CVE-2022-49667
net: bonding: fix use-after-free after 802.3ad slave unbind
- Published
- Updated
- Reserved
- Assigned by
- Linux
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
Timeline
ID reserved
By Linux
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.29% · top 78% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 0622cab0341cac6b30da177b0faa39fae0680e71 – < a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e
- affected 0622cab0341cac6b30da177b0faa39fae0680e71 – < b90ac60303063a43e17dd4aec159067599d255e6
- affected 0622cab0341cac6b30da177b0faa39fae0680e71 – < f162f7c348fa2a5555bafdb5cc890b89b221e69c
- affected 0622cab0341cac6b30da177b0faa39fae0680e71 – < 893825289ba840afd86bfffcb6f7f363c73efff8
- affected 0622cab0341cac6b30da177b0faa39fae0680e71 – < 63b2fe509f69b90168a75e04e14573dccf7984e6
- affected 0622cab0341cac6b30da177b0faa39fae0680e71 – < ef0af7d08d26c5333ff4944a559279464edf6f15
- affected 0622cab0341cac6b30da177b0faa39fae0680e71 – < 2765749def4765c5052a4c66445cf4c96fcccdbc
- affected 0622cab0341cac6b30da177b0faa39fae0680e71 – < 050133e1aa2cb49bb17be847d48a4431598ef562
- affected 4.7
- unaffected < 4.7
- unaffected 4.9.322 – ≤ 4.9.*
- unaffected 4.14.287 – ≤ 4.14.*
- unaffected 4.19.251 – ≤ 4.19.*
- unaffected 5.4.204 – ≤ 5.4.*
- unaffected 5.10.129 – ≤ 5.10.*
- unaffected 5.15.53 – ≤ 5.15.*
- unaffected 5.18.10 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (8)
- https://git.kernel.org/stable/c/a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e (opens in a new tab)
- https://git.kernel.org/stable/c/b90ac60303063a43e17dd4aec159067599d255e6 (opens in a new tab)
- https://git.kernel.org/stable/c/f162f7c348fa2a5555bafdb5cc890b89b221e69c (opens in a new tab)
- https://git.kernel.org/stable/c/893825289ba840afd86bfffcb6f7f363c73efff8 (opens in a new tab)
- https://git.kernel.org/stable/c/63b2fe509f69b90168a75e04e14573dccf7984e6 (opens in a new tab)
- https://git.kernel.org/stable/c/ef0af7d08d26c5333ff4944a559279464edf6f15 (opens in a new tab)
- https://git.kernel.org/stable/c/2765749def4765c5052a4c66445cf4c96fcccdbc (opens in a new tab)
- https://git.kernel.org/stable/c/050133e1aa2cb49bb17be847d48a4431598ef562 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-49667)Record last updated .