CVE-2026-43491
net: qrtr: ns: Limit the maximum server registration per node
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd; < b48fc702b20233b809f01053232c3cd5083c97b4 (affected, git) ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd; < 991c431077b19176d3fe3bb54054c063776a8cdc (affected, git) ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd; < 94914731ca0b99899dceadd80d2df00584a688ca (affected, git) ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd; < e6f6cd501fb54060940a6eb3f4103eeb5e426ae7 (affected, git) ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd; < 3efaad55cad1ded429e3a873bfece389058a526b (affected, git) ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd; < 35fb4a0c077c5d1049c2628b769e0a1b1e65df0d (affected, git) ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd; < 868202aa2adae427060a42d5bd663b4d782ec02c (affected, git) ≥ 0c2204a4ad710d95d348ea006f14ba926e842ffd; < d5ee2ff98322337951c56398e79d51815acbf955 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
5.7 (affected) ≥ 0; < 5.7 (unaffected, semver) ≥ 5.10.265; ≤ 5.10.* (unaffected, semver) ≥ 5.15.216; ≤ 5.15.* (unaffected, semver) ≥ 6.1.183; ≤ 6.1.* (unaffected, semver) ≥ 6.6.140; ≤ 6.6.* (unaffected, semver) ≥ 6.12.86; ≤ 6.12.* (unaffected, semver) ≥ 6.18.27; ≤ 6.18.* (unaffected, semver) ≥ 7.0.4; ≤ 7.0.* (unaffected, semver) ≥ 7.1; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/b48fc702b20233b809f01053232c3cd5083c97b4CNA: Linux
- https://git.kernel.org/stable/c/991c431077b19176d3fe3bb54054c063776a8cdcCNA: Linux
- https://git.kernel.org/stable/c/94914731ca0b99899dceadd80d2df00584a688caCNA: Linux
- https://git.kernel.org/stable/c/e6f6cd501fb54060940a6eb3f4103eeb5e426ae7CNA: Linux
- https://git.kernel.org/stable/c/3efaad55cad1ded429e3a873bfece389058a526bCNA: Linux
- https://git.kernel.org/stable/c/35fb4a0c077c5d1049c2628b769e0a1b1e65df0dCNA: Linux
- https://git.kernel.org/stable/c/868202aa2adae427060a42d5bd663b4d782ec02cCNA: Linux
- https://git.kernel.org/stable/c/d5ee2ff98322337951c56398e79d51815acbf955CNA: Linux
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