Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: validate inner IPv4 header length in IPTFS payload Add validation of the inner IPv4 packet tot_len and ihl fields parsed from decrypted IPTFS payloads in __input_process_payload(). A crafted ESP packet containing an inner IPv4 header with tot_len=0 causes an infinite loop: iplen=0 leads to capturelen=min(0, remaining)=0, so the data offset never advances and the while(data < tail) loop never terminates, spinning forever in softirq context. Reject inner IPv4 packets where tot_len < ihl*4 or ihl*4 < sizeof(struct iphdr), which catches both the tot_len=0 case and malformed ihl values. The normal IP stack performs this validation in ip_rcv_core(), but IPTFS extracts and processes inner packets before they reach that layer.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 6c82d2433671819a550227bf65bfb6043e3d3305 before de6d8e8ce5187f7402c9859b443355e7120c5f09; affected 6c82d2433671819a550227bf65bfb6043e3d3305 before 3db7d4f777a00164582061ccaa99569cd85011a3; affected 6c82d2433671819a550227bf65bfb6043e3d3305 before 0d10393d5eac33cbd92f7a41fddca12c41d3cb7e |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.18.21 through 6.18.*; unaffected 6.19.11 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.