CVE-2024-41091

Summary

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

tun: add missing verification for short frame

The cited commit missed to check against the validity of the frame length in the tun_xdp_one() path, which could cause a corrupted skb to be sent downstack. Even before the skb is transmitted, the tun_xdp_one–>eth_type_trans() may access the Ethernet header although it can be less than ETH_HLEN. Once transmitted, this could either cause out-of-bound access beyond the actual length, or confuse the underlayer with incorrect or inconsistent header length in the skb metadata.

In the alternative path, tun_get_user() already prohibits short frame which has the length less than Ethernet header size from being transmitted for IFF_TAP.

This is to drop any frame shorter than the Ethernet header size just like how tun_get_user() does.

CVE: CVE-2024-41091

Affected Software

VendorProductVersion RangeStatus
LinuxLinux043d222f93ab8c76b56a3b315cd8692e35affb6c < 32b0aaba5dbc85816898167d9b5d45a22eae82e9affected
LinuxLinux043d222f93ab8c76b56a3b315cd8692e35affb6c < 6100e0237204890269e3f934acfc50d35fd6f319affected
LinuxLinux043d222f93ab8c76b56a3b315cd8692e35affb6c < 589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2affected
LinuxLinux043d222f93ab8c76b56a3b315cd8692e35affb6c < ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146affected
LinuxLinux043d222f93ab8c76b56a3b315cd8692e35affb6c < d5ad89b7d01ed4e66fd04734fc63d6e78536692aaffected
LinuxLinux043d222f93ab8c76b56a3b315cd8692e35affb6c < a9d1c27e2ee3b0ea5d40c105d6e728fc114470bbaffected
LinuxLinux043d222f93ab8c76b56a3b315cd8692e35affb6c < 8418f55302fa1d2eeb73e16e345167e545c598a5affected
LinuxLinux043d222f93ab8c76b56a3b315cd8692e35affb6c < 049584807f1d797fc3078b68035450a9769eb5c3affected
LinuxLinux4.20affected
LinuxLinux0 < 4.20unaffected
LinuxLinux5.4.281 <= 5.4.*unaffected
LinuxLinux5.10.223 <= 5.10.*unaffected
LinuxLinux5.15.164 <= 5.15.*unaffected
LinuxLinux6.1.102 <= 6.1.*unaffected
LinuxLinux6.6.43 <= 6.6.*unaffected
LinuxLinux6.9.12 <= 6.9.*unaffected
LinuxLinux6.10.2 <= 6.10.*unaffected
LinuxLinux6.11 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References