[SRU][F][PATCH 0/2] CVE-2024-35896

[Massimiliano Pellizzer]

[Impact]

netfilter: validate user input for expected length

[Fix]

Noble:  Fixed
Jammy:  Fixed

Focal:
  Backported the fix commit (0f038242b77dd) from linux-5.10.y
  Cherry picked a follow-up of the fix commit (cf4bc359b7614) from
  linux-5.10.y

Bionic: Sent to ESM ML
Xenial: Sent to ESM ML

[Test Case]

Compile and boot tested.
Passed every test in the kselftest suite with target netfilter.

[Where problems could occur]

The fix affects the netfilter subsystem. A bug in the patch could
introduce issues during packet filtering, leading to mishandled packets
or memory access violation. Users may notice kernel warnings or system
crashes and they may experience network delays and dropped packets. 

Eric Dumazet (2):
  netfilter: validate user input for expected length
  netfilter: complete validation of user input

 net/bridge/netfilter/ebtables.c | 6 ++++++
 net/ipv4/netfilter/arp_tables.c | 8 ++++++++
 net/ipv4/netfilter/ip_tables.c  | 8 ++++++++
 net/ipv6/netfilter/ip6_tables.c | 8 ++++++++
 4 files changed, 30 insertions(+)

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2.43.0