Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent NULL dereference in ip6_output() According to syzbot, there is a chance that ip6_dst_idev() returns NULL in ip6_output(). Most places in IPv6 stack deal with a NULL idev just fine, but not here. syzbot reported: general protection fault, probably for non-canonical address 0xdffffc00000000bc: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000005e0-0x00000000000005e7] CPU: 0 PID: 9775 Comm: syz-executor.4 Not tainted 6.9.0-rc5-syzkaller-00157-g6a30653b604a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:ip6_output+0x231/0x3f0 net/ipv6/ip6_output.c:237 Code: 3c 1e 00 49 89 df 74 08 4c 89 ef e8 19 58 db f7 48 8b 44 24 20 49 89 45 00 49 89 c5 48 8d 9d e0 05 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 4c 8b 74 24 28 0f 85 61 01 00 00 8b 1b 31 ff RSP: 0018:ffffc9000927f0d8 EFLAGS: 00010202 RAX: 00000000000000bc RBX: 00000000000005e0 RCX: 0000000000040000 RDX: ffffc900131f9000 RSI: 0000000000004f47 RDI: 0000000000004f48 RBP: 0000000000000000 R08: ffffffff8a1f0b9a R09: 1ffffffff1f51fad R10: dffffc0000000000 R11: fffffbfff1f51fae R12: ffff8880293ec8c0 R13: ffff88805d7fc000 R14: 1ffff1100527d91a R15: dffffc0000000000 FS: 00007f135c6856c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000080 CR3: 0000000064096000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> NF_HOOK include/linux/netfilter.h:314 [inline] ip6_xmit+0xefe/0x17f0 net/ipv6/ip6_output.c:358 sctp_v6_xmit+0x9f2/0x13f0 net/sctp/ipv6.c:248 sctp_packet_transmit+0x26ad/0x2ca0 net/sctp/output.c:653 sctp_packet_singleton+0x22c/0x320 net/sctp/outqueue.c:783 sctp_outq_flush_ctrl net/sctp/outqueue.c:914 [inline] sctp_outq_flush+0x6d5/0x3e20 net/sctp/outqueue.c:1212 sctp_side_effects net/sctp/sm_sideeffect.c:1198 [inline] sctp_do_sm+0x59cc/0x60c0 net/sctp/sm_sideeffect.c:1169 sctp_primitive_ASSOCIATE+0x95/0xc0 net/sctp/primitive.c:73 __sctp_connect+0x9cd/0xe30 net/sctp/socket.c:1234 sctp_connect net/sctp/socket.c:4819 [inline] sctp_inet_connect+0x149/0x1f0 net/sctp/socket.c:4834 __sys_connect_file net/socket.c:2048 [inline] __sys_connect+0x2df/0x310 net/socket.c:2065 __do_sys_connect net/socket.c:2075 [inline] __se_sys_connect net/socket.c:2072 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2072 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f

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/2272e2db38f2e85929278146d7c770f22f528579
https://git.kernel.org/stable/c/4db783d68b9b39a411a96096c10828ff5dfada7a	Patch
https://git.kernel.org/stable/c/55f7eb4001ef2a3b48cf039cf263f9ed0ec5a488	Patch
https://git.kernel.org/stable/c/9df3b2474a627994433a87cbf325a562555b17de
https://git.kernel.org/stable/c/e31b25cc2066d3f2b6c38579253882008d4469b0	Patch
https://git.kernel.org/stable/c/ea0cb87402f774b0e1214ffba0f57028b27cf155	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-476	NULL Pointer Dereference	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

CVE Modified by kernel.org 7/18/2024 8:15:03 AM

Action	Type	Old Value	New Value
Added	Reference		kernel.org https://git.kernel.org/stable/c/2272e2db38f2e85929278146d7c770f22f528579 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/9df3b2474a627994433a87cbf325a562555b17de [No types assigned]

Initial Analysis by NIST 6/10/2024 3:21:15 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 2.6.27 up to (excluding) 6.1.91 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.31 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.8.10
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CWE		NIST CWE-476
Changed	Reference Type	https://git.kernel.org/stable/c/4db783d68b9b39a411a96096c10828ff5dfada7a No Types Assigned	https://git.kernel.org/stable/c/4db783d68b9b39a411a96096c10828ff5dfada7a Patch
Changed	Reference Type	https://git.kernel.org/stable/c/55f7eb4001ef2a3b48cf039cf263f9ed0ec5a488 No Types Assigned	https://git.kernel.org/stable/c/55f7eb4001ef2a3b48cf039cf263f9ed0ec5a488 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/e31b25cc2066d3f2b6c38579253882008d4469b0 No Types Assigned	https://git.kernel.org/stable/c/e31b25cc2066d3f2b6c38579253882008d4469b0 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/ea0cb87402f774b0e1214ffba0f57028b27cf155 No Types Assigned	https://git.kernel.org/stable/c/ea0cb87402f774b0e1214ffba0f57028b27cf155 Patch

New CVE Received by NIST 5/30/2024 12:15:13 PM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 2735 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: ipv6: prevent NULL dereference in ip6_output() According to syzbot, there is a chance that ip6_dst_idev() returns NULL in ip6_output(). Most places in IPv6 stack deal with a NULL idev just fine, but not here. syzbot reported: general protection fault, probably for non-canonical address 0xdffffc00000000bc: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000005e0-0x00000000000005e7] CPU: 0 PID: 9775 C
Added	Reference		kernel.org https://git.kernel.org/stable/c/4db783d68b9b39a411a96096c10828ff5dfada7a [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/55f7eb4001ef2a3b48cf039cf263f9ed0ec5a488 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/e31b25cc2066d3f2b6c38579253882008d4469b0 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/ea0cb87402f774b0e1214ffba0f57028b27cf155 [No types assigned]