56a395d46745e4f245225963e9f8be7f1, 44d5a450c04d3d734c13a03561c3131020d66edf +3

Exploitation evidence

Disclosed: evidence found.
CVE published 19 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ c7bcbfa4f8d1e0e1078adfe959d4b65542bccf66, < f0f19e614cdd7d9cff2fb280cf923c99256d7915	Fixed in f0f19e614cdd7d9cff2fb280cf923c99256d7915
LinuxLinux	Affected ≥ c7bcbfa4f8d1e0e1078adfe959d4b65542bccf66, < 74b73fa56a395d46745e4f245225963e9f8be7f1	Fixed in 74b73fa56a395d46745e4f245225963e9f8be7f1
LinuxLinux	Affected ≥ c7bcbfa4f8d1e0e1078adfe959d4b65542bccf66, < 44d5a450c04d3d734c13a03561c3131020d66edf	Fixed in 44d5a450c04d3d734c13a03561c3131020d66edf
LinuxLinux	Affected ≥ c7bcbfa4f8d1e0e1078adfe959d4b65542bccf66, < 7b80137eb8aa9d1cbfe7ccf3eeb1faa94ae35d7e	Fixed in 7b80137eb8aa9d1cbfe7ccf3eeb1faa94ae35d7e
LinuxLinux	Affected ≥ c7bcbfa4f8d1e0e1078adfe959d4b65542bccf66, < 6ba6ec5fcbb0d03ca11ed1cc38d57a7deb6c6b20	Fixed in 6ba6ec5fcbb0d03ca11ed1cc38d57a7deb6c6b20
LinuxLinux	Affected ≥ c7bcbfa4f8d1e0e1078adfe959d4b65542bccf66, < 4a8093c7def141cc6e854fbe3f9693867982418f	Fixed in 4a8093c7def141cc6e854fbe3f9693867982418f

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available and has been applied in the Linux kernel after version 4.17. Users and administrators should update their Linux kernel to a version including the referenced commits to mitigate this vulnerability.

Description

A vulnerability in the Linux kernel's drm/amdkfd component was fixed by adding an upper bound check for the num_of_nodes parameter in the kfd_ioctl_get_process_apertures_new function. This flaw could potentially allow improper handling of node counts, which may lead to unexpected behavior or security issues. The issue affects Linux kernel version 4.17 and has been addressed in subsequent commits.

Impact

Without the upper bound check, the vulnerability could lead to improper memory access or corruption within the kernel's AMD KFD (Kernel Fusion Driver) ioctl interface. This may result in system instability or privilege escalation, depending on exploitation. However, no known exploits in the wild have been reported for this issue.

Summary

The Linux kernel's drm/amdkfd subsystem contained a vulnerability due to the lack of an upper bound check on the num_of_nodes parameter in the kfd_ioctl_get_process_apertures_new ioctl handler. This could allow an attacker to supply an out-of-range value for num_of_nodes, potentially causing memory corruption or other unintended effects. The vulnerability was resolved by adding an upper bound check to validate num_of_nodes before processing. The fix has been applied in multiple commits following version 4.17.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Oct 2026, 12:35 UTC

Technical details

References

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