CVE-2026-64055net: ethernet: cortina: Carry over frag counter
- 9.8CriticalCVSS base score
- 0.51%Exploitation in 30 daysEPSS · top 56% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: cortina: Carry over frag counter The gmac_rx() NAPI poll function assembles packets in an SKB from a ring buffer. If the ring buffer gets completely emptied during a poll cycle, we exit gmac_rx(), but the packet is not yet completely assembled in the SKB, yet the fragment counter frag_nr is reset to zero on the next invocation. Solve this by making the RX fragment counter a part of the port struct, and carry it over between invocations. Reset the fragment counter only right after calling napi_gro_frags(), on error (after calling napi_free_frags()) or if stopping the port. Reset it in some place where not strictly necessary just to emphasize what is going on. This was found by Sashiko during normal patch review.
Timeline
ID reserved
By Linux
Published
- 17 days later
· 17 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.51% · top 56% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 – < df31e3b64455293df1ea89c7da7d5c9bfbcdd253
- affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 – < 7af1fabdee744b7995fe01b30b77dfc397657cb5
- affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 – < 75105fcf73f1ce7d9f769aaefec6e6d6645d5ac0
- affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 – < 78cf08b3be47c28f07008a76c932bad7cdffa9d8
- affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 – < 7123cf481e21b54eb6adc4cb0d8dc2876aeaee41
- affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 – < c373b34877afea61c89e0dd2e38948c624249b9b
- affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 – < 46806096f35b8d3dfa2f321ddd77f597edcdb85f
- affected 4d5ae32f5e1e13f7f36d6439ec3257993b9f5b88 – < ebd8ec2b309e3a447851b456ccaf8fb39f3661e7
- affected 4.16
- unaffected < 4.16
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.142 – ≤ 6.6.*
- unaffected 6.12.92 – ≤ 6.12.*
- unaffected 6.18.34 – ≤ 6.18.*
- unaffected 7.0.11 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References8
- https://git.kernel.org/stable/c/df31e3b64455293df1ea89c7da7d5c9bfbcdd253 (opens in a new tab)
- https://git.kernel.org/stable/c/7af1fabdee744b7995fe01b30b77dfc397657cb5 (opens in a new tab)
- https://git.kernel.org/stable/c/75105fcf73f1ce7d9f769aaefec6e6d6645d5ac0 (opens in a new tab)
- https://git.kernel.org/stable/c/78cf08b3be47c28f07008a76c932bad7cdffa9d8 (opens in a new tab)
- https://git.kernel.org/stable/c/7123cf481e21b54eb6adc4cb0d8dc2876aeaee41 (opens in a new tab)
- https://git.kernel.org/stable/c/c373b34877afea61c89e0dd2e38948c624249b9b (opens in a new tab)
- https://git.kernel.org/stable/c/46806096f35b8d3dfa2f321ddd77f597edcdb85f (opens in a new tab)
- https://git.kernel.org/stable/c/ebd8ec2b309e3a447851b456ccaf8fb39f3661e7 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45628 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-64055)Record last updated .