CVE-2024-41005

Summary

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

netpoll: Fix race condition in netpoll_owner_active

KCSAN detected a race condition in netpoll:

BUG: KCSAN: data-race in net_rx_action / netpoll_send_skb
write (marked) to 0xffff8881164168b0 of 4 bytes by interrupt on cpu 10:
net_rx_action (./include/linux/netpoll.h:90 net/core/dev.c:6712 net/core/dev.c:6822)

<snip> read to 0xffff8881164168b0 of 4 bytes by task 1 on cpu 2: netpoll_send_skb (net/core/netpoll.c:319 net/core/netpoll.c:345 net/core/netpoll.c:393) netpoll_send_udp (net/core/netpoll.c:?) <snip> value changed: 0x0000000a -> 0xffffffff

This happens because netpoll_owner_active() needs to check if the current CPU is the owner of the lock, touching napi->poll_owner non atomically. The ->poll_owner field contains the current CPU holding the lock.

Use an atomic read to check if the poll owner is the current CPU.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux89c4b442b78bdba388337cc746fe63caba85f46c < 43c0ca793a18578a0f5b305dd77fcf7ed99f1265affected
LinuxLinux89c4b442b78bdba388337cc746fe63caba85f46c < efd29cd9c7b8369dfc7bcb34637e6bf1a188aa8eaffected
LinuxLinux89c4b442b78bdba388337cc746fe63caba85f46c < 96826b16ef9c6568d31a1f6ceaa266411a46e46caffected
LinuxLinux89c4b442b78bdba388337cc746fe63caba85f46c < 3f1a155950a1685ffd0fd7175b3f671da8771f3daffected
LinuxLinux89c4b442b78bdba388337cc746fe63caba85f46c < a130e7da73ae93afdb4659842267eec734ffbd57affected
LinuxLinux89c4b442b78bdba388337cc746fe63caba85f46c < c2e6a872bde9912f1a7579639c5ca3adf1003916affected
LinuxLinux4.10affected
LinuxLinux0 < 4.10unaffected
LinuxLinux5.10.221 <= 5.10.*unaffected
LinuxLinux5.15.162 <= 5.15.*unaffected
LinuxLinux6.1.96 <= 6.1.*unaffected
LinuxLinux6.6.36 <= 6.6.*unaffected
LinuxLinux6.9.7 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

Additional References

References