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redhatcveRedhat.comRH:CVE-2024-39490
HistoryJul 10, 2024 - 11:07 a.m.

CVE-2024-39490

2024-07-1011:07:23
redhat.com
access.redhat.com
4
linux kernel
cve-2024-39490
vulnerability
seg6_input_core
memory leak
sk_buff

AI Score

7

Confidence

Low

In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: fix missing sk_buff release in seg6_input_core The seg6_input() function is responsible for adding the SRH into a packet, delegating the operation to the seg6_input_core(). This function uses the skb_cow_head() to ensure that there is sufficient headroom in the sk_buff for accommodating the link-layer header. In the event that the skb_cow_header() function fails, the seg6_input_core() catches the error but it does not release the sk_buff, which will result in a memory leak. This issue was introduced in commit af3b5158b89d (“ipv6: sr: fix BUG due to headroom too small after SRH push”) and persists even after commit 7a3f5b0de364 (“netfilter: add netfilter hooks to SRv6 data plane”), where the entire seg6_input() code was refactored to deal with netfilter hooks. The proposed patch addresses the identified memory leak by requiring the seg6_input_core() function to release the sk_buff in the event that skb_cow_head() fails.

AI Score

7

Confidence

Low