Is there a public exploit for CVE-2026-90833?

No public exploit for CVE-2026-90833 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-90833?

CVE-2026-90833 scores CVSS 7.8 (v3.1), rated high.

What does CVE-2026-90833 affect?

CVE-2026-90833 affects zephyrproject Zephyr.

7.8 High

The simulated EEPROM driver validated access ranges in eepromrangeisvalid() (drivers/eeprom/eepromsimulator.c) with a single test, (offset…

CVE-2026-90833

The simulated EEPROM driver validated access ranges in eepromrangeisvalid() (drivers/eeprom/eepromsimulator.c) with a single test, (offset + len) size. Because offset is a signed offt and len an unsigned sizet of the same rank, the addition is evaluated in unsigned arithmetic: a negative offset combined with a compensating len wraps the sum back into the accepted range. eepromsimread() and eepromsimwrite() then memcpy() through the EEPROM(addr) macro, which is plain pointer arithmetic on the driver's static mockeeprom array, so the copy addresses memory located before that array. eepromread() and eepromwrite() are syscall entry points, and their verification handlers in drivers/eeprom/eepromhandlers.c check only the device object and the caller's own data buffer (KSYSCALLMEMORYREAD/KSYSCALLMEMORYWRITE) — the offset argument is passed to the driver unvalidated. With CONFIGUSERSPACE=y, a CONFIGEEPROMSIMULATOR device instance, and the device object granted to a user thread (the usage the in-tree tests/drivers/eeprom/api suite exercises from ZTESTUSER threads), an unprivileged thread could supply a negative offset and have the kernel perform the copy on its behalf. The result is an…

Assessment

CVSS: 7.8 (v3.1)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 10 November 2026
Last updated: 10 November 2026
Affected: zephyrproject · Zephyr
Assigner: zephyr

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

At the source

EUVD (ENISA)

References

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