Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2024-47713

Disclosure Date: October 21, 2024 •
CVE-2024-47713 CVSS v3 Base Score: 5.5
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: use two-phase skb reclamation in ieee80211_do_stop()

Since ‘__dev_queue_xmit()’ should be called with interrupts enabled,
the following backtrace:

ieee80211_do_stop()
…
spin_lock_irqsave(&local->queue_stop_reason_lock, flags)
…
ieee80211_free_txskb()
ieee80211_report_used_skb()
ieee80211_report_ack_skb()

cfg80211_mgmt_tx_status_ext()
 nl80211_frame_tx_status()
  genlmsg_multicast_netns()
   genlmsg_multicast_netns_filtered()
    nlmsg_multicast_filtered()
 netlink_broadcast_filtered()
  do_one_broadcast()
   netlink_broadcast_deliver()
    __netlink_sendskb()
     netlink_deliver_tap()
      __netlink_deliver_tap_skb()
       dev_queue_xmit()
        __dev_queue_xmit() ; with IRQS disabled

…
spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags)

issues the warning (as reported by syzbot reproducer):

WARNING: CPU: 2 PID: 5128 at kernel/softirq.c:362 __local_bh_enable_ip+0xc3/0x120

Fix this by implementing a two-phase skb reclamation in
‘ieee80211_do_stop()’, where actual work is performed
outside of a section with interrupts disabled.

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CVSS V3 Severity and Metrics
Base Score:
5.5 Medium
Impact Score:
3.6
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Linux 07eb0bd7b0a8
Linux not down converted
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • linux

Products

  • linux kernel
Technical Analysis