Oracle Linux: CVE-2023-52700: ELSA-2024-4211: kernel security and bug fix update (IMPORTANT) (Multiple Advisories)

Oracle Linux: CVE-2023-52700: ELSA-2024-4211:kernel security and bug fix update (IMPORTANT) (Multiple Advisories)

Severity

5

CVSS

(AV:L/AC:L/Au:S/C:N/I:N/A:C)

Published

05/21/2024

Created

07/04/2024

Added

07/03/2024

Modified

01/07/2025

Description

In the Linux kernel, the following vulnerability has been resolved: tipc: fix kernel warning when sending SYN message When sending a SYN message, this kernel stack trace is observed: ... [ 13.396352] RIP: 0010:_copy_from_iter+0xb4/0x550 ... [ 13.398494] Call Trace: [ 13.398630]<TASK> [ 13.398630]? __alloc_skb+0xed/0x1a0 [ 13.398630]tipc_msg_build+0x12c/0x670 [tipc] [ 13.398630]? shmem_add_to_page_cache.isra.71+0x151/0x290 [ 13.398630]__tipc_sendmsg+0x2d1/0x710 [tipc] [ 13.398630]? tipc_connect+0x1d9/0x230 [tipc] [ 13.398630]? __local_bh_enable_ip+0x37/0x80 [ 13.398630]tipc_connect+0x1d9/0x230 [tipc] [ 13.398630]? __sys_connect+0x9f/0xd0 [ 13.398630]__sys_connect+0x9f/0xd0 [ 13.398630]? preempt_count_add+0x4d/0xa0 [ 13.398630]? fpregs_assert_state_consistent+0x22/0x50 [ 13.398630]__x64_sys_connect+0x16/0x20 [ 13.398630]do_syscall_64+0x42/0x90 [ 13.398630]entry_SYSCALL_64_after_hwframe+0x63/0xcd It is because commit a41dad905e5a ("iov_iter: saner checks for attempt to copy to/from iterator") has introduced sanity check for copying from/to iov iterator. Lacking of copy direction from the iterator viewpoint would lead to kernel stack trace like above. This commit fixes this issue by initializing the iov iterator with the correct copy direction when sending SYN or ACK without data.

Solution(s)

• oracle-linux-upgrade-kernel

References

• https://attackerkb.com/topics/cve-2023-52700
• CVE - 2023-52700
• ELSA-2024-4211