CVE-2024-39490 (GCVE-0-2024-39490)

Vulnerability from cvelistv5 – Published: 2024-07-10 07:14 – Updated: 2026-05-11 20:21
VLAI
Title
ipv6: sr: fix missing sk_buff release in seg6_input_core
Summary
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.
Severity
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: af3b5158b89d3bab9be881113417558c71b71ca4 , < e8688218e38111ace457509d8f0cad75f79c1a7a (git)
Affected: af3b5158b89d3bab9be881113417558c71b71ca4 , < 8f1fc3b86eaea70be6abcae2e9aa7e7b99453864 (git)
Affected: af3b5158b89d3bab9be881113417558c71b71ca4 , < f4df8c7670a73752201cbde215254598efdf6ce8 (git)
Affected: af3b5158b89d3bab9be881113417558c71b71ca4 , < f5fec1588642e415a3d72e02140160661b303940 (git)
Affected: af3b5158b89d3bab9be881113417558c71b71ca4 , < 5447f9708d9e4c17a647b16a9cb29e9e02820bd9 (git)
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Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 5.15.161 , ≤ 5.15.* (semver)
Unaffected: 6.1.93 , ≤ 6.1.* (semver)
Unaffected: 6.6.33 , ≤ 6.6.* (semver)
Unaffected: 6.9.4 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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      "cveMetadata": "{\"cveId\": \"CVE-2024-39490\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:16:54.371Z\", \"dateReserved\": \"2024-06-25T14:23:23.747Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-10T07:14:09.667Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.