Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix signed integer overflow in __ip6_append_data Resurrect ubsan overflow checks and ubsan report this warning, fix it by change the variable [length] type to size_t. UBSAN: signed-integer-overflow in net/ipv6/ip6_output.c:1489:19 2147479552 + 8567 cannot be represented in type 'int' CPU: 0 PID: 253 Comm: err Not tainted 5.16.0+ #1 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace+0x214/0x230 show_stack+0x30/0x78 dump_stack_lvl+0xf8/0x118 dump_stack+0x18/0x30 ubsan_epilogue+0x18/0x60 handle_overflow+0xd0/0xf0 __ubsan_handle_add_overflow+0x34/0x44 __ip6_append_data.isra.48+0x1598/0x1688 ip6_append_data+0x128/0x260 udpv6_sendmsg+0x680/0xdd0 inet6_sendmsg+0x54/0x90 sock_sendmsg+0x70/0x88 ____sys_sendmsg+0xe8/0x368 ___sys_sendmsg+0x98/0xe0 __sys_sendmmsg+0xf4/0x3b8 __arm64_sys_sendmmsg+0x34/0x48 invoke_syscall+0x64/0x160 el0_svc_common.constprop.4+0x124/0x300 do_el0_svc+0x44/0xc8 el0_svc+0x3c/0x1e8 el0t_64_sync_handler+0x88/0xb0 el0t_64_sync+0x16c/0x170 Changes since v1: -Change the variable [length] type to unsigned, as Eric Dumazet suggested. Changes since v2: -Don't change exthdrlen type in ip6_make_skb, as Paolo Abeni suggested. Changes since v3: -Don't change ulen type in udpv6_sendmsg and l2tp_ip6_sendmsg, as Jakub Kicinski suggested.

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  5.5 MEDIUM

Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://git.kernel.org/stable/c/70549c80fe80ac4e2a22068c76ebebced24f7e74
https://git.kernel.org/stable/c/84dc940890e91e42898e4443a093281702440abf	Patch
https://git.kernel.org/stable/c/f26422eabeb517629568edf8c2dd9c6cb9147584
https://git.kernel.org/stable/c/f93431c86b631bbca5614c66f966bf3ddb3c2803	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-190	Integer Overflow or Wraparound	NIST

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Change History

3 change records found show changes

CVE Modified by kernel.org 4/10/2025 9:15:43 AM

Action	Type	Old Value	New Value
Added	Reference		https://git.kernel.org/stable/c/70549c80fe80ac4e2a22068c76ebebced24f7e74
Added	Reference		https://git.kernel.org/stable/c/f26422eabeb517629568edf8c2dd9c6cb9147584

Initial Analysis by NIST 3/07/2025 3:46:17 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CWE		CWE-190
Added	CPE Configuration		OR *cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (excluding) 5.18.6
Added	Reference Type		kernel.org: https://git.kernel.org/stable/c/84dc940890e91e42898e4443a093281702440abf Types: Patch
Added	Reference Type		kernel.org: https://git.kernel.org/stable/c/f93431c86b631bbca5614c66f966bf3ddb3c2803 Types: Patch

New CVE Received from kernel.org 2/26/2025 2:01:48 AM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 1392 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix signed integer overflow in __ip6_append_data Resurrect ubsan overflow checks and ubsan report this warning, fix it by change the variable [length] type to size_t. UBSAN: signed-integer-overflow in net/ipv6/ip6_output.c:1489:19 2147479552 + 8567 cannot be represented in type 'int' CPU: 0 PID: 253 Comm: err Not tainted 5.16.0+ #1 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace+0x214/0x230 show_stac
Added	Reference		https://git.kernel.org/stable/c/84dc940890e91e42898e4443a093281702440abf
Added	Reference		https://git.kernel.org/stable/c/f93431c86b631bbca5614c66f966bf3ddb3c2803