CVE-2026-43491
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.
Does this matter?
Lower severity and a low EPSS score (0.15%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.15% probability · 4th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/35fb4a0c077c5d1049c2628b769e0a1b1e65df0dPatch
- https://git.kernel.org/stable/c/3efaad55cad1ded429e3a873bfece389058a526bPatch
- https://git.kernel.org/stable/c/868202aa2adae427060a42d5bd663b4d782ec02cPatch
- https://git.kernel.org/stable/c/94914731ca0b99899dceadd80d2df00584a688ca
- https://git.kernel.org/stable/c/991c431077b19176d3fe3bb54054c063776a8cdc
- https://git.kernel.org/stable/c/b48fc702b20233b809f01053232c3cd5083c97b4
- https://git.kernel.org/stable/c/d5ee2ff98322337951c56398e79d51815acbf955Patch
- https://git.kernel.org/stable/c/e6f6cd501fb54060940a6eb3f4103eeb5e426ae7Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.