CVE-2024-39490: Linux kernel · ipv6: sr: fix missing sk_buff release in seg6_input_core
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 6.2 Medium · fixed in 5.15.0-1069.75~20.04.1 : update Linux kernel when convenient.
Data as of 28 Oct 2026, 11:02 UTC
- Patch
- Available – fixed in 5.15.0-1069.75~20.04.1, 5.15.0-1072.81~20.04.1, 5.15.0-1068.76~20.04.1 +48
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 10 Jul 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Patches and advisories
- ubuntu.com/security/notices/USN-6999-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7004-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7005-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7007-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7008-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7005-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7009-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7019-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7007-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6999-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7007-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7029-1 (opens in a new tab)
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 24.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSlinux-ibmpkg:deb/ubuntu/linux-ibm?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and has been released in multiple Linux kernel versions (5.15.0-1052.59~20.04.1 and later). Users should update to these fixed versions to remediate the vulnerability. No additional mitigation steps are required beyond applying the official kernel updates.
Description
CVE-2024-39490 is a vulnerability in the Linux kernel's IPv6 Segment Routing (SR) implementation. It involves a missing release of the sk_buff buffer in the seg6_input_core function when skb_cow_head() fails, causing a memory leak. This flaw was introduced in a prior commit and persisted through subsequent code refactoring. The issue has been fixed in multiple patched Linux kernel versions.
References
- ubuntu.com/security/CVE-2024-39490 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2024-39490 (opens in a new tab)
- git.kernel.org/linus/5447f9708d9e4c17a647b16a9cb29e9e02820bd9 (opens in a new tab)
- git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7a (opens in a new tab)
- git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864 (opens in a new tab)
- git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8 (opens in a new tab)
- git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940 (opens in a new tab)
- git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9 (opens in a new tab)
- ubuntu.com/security/notices/USN-6999-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7004-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7005-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7007-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7008-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7005-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7009-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7019-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7007-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-6999-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7007-3 (opens in a new tab)
- ubuntu.com/security/notices/USN-7029-1 (opens in a new tab)