NVD

CVE-2022-48785 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use rcu-safe version of ipv6_get_lladdr() Some time ago 8965779d2c0e ("ipv6,mcast: always hold idev->lock before mca_lock") switched ipv6_get_lladdr() to __ipv6_get_lladdr(), which is rcu-unsafe version. That was OK, because idev->lock was held for these codepaths. In 88e2ca308094 ("mld: convert ifmcaddr6 to RCU") these external locks were removed, so we probably need to restore the original rcu-safe call. Otherwise, we occasionally get a machine crashed/stalled with the following in dmesg: [ 3405.966610][T230589] general protection fault, probably for non-canonical address 0xdead00000000008c: 0000 [#1] SMP NOPTI [ 3405.982083][T230589] CPU: 44 PID: 230589 Comm: kworker/44:3 Tainted: G O 5.15.19-cloudflare-2022.2.1 #1 [ 3405.998061][T230589] Hardware name: SUPA-COOL-SERV [ 3406.009552][T230589] Workqueue: mld mld_ifc_work [ 3406.017224][T230589] RIP: 0010:__ipv6_get_lladdr+0x34/0x60 [ 3406.025780][T230589] Code: 57 10 48 83 c7 08 48 89 e5 48 39 d7 74 3e 48 8d 82 38 ff ff ff eb 13 48 8b 90 d0 00 00 00 48 8d 82 38 ff ff ff 48 39 d7 74 22 <66> 83 78 32 20 77 1b 75 e4 89 ca 23 50 2c 75 dd 48 8b 50 08 48 8b [ 3406.055748][T230589] RSP: 0018:ffff94e4b3fc3d10 EFLAGS: 00010202 [ 3406.065617][T230589] RAX: dead00000000005a RBX: ffff94e4b3fc3d30 RCX: 0000000000000040 [ 3406.077477][T230589] RDX: dead000000000122 RSI: ffff94e4b3fc3d30 RDI: ffff8c3a31431008 [ 3406.089389][T230589] RBP: ffff94e4b3fc3d10 R08: 0000000000000000 R09: 0000000000000000 [ 3406.101445][T230589] R10: ffff8c3a31430000 R11: 000000000000000b R12: ffff8c2c37887100 [ 3406.113553][T230589] R13: ffff8c3a39537000 R14: 00000000000005dc R15: ffff8c3a31431000 [ 3406.125730][T230589] FS: 0000000000000000(0000) GS:ffff8c3b9fc80000(0000) knlGS:0000000000000000 [ 3406.138992][T230589] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3406.149895][T230589] CR2: 00007f0dfea1db60 CR3: 000000387b5f2000 CR4: 0000000000350ee0 [ 3406.162421][T230589] Call Trace: [ 3406.170235][T230589] <TASK> [ 3406.177736][T230589] mld_newpack+0xfe/0x1a0 [ 3406.186686][T230589] add_grhead+0x87/0xa0 [ 3406.195498][T230589] add_grec+0x485/0x4e0 [ 3406.204310][T230589] ? newidle_balance+0x126/0x3f0 [ 3406.214024][T230589] mld_ifc_work+0x15d/0x450 [ 3406.223279][T230589] process_one_work+0x1e6/0x380 [ 3406.232982][T230589] worker_thread+0x50/0x3a0 [ 3406.242371][T230589] ? rescuer_thread+0x360/0x360 [ 3406.252175][T230589] kthread+0x127/0x150 [ 3406.261197][T230589] ? set_kthread_struct+0x40/0x40 [ 3406.271287][T230589] ret_from_fork+0x22/0x30 [ 3406.280812][T230589] </TASK> [ 3406.288937][T230589] Modules linked in: ... [last unloaded: kheaders] [ 3406.476714][T230589] ---[ end trace 3525a7655f2f3b9e ]---

Metrics

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:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227	CVE, kernel.org	Patch
https://git.kernel.org/stable/c/27f567c84f446048670376827e356f9c92033bf9	CVE, kernel.org	Patch
https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e	CVE, kernel.org	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-667	Improper Locking	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

CVE Modified by kernel.org 6/17/2026 1:16:11 AM

Action

Type

Old Value

New Value

Added

Affected

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["include/net/addrconf.h","net/ipv6/addrconf.c","net/ipv6/mcast.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"88e2ca3080947fe22eb520c1f8231e79a105d011","lessThan":"3e11ef1903cf6c2fba35594b193a3570854d9e9e","versionType":"git","status":"affected"},{"version":"88e2ca3080947fe22eb520c1f8231e79a105d011","lessThan":"27f567c84f446048670376827e356f9c92033bf9","versionType":"git","status":"affected"},{"version":"88e2ca3080947fe22eb520c1f8231e79a105d011","lessThan":"26394fc118d6115390bd5b3a0fb17096271da227","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["include/net/addrconf.h","net/ipv6/addrconf.c","net/ipv6/mcast.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.13","status":"affected"},{"version":"0","lessThan":"5.13","versionType":"semver","status":"unaffected"},{"version":"5.15.25","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"5.16.11","lessThanOrEqual":"5.16.*","versionType":"semver","status":"unaffected"},{"version":"5.17","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

Initial Analysis by NIST 10/03/2025 10:33:16 AM

Action	Type	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-667
Added	CPE Configuration	OR cpe:2.3:o:linux:linux_kernel:5.17:rc4::::::* cpe:2.3:o:linux:linux_kernel:5.17:rc1::::::* cpe:2.3:o:linux:linux_kernel:5.17:rc2::::::* cpe:2.3:o:linux:linux_kernel:5.17:rc3::::::* cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 5.16 up to (excluding) 5.16.11 cpe:2.3:o:linux:linux_kernel::::::::* versions from (including) 5.13 up to (excluding) 5.15.25
Added	Reference Type	CVE: https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227 Types: Patch
Added	Reference Type	CVE: https://git.kernel.org/stable/c/27f567c84f446048670376827e356f9c92033bf9 Types: Patch
Added	Reference Type	CVE: https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227 Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/27f567c84f446048670376827e356f9c92033bf9 Types: Patch
Added	Reference Type	kernel.org: https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e Types: Patch

New CVE Received from kernel.org 7/16/2024 8:15:03 AM

Action	Type	New Value
Added	Description	Record truncated, showing 2048 of 2791 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: ipv6: mcast: use rcu-safe version of ipv6_get_lladdr() Some time ago 8965779d2c0e ("ipv6,mcast: always hold idev->lock before mca_lock") switched ipv6_get_lladdr() to __ipv6_get_lladdr(), which is rcu-unsafe version. That was OK, because idev->lock was held for these codepaths. In 88e2ca308094 ("mld: convert ifmcaddr6 to RCU") these external locks were removed, so we probably need to restore the original rcu-safe call. Otherwise, we occasionally get a machine crashed/stalled with the following in dmesg: [ 3405.966610][T230589] general protection fault, probably for non-canonical address 0xdead00000000008c: 0000 [#1] SMP NOPTI [ 3405.982083][T230589] CPU: 44 PID: 230589 Comm: kworker/44:3 Tainted: G O 5.15.19-cloudflare-2022.2.1 #1 [ 3405.998061][T230589] Hardware name: SUPA-COOL-SERV [ 3406.009552][T230589] Workqueue: mld mld_ifc_work [ 3406.017224][T230589] RIP: 0010:__ipv6_get_lladdr+0x34/0x60 [ 3406.025780][T230589] Code: 57 10 48 83 c7 08 48 89 e5 48 39 d7 74 3e 48 8d 82 38 ff ff ff eb 13 48 8b 90 d0 00 00 00 48 8d 82 38 ff ff ff 48 39 d7 74 22 <66> 83 78 32 20 77 1b 75 e4 89 ca 23 50 2c 75 dd 48 8b 50 08 48 8b [ 3406.055748][T230589] RSP: 0018:ffff94e4b3fc3d10 EFLAGS: 00010202 [ 3406.065617][T230589] RAX: dead00000000005a RBX: ffff94e4b3fc3d30 RCX: 0000000000000040 [ 3406.077477][T230589] RDX: dead000000000122 RSI: ffff94e4b3fc3d30 RDI: ffff8c3a31431008 [ 3406.089389][T230589] RBP: ffff94e4b3fc3d10 R08: 0000000000000000 R09: 0000000000000000 [ 3406.101445][T230589] R10: ffff8c3a31430000 R11: 000000000000000b R12: ffff8c2c37887100 [ 3406.113553][T230589] R13: ffff8c3a39537000 R14: 00000000000005dc R15: ffff8c3a31431000 [ 3406.125730][T230589] FS: 0000000000000000(0000) GS:ffff8c3b9fc80000(0000) knlGS:0000000000000000 [ 3406.138992][T230589] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3406.149895][T230589] CR2: 00007f0dfea1db60 CR3: 000000387b5f2000 CR4: 0000000000350ee0 [ 3406.162421][T230589] Call Trace: [ 3406.1
Added	Reference	kernel.org https://git.kernel.org/stable/c/26394fc118d6115390bd5b3a0fb17096271da227 [No types assigned]
Added	Reference	kernel.org https://git.kernel.org/stable/c/27f567c84f446048670376827e356f9c92033bf9 [No types assigned]
Added	Reference	kernel.org https://git.kernel.org/stable/c/3e11ef1903cf6c2fba35594b193a3570854d9e9e [No types assigned]

Quick Info

CVE Dictionary Entry:
CVE-2022-48785
NVD Published Date:
07/16/2024
NVD Last Modified:
06/17/2026
Source:
kernel.org

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2022-48785 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CISA-ADP 6/17/2026 1:16:11 AM

CVE Modified by kernel.org 6/17/2026 1:16:11 AM

Initial Analysis by NIST 10/03/2025 10:33:16 AM

CVE Modified by CVE 11/21/2024 2:34:01 AM

New CVE Received from kernel.org 7/16/2024 8:15:03 AM

Quick Info