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VulnerabilityPublished Updated

CVE-2026-23122: Linux kernel · igc: Reduce TSN TX packet buffer from 7KB to 5KB per queue

Affects Linux kernelSource CVE Database V5

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Not known to be exploited : upgrade to 88037973c8ef6032bf84e9955595f8b20bc14c21 or 8ad1b6c1e63d25f5465b7a8aa403bdcee84b86f9 when convenient.

Data as of 5 Nov 2026, 23:24 UTC

Severity
Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
EPSS
0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch
Available – fixed in 88037973c8ef6032bf84e9955595f8b20bc14c21, 8ad1b6c1e63d25f5465b7a8aa403bdcee84b86f9

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 5 Nov 2026.

What to do

Upgrade Linux kernel to 88037973c8ef6032bf84e9955595f8b20bc14c21 or 8ad1b6c1e63d25f5465b7a8aa403bdcee84b86f9.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 0d58cdc902dace2298406b3972def04f55e3d775, < 88037973c8ef6032bf84e9955595f8b20bc14c21
Fixed in
  • 88037973c8ef6032bf84e9955595f8b20bc14c21
LinuxLinuxAffected
  • ≥ 0d58cdc902dace2298406b3972def04f55e3d775, < 8ad1b6c1e63d25f5465b7a8aa403bdcee84b86f9
Fixed in
  • 8ad1b6c1e63d25f5465b7a8aa403bdcee84b86f9
LinuxLinuxAffected
  • =6.16
Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: igc: Reduce TSN TX packet buffer from 7KB to 5KB per queue The previous 7 KB per queue caused TX unit hangs under heavy timestamping load. Reducing to 5 KB avoids these hangs and matches the TSN recommendation in I225/I226 SW User Manual Section 7.5.4. The 8 KB "freed" by this change is currently unused. This reduction is not expected to impact throughput, as the i226 is PCIe-limited for small TSN packets rather than TX-buffer-limited.

References

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