CVE-2026-43491
net: qrtr: ns: Limit the maximum server registration per node
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Limit the maximum server registration per node Current code does no bound checking on the number of servers added per node. A malicious client can flood NEW_SERVER messages and exhaust memory. Fix this issue by limiting the maximum number of server registrations to 256 per node. If the NEW_SERVER message is received for an old port, then don't restrict it as it will get replaced. While at it, also rate limit the error messages in the failure path of qrtr_ns_worker(). Note that the limit of 256 is chosen based on the current platform requirements. If requirement changes in the future, this limit can be increased.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
5.7
References 8
git.kernel.org
- stable/c/b48fc702b20233b809f01053232c3cd5083c97b4
- stable/c/991c431077b19176d3fe3bb54054c063776a8cdc
- stable/c/94914731ca0b99899dceadd80d2df00584a688ca
- stable/c/e6f6cd501fb54060940a6eb3f4103eeb5e426ae7
- stable/c/3efaad55cad1ded429e3a873bfece389058a526b
- stable/c/35fb4a0c077c5d1049c2628b769e0a1b1e65df0d
- stable/c/868202aa2adae427060a42d5bd663b4d782ec02c
- stable/c/d5ee2ff98322337951c56398e79d51815acbf955