CVE-2022-48999

Summary

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

ipv4: Handle attempt to delete multipath route when fib_info contains an nh reference

Gwangun Jung reported a slab-out-of-bounds access in fib_nh_match: fib_nh_match+0xf98/0x1130 linux-6.0-rc7/net/ipv4/fib_semantics.c:961 fib_table_delete+0x5f3/0xa40 linux-6.0-rc7/net/ipv4/fib_trie.c:1753 inet_rtm_delroute+0x2b3/0x380 linux-6.0-rc7/net/ipv4/fib_frontend.c:874

Separate nexthop objects are mutually exclusive with the legacy multipath spec. Fix fib_nh_match to return if the config for the to be deleted route contains a multipath spec while the fib_info is using a nexthop object.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux493ced1ac47c48bb86d9d4e8e87df8592be85a0e < cc3cd130ecfb8b0ae52e235e487bae3f16a24a32affected
LinuxLinux493ced1ac47c48bb86d9d4e8e87df8592be85a0e < 0b5394229ebae09afc07aabccb5ffd705ffd250eaffected
LinuxLinux493ced1ac47c48bb86d9d4e8e87df8592be85a0e < 25174d91e4a32a24204060d283bd5fa6d0ddf133affected
LinuxLinux493ced1ac47c48bb86d9d4e8e87df8592be85a0e < bb20a2ae241be846bc3c11ea4b3a3c69e41d51f2affected
LinuxLinux493ced1ac47c48bb86d9d4e8e87df8592be85a0e < 61b91eb33a69c3be11b259c5ea484505cd79f883affected
LinuxLinux5.3affected
LinuxLinux0 < 5.3unaffected
LinuxLinux5.4.226 <= 5.4.*unaffected
LinuxLinux5.10.158 <= 5.10.*unaffected
LinuxLinux5.15.82 <= 5.15.*unaffected
LinuxLinux6.0.12 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References