CVE-2022-49667

Advisory lineage Upstream: 0 Downstream: 9
Analyzed
Published: 26 Feb 2025, 02:24
Last modified:11 May 2026, 19:04

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.02% LOW
0% probability -0.02%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Feb 2025, 02:24
Published
Vulnerability first disclosed
11 May 2026, 19:04
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix use-after-free after 802.3ad slave unbind commit 0622cab0341c ("bonding: fix 802.3ad aggregator reselection"), resolve case, when there is several aggregation groups in the same bond. bond_3ad_unbind_slave will invalidate (clear) aggregator when __agg_active_ports return zero. So, ad_clear_agg can be executed even, when num_of_ports!=0. Than bond_3ad_unbind_slave can be executed again for, previously cleared aggregator. NOTE: at this time bond_3ad_unbind_slave will not update slave ports list, because lag_ports==NULL. So, here we got slave ports, pointing to freed aggregator memory. Fix with checking actual number of ports in group (as was before commit 0622cab0341c ("bonding: fix 802.3ad aggregator reselection") ), before ad_clear_agg(). The KASAN logs are as follows: [ 767.617392] ================================================================== [ 767.630776] BUG: KASAN: use-after-free in bond_3ad_state_machine_handler+0x13dc/0x1470 [ 767.638764] Read of size 2 at addr ffff00011ba9d430 by task kworker/u8:7/767 [ 767.647361] CPU: 3 PID: 767 Comm: kworker/u8:7 Tainted: G O 5.15.11 #15 [ 767.655329] Hardware name: DNI AmazonGo1 A7040 board (DT) [ 767.660760] Workqueue: lacp_1 bond_3ad_state_machine_handler [ 767.666468] Call trace: [ 767.668930] dump_backtrace+0x0/0x2d0 [ 767.672625] show_stack+0x24/0x30 [ 767.675965] dump_stack_lvl+0x68/0x84 [ 767.679659] print_address_description.constprop.0+0x74/0x2b8 [ 767.685451] kasan_report+0x1f0/0x260 [ 767.689148] __asan_load2+0x94/0xd0 [ 767.692667] bond_3ad_state_machine_handler+0x13dc/0x1470

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.02%• Percentile: 4%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • linux•linux

    ≥ 0622cab0341cac6b30da177b0faa39fae0680e71, < a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e | ≥ 0622cab0341cac6b30da177b0faa39fae0680e71, < b90ac60303063a43e17dd4aec159067599d255e6 | ≥ 0622cab0341cac6b30da177b0faa39fae0680e71, < f162f7c348fa2a5555bafdb5cc890b89b221e69c | ≥ 0622cab0341cac6b30da177b0faa39fae0680e71, < 893825289ba840afd86bfffcb6f7f363c73efff8 | ≥ 0622cab0341cac6b30da177b0faa39fae0680e71, < 63b2fe509f69b90168a75e04e14573dccf7984e6 | ≥ 0622cab0341cac6b30da177b0faa39fae0680e71, < ef0af7d08d26c5333ff4944a559279464edf6f15 | ≥ 0622cab0341cac6b30da177b0faa39fae0680e71, < 2765749def4765c5052a4c66445cf4c96fcccdbc | ≥ 0622cab0341cac6b30da177b0faa39fae0680e71, < 050133e1aa2cb49bb17be847d48a4431598ef562 | 4.7

  • linux•linux_kernel

    ≥ 4.7, < 4.9.322 | ≥ 4.10, < 4.14.287 | ≥ 4.15, < 4.19.251 | ≥ 4.20, < 5.4.204 | ≥ 5.5, < 5.10.129 | ≥ 5.11, < 5.15.53 | ≥ 5.16, < 5.18.10 | 5.19:rc1 | 5.19:rc2 | 5.19:rc3 | 5.19:rc4

References (8)