CVE-2024-39490
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().
Does this matter?
Lower severity and a low EPSS score (0.22%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.2 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.22% probability · 13th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9Patch
- https://git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864Patch
- https://git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7aPatch
- https://git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8Patch
- https://git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940Patch
- https://git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9Patch
- https://git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864Patch
- https://git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7aPatch
- https://git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8Patch
- https://git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.