CVE-2022-50365

EPSS 0.04%
Published 17.09.2025 14:56:16
Last modified 18.09.2025 13:43:34
Source 416baaa9-dc9f-4396-8d5f-8c081f
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In the Linux kernel, the following vulnerability has been resolved:

skbuff: Account for tail adjustment during pull operations

Extending the tail can have some unexpected side effects if a program uses
a helper like BPF_FUNC_skb_pull_data to read partial content beyond the
head skb headlen when all the skbs in the gso frag_list are linear with no
head_frag -

  kernel BUG at net/core/skbuff.c:4219!
  pc : skb_segment+0xcf4/0xd2c
  lr : skb_segment+0x63c/0xd2c
  Call trace:
   skb_segment+0xcf4/0xd2c
   __udp_gso_segment+0xa4/0x544
   udp4_ufo_fragment+0x184/0x1c0
   inet_gso_segment+0x16c/0x3a4
   skb_mac_gso_segment+0xd4/0x1b0
   __skb_gso_segment+0xcc/0x12c
   udp_rcv_segment+0x54/0x16c
   udp_queue_rcv_skb+0x78/0x144
   udp_unicast_rcv_skb+0x8c/0xa4
   __udp4_lib_rcv+0x490/0x68c
   udp_rcv+0x20/0x30
   ip_protocol_deliver_rcu+0x1b0/0x33c
   ip_local_deliver+0xd8/0x1f0
   ip_rcv+0x98/0x1a4
   deliver_ptype_list_skb+0x98/0x1ec
   __netif_receive_skb_core+0x978/0xc60

Fix this by marking these skbs as GSO_DODGY so segmentation can handle
the tail updates accordingly.

Affected products Warnungen 0 Metrics 1 CWE 0 References 12

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VendorLinux

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Product Linux

Default Statusunaffected

Version < ff3743d00f41d803e6ab9334962b674f3b7fd0cb

Version 162a5a8c3aff15c449e6b38355cdf80ab4f77a5a

Status affected

Version < 6ac417d71b80e74b002313fcd73f7e9008e8e457

Version 55fb612bef7fd237fb70068e2b6ff1cd1543a8ef

Status affected

Version < 2d59f0ca153e9573ec4f140988c0ccca0eb4181b

Version 821302dd0c51d29269ef73a595bdff294419e2cd

Status affected

Version < 668dc454bcbd1da73605201ff43f988c70848215