CVE-2026-89776
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
vxlan: vnifilter: enforce exact length of GROUP/GROUP6 attributes
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| f9c4bb0b245cee35ef66f75bf409c9573d934cf9 | affected | git | e12c4663529699f457b2988c1dfedf4d13b3b3be | Unavailable | None listed |
| f9c4bb0b245cee35ef66f75bf409c9573d934cf9 | affected | git | 47bfcc871576eaef6c8edab6749acd4b317306ea | Unavailable | None listed |
| f9c4bb0b245cee35ef66f75bf409c9573d934cf9 | affected | git | a9ec10815199f9879ba080241dc555efb1daf324 | Unavailable | None listed |
| f9c4bb0b245cee35ef66f75bf409c9573d934cf9 | affected | git | daebc7064a1b4c12c98e52c4bceede7f2fcd573c | Unavailable | None listed |
| f9c4bb0b245cee35ef66f75bf409c9573d934cf9 | affected | git | ad32e564c62ebf5ba76dd60a22af52c69d54d17b | Unavailable | None listed |
| f9c4bb0b245cee35ef66f75bf409c9573d934cf9 | affected | git | 984f831dda31b3a18f47454cf64989f65402879e | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.18 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.18 | Unavailable | None listed |
| 6.1.188 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.157 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.110 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.52 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.6 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |