CVE-2026-89776vxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 89% 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: vxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes The VXLAN VNI filter entry policy declares the GROUP/GROUP6 address attributes as NLA_BINARY with only a maximum length, so validate_nla() accepts a payload shorter than the address. The GROUP consumer reads it with nla_get_in_addr(), an unconditional 4-byte load, so a short attribute over-reads up to 3 bytes of uninitialised slab data, which are stored into remote_ip and echoed back via RTM_GETTUNNEL, disclosing kernel memory. Switch both entries to NLA_POLICY_EXACT_LEN() so the validator rejects any GROUP/GROUP6 that is not exactly 4 / 16 bytes; a valid address is always sent at full width.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 33 days later
· 33 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected f9c4bb0b245cee35ef66f75bf409c9573d934cf9 – < e12c4663529699f457b2988c1dfedf4d13b3b3be
- affected f9c4bb0b245cee35ef66f75bf409c9573d934cf9 – < 47bfcc871576eaef6c8edab6749acd4b317306ea
- affected f9c4bb0b245cee35ef66f75bf409c9573d934cf9 – < a9ec10815199f9879ba080241dc555efb1daf324
- affected f9c4bb0b245cee35ef66f75bf409c9573d934cf9 – < daebc7064a1b4c12c98e52c4bceede7f2fcd573c
- affected f9c4bb0b245cee35ef66f75bf409c9573d934cf9 – < ad32e564c62ebf5ba76dd60a22af52c69d54d17b
- affected f9c4bb0b245cee35ef66f75bf409c9573d934cf9 – < 984f831dda31b3a18f47454cf64989f65402879e
- affected 5.18
- unaffected < 5.18
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/e12c4663529699f457b2988c1dfedf4d13b3b3be (opens in a new tab)
- https://git.kernel.org/stable/c/47bfcc871576eaef6c8edab6749acd4b317306ea (opens in a new tab)
- https://git.kernel.org/stable/c/a9ec10815199f9879ba080241dc555efb1daf324 (opens in a new tab)
- https://git.kernel.org/stable/c/daebc7064a1b4c12c98e52c4bceede7f2fcd573c (opens in a new tab)
- https://git.kernel.org/stable/c/ad32e564c62ebf5ba76dd60a22af52c69d54d17b (opens in a new tab)
- https://git.kernel.org/stable/c/984f831dda31b3a18f47454cf64989f65402879e (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-2026-80297 (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-2026-89776)Record last updated .