CVE-2024-39490

MEDIUM EPSS 12.7%
Published Jul 10, 20241y ago · Modified Jun 17, 20261w ago
6.2 CVSS 3.1
Medium
Find Similar
Published Jul 10, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
6.2
Exploitability
2.5
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
12.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥4.12  –  <5.15.161
linuxlinux_kernel*≥5.16  –  <6.1.93
linuxlinux_kernel*≥6.2  –  <6.6.33
linuxlinux_kernel*≥6.7  –  <6.9.4

References 5

  • git.kernel.org https://git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940
    Patch