CVE-2026-64414netfilter: handle unreadable frags
- 7.5HighCVSS base score
- 0.44%Exploitation in 30 daysEPSS · top 61% 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: netfilter: handle unreadable frags sashiko reports: When an skb with unreadable fragments (such as from devmem TCP, where skb_frags_readable(skb) returns false) is processed by the u32 module, skb_copy_bits() will safely return a negative error code [..] xt_u32: bail out with hotdrop in this case. gather_frags: return -1, just as if we had no fragment header. nfnetlink_queue: restrict to the linear part. nfnetlink_log: restrict to the linear part. v2: - skb_zerocopy helpers don't copy readable flag, i.e. nfnetlink_queue is broken too xt_u32 shouldn't return true if hotdrop was set.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 23 days later
· 23 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 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Analyzed | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.44% · top 61% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected 65249feb6b3df9e17bab5911ee56fa7b0971e231 – < 3b13e7635795394705920cca1e1db7e4ca2e334b
- affected 65249feb6b3df9e17bab5911ee56fa7b0971e231 – < fc5bfe63bacf8a3ae307b62b34206406ca733354
- affected 65249feb6b3df9e17bab5911ee56fa7b0971e231 – < 57056be3ec12e7d9ecd20a60d4060f510e4f284c
- affected 65249feb6b3df9e17bab5911ee56fa7b0971e231 – < da5b58478a9c1b85608c9e40a3b8432d071b409e
- affected 6.12
- unaffected < 6.12
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/3b13e7635795394705920cca1e1db7e4ca2e334b (opens in a new tab)
- https://git.kernel.org/stable/c/fc5bfe63bacf8a3ae307b62b34206406ca733354 (opens in a new tab)
- https://git.kernel.org/stable/c/57056be3ec12e7d9ecd20a60d4060f510e4f284c (opens in a new tab)
- https://git.kernel.org/stable/c/da5b58478a9c1b85608c9e40a3b8432d071b409e (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-2026-48958 (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)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64414)Record last updated .