CVE-2024-39490ipv6: sr: fix missing sk_buff release in seg6_input_core
- 6.2MediumCVSS base score
- 0.22%Exploitation in 30 daysEPSS · top 87% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 22 months later
· 22 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Analyzed | 3.1 | Medium6.2 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.22% · top 87% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.2.
Affected products
- affected af3b5158b89d3bab9be881113417558c71b71ca4 – < e8688218e38111ace457509d8f0cad75f79c1a7a
- affected af3b5158b89d3bab9be881113417558c71b71ca4 – < 8f1fc3b86eaea70be6abcae2e9aa7e7b99453864
- affected af3b5158b89d3bab9be881113417558c71b71ca4 – < f4df8c7670a73752201cbde215254598efdf6ce8
- affected af3b5158b89d3bab9be881113417558c71b71ca4 – < f5fec1588642e415a3d72e02140160661b303940
- affected af3b5158b89d3bab9be881113417558c71b71ca4 – < 5447f9708d9e4c17a647b16a9cb29e9e02820bd9
- affected 4.12
- unaffected < 4.12
- unaffected 5.15.161 – ≤ 5.15.*
- unaffected 6.1.93 – ≤ 6.1.*
- unaffected 6.6.33 – ≤ 6.6.*
- unaffected 6.9.4 – ≤ 6.9.*
- unaffected 6.10 – ≤ *
References
References5
- https://git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7a (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2024-38327 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2024-39490)Record last updated .