z_erofs_lz4_handle_overlap() · erofs: fix unsigned underflow
Affects MicrosoftSource GCVE Database
Not known to be exploited.
Data as of 30 Oct 2026, 11:52 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 2 May 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.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Microsoftmicrosoft/azure-linuxpkg:rpm/microsoft/azure-linuxOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
No specific mitigation or workaround information is provided at this time.
Description
CVE-2026-45999 is a vulnerability in the erofs component related to an unsigned underflow in the function z_erofs_lz4_handle_overlap(). The vulnerability affects Microsoft products including Azure Linux 3.0. No CVSS score or detailed impact information is provided. There is no indication of known exploits in the wild. Patch status is not confirmed as no patch or vendor advisory details about remediation are available.