CVE-2024-26849

Summary

In the Linux kernel, the following vulnerability has been resolved:

netlink: add nla be16/32 types to minlen array

BUG: KMSAN: uninit-value in nla_validate_range_unsigned lib/nlattr.c:222 [inline] BUG: KMSAN: uninit-value in nla_validate_int_range lib/nlattr.c:336 [inline] BUG: KMSAN: uninit-value in validate_nla lib/nlattr.c:575 [inline] BUG: KMSAN: uninit-value in __nla_validate_parse+0x2e20/0x45c0 lib/nlattr.c:631 nla_validate_range_unsigned lib/nlattr.c:222 [inline] nla_validate_int_range lib/nlattr.c:336 [inline] validate_nla lib/nlattr.c:575 [inline] …

The message in question matches this policy:

[NFTA_TARGET_REV] = NLA_POLICY_MAX(NLA_BE32, 255),

but because NLA_BE32 size in minlen array is 0, the validation code will read past the malformed (too small) attribute.

Note: Other attributes, e.g. BITFIELD32, SINT, UINT.. are also missing: those likely should be added too.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux24ea1c8abaae6541ad95912422a9af4fb858428d < 000a68159c0326b46c42ec712ab98793e7e625a7affected
LinuxLinuxcbfac0add2afe8960a09806012313765a2179423 < 80b40f9cb87f3bf5877dfb852765cf92bc03ca77affected
LinuxLinuxecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f < 0ac219c4c3ab253f3981f346903458d20bacab32affected
LinuxLinuxecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f < a2ab028151841cd833cb53eb99427e0cc990112daffected
LinuxLinuxecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f < 7a9d14c63b35f89563c5ecbadf918ad64979712daffected
LinuxLinuxecaf75ffd5f5db320d8b1da0198eef5a5ce64a3f < 9a0d18853c280f6a0ee99f91619f2442a17a323aaffected
LinuxLinux6.1affected
LinuxLinux0 < 6.1unaffected
LinuxLinux6.1.81 <= 6.1.*unaffected
LinuxLinux6.6.21 <= 6.6.*unaffected
LinuxLinux6.7.9 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References