{"id":"CVE-2026-23122","title":"igc: Reduce TSN TX packet buffer from 7KB to 5KB per queue","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nigc: Reduce TSN TX packet buffer from 7KB to 5KB per queue\n\nThe previous 7 KB per queue caused TX unit hangs under heavy\ntimestamping load. Reducing to 5 KB avoids thes…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 0d58cdc902dace2298406b3972def04f55e3d775 < 88037973c8ef6032bf84e9955595f8b20bc14c21","Linux >= 0d58cdc902dace2298406b3972def04f55e3d775 < 8ad1b6c1e63d25f5465b7a8aa403bdcee84b86f9","Linux 6.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:19:59.639985Z"},"published":"2026-02-14","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:23:18.093Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23122","references":[{"url":"https://git.kernel.org/stable/c/88037973c8ef6032bf84e9955595f8b20bc14c21"},{"url":"https://git.kernel.org/stable/c/8ad1b6c1e63d25f5465b7a8aa403bdcee84b86f9"}],"tags":["cve.org"],"epss":0.00117,"epssPercentile":0.01683,"ingestedAt":"2026-11-05T22:38:32.075Z","slug":"CVE-2026-23122","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nigc: Reduce TSN TX packet buffer from 7KB to 5KB per queue\n\nThe previous 7 KB per queue caused TX unit hangs under heavy\ntimestamping load. Reducing to 5 KB avoids these hangs and matches\nthe TSN recommendation in I225/I226 SW User Manual Section 7.5.4.\n\nThe 8 KB \"freed\" by this change is currently unused. This reduction\nis not expected to impact throughput, as the i226 is PCIe-limited\nfor small TSN packets rather than TX-buffer-limited.\n\n## Affected\n\n- `Linux >= 0d58cdc902dace2298406b3972def04f55e3d775 < 88037973c8ef6032bf84e9955595f8b20bc14c21`\n- `Linux >= 0d58cdc902dace2298406b3972def04f55e3d775 < 8ad1b6c1e63d25f5465b7a8aa403bdcee84b86f9`\n- `Linux 6.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}