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CVE-2026-89776

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Version < e12c4663529699f457b2988c1dfedf4d13b3b3be
Status affected
Version f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Version < 47bfcc871576eaef6c8edab6749acd4b317306ea
Status affected
Version f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Version < a9ec10815199f9879ba080241dc555efb1daf324
Status affected
Version f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Version < daebc7064a1b4c12c98e52c4bceede7f2fcd573c
Status affected
Version f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Version < ad32e564c62ebf5ba76dd60a22af52c69d54d17b
Status affected
Version f9c4bb0b245cee35ef66f75bf409c9573d934cf9
Version < 984f831dda31b3a18f47454cf64989f65402879e
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 5.18
Status affected
Version 0
Version < 5.18
Status unaffected
Version <= 6.1.*
Version 6.1.188
Status unaffected
Version <= 6.6.*
Version 6.6.157
Status unaffected
Version <= 6.12.*
Version 6.12.110
Status unaffected
Version <= 6.18.*
Version 6.18.52
Status unaffected
Version <= 7.2.*
Version 7.2.6
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.108
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/e12c4663529699f457b2988c1dfedf4d13b3b3be
https://git.kernel.org/stable/c/47bfcc871576eaef6c8edab6749acd4b317306ea
https://git.kernel.org/stable/c/a9ec10815199f9879ba080241dc555efb1daf324
https://git.kernel.org/stable/c/daebc7064a1b4c12c98e52c4bceede7f2fcd573c
https://git.kernel.org/stable/c/ad32e564c62ebf5ba76dd60a22af52c69d54d17b
https://git.kernel.org/stable/c/984f831dda31b3a18f47454cf64989f65402879e