#VU104459 Use-after-free in Linux kernel - CVE-2022-49328
Vulnerability identifier: #VU104459
Vulnerability risk: Low
CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2022-49328
CWE-ID:
CWE-416
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the mt76_txq_stopped() and mt76_txq_schedule_list() functions in drivers/net/wireless/mediatek/mt76/tx.c, within the mt7921_add_interface() function in drivers/net/wireless/mediatek/mt76/mt7921/main.c, within the mt7915_add_interface() function in drivers/net/wireless/mediatek/mt76/mt7915/main.c, within the mt76x02_vif_init() and mt76x02_remove_interface() functions in drivers/net/wireless/mediatek/mt76/mt76x02_util.c, within the mt7615_add_interface() function in drivers/net/wireless/mediatek/mt76/mt7615/main.c, within the mt7603_add_interface() function in drivers/net/wireless/mediatek/mt76/mt7603/main.c, within the mt76_sta_add() function in drivers/net/wireless/mediatek/mt76/mac80211.c. A local user can escalate privileges on the system.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 5.17, 5.17 rc1, 5.17 rc2, 5.17 rc3, 5.17 rc4, 5.17 rc5, 5.17 rc6, 5.17 rc7, 5.17 rc8, 5.17 rc9, 5.17 rc12, 5.17.1, 5.17.2, 5.17.3, 5.17.4, 5.17.5, 5.17.6, 5.17.7, 5.17.8, 5.17.9, 5.17.10, 5.17.11, 5.17.12, 5.17.13
External links
https://git.kernel.org/stable/c/4448327b41738dbfcda680eb4935ff835568f468
https://git.kernel.org/stable/c/51fb1278aa57ae0fc54adaa786e1965362bed4fb
https://git.kernel.org/stable/c/d5f77f1dbb59feae81f88e44551e8e1d8a802d9a
https://git.kernel.org/stable/c/e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.14
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
