{"id":"CVE-2024-39490","state":"PUBLISHED","title":"ipv6: sr: fix missing sk_buff release in seg6_input_core","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: sr: fix missing sk_buff release in seg6_input_core\n\nThe seg6_input() function is responsible for adding the SRH into a\npacket, delegating the operation to the seg6_input_core(). This function\nuses the skb_cow_head() to ensure that there is sufficient headroom in\nthe sk_buff for accommodating the link-layer header.\nIn the event that the skb_cow_header() function fails, the\nseg6_input_core() catches the error but it does not release the sk_buff,\nwhich will result in a memory leak.\n\nThis issue was introduced in commit af3b5158b89d (\"ipv6: sr: fix BUG due\nto headroom too small after SRH push\") and persists even after commit\n7a3f5b0de364 (\"netfilter: add netfilter hooks to SRv6 data plane\"),\nwhere the entire seg6_input() code was refactored to deal with netfilter\nhooks.\n\nThe proposed patch addresses the identified memory leak by requiring the\nseg6_input_core() function to release the sk_buff in the event that\nskb_cow_head() fails.","publishedAt":"2024-07-10T07:14:09.667Z","updatedAt":"2026-05-11T20:21:34.024Z","severity":{"score":6.2,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"af3b5158b89d3bab9be881113417558c71b71ca4","status":"affected","lessThan":"e8688218e38111ace457509d8f0cad75f79c1a7a","versionType":"git"},{"version":"af3b5158b89d3bab9be881113417558c71b71ca4","status":"affected","lessThan":"8f1fc3b86eaea70be6abcae2e9aa7e7b99453864","versionType":"git"},{"version":"af3b5158b89d3bab9be881113417558c71b71ca4","status":"affected","lessThan":"f4df8c7670a73752201cbde215254598efdf6ce8","versionType":"git"},{"version":"af3b5158b89d3bab9be881113417558c71b71ca4","status":"affected","lessThan":"f5fec1588642e415a3d72e02140160661b303940","versionType":"git"},{"version":"af3b5158b89d3bab9be881113417558c71b71ca4","status":"affected","lessThan":"5447f9708d9e4c17a647b16a9cb29e9e02820bd9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/seg6_iptunnel.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"5.15.161","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.93","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.33","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.9.4","status":"unaffected","lessThanOrEqual":"6.9.*","versionType":"semver"},{"version":"6.10","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/seg6_iptunnel.c"]}],"references":["https://git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7a","https://git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864","https://git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8","https://git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940","https://git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9"],"weaknesses":["CWE-401"],"ingestedAt":"2026-10-29T20:07:39.287Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/39xxx/CVE-2024-39490.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-39490","state":"PUBLISHED","datePublished":"2024-07-10T07:14:09.667Z","dateUpdated":"2026-05-11T20:21:34.024Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-06-25T14:23:23.747Z"},"containers":{"cna":{"title":"ipv6: sr: fix missing sk_buff release in seg6_input_core","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: sr: fix missing sk_buff release in seg6_input_core\n\nThe seg6_input() function is responsible for adding the SRH into a\npacket, delegating the operation to the seg6_input_core(). This function\nuses the skb_cow_head() to ensure that there is sufficient headroom in\nthe sk_buff for accommodating the link-layer header.\nIn the event that the skb_cow_header() function fails, the\nseg6_input_core() catches the error but it does not release the sk_buff,\nwhich will result in a memory leak.\n\nThis issue was introduced in commit af3b5158b89d (\"ipv6: sr: fix BUG due\nto headroom too small after SRH push\") and persists even after commit\n7a3f5b0de364 (\"netfilter: add netfilter hooks to SRv6 data plane\"),\nwhere the entire seg6_input() code was refactored to deal with netfilter\nhooks.\n\nThe proposed patch addresses the identified memory leak by requiring the\nseg6_input_core() function to release the sk_buff in the event that\nskb_cow_head() fails."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"af3b5158b89d3bab9be881113417558c71b71ca4","status":"affected","lessThan":"e8688218e38111ace457509d8f0cad75f79c1a7a","versionType":"git"},{"version":"af3b5158b89d3bab9be881113417558c71b71ca4","status":"affected","lessThan":"8f1fc3b86eaea70be6abcae2e9aa7e7b99453864","versionType":"git"},{"version":"af3b5158b89d3bab9be881113417558c71b71ca4","status":"affected","lessThan":"f4df8c7670a73752201cbde215254598efdf6ce8","versionType":"git"},{"version":"af3b5158b89d3bab9be881113417558c71b71ca4","status":"affected","lessThan":"f5fec1588642e415a3d72e02140160661b303940","versionType":"git"},{"version":"af3b5158b89d3bab9be881113417558c71b71ca4","status":"affected","lessThan":"5447f9708d9e4c17a647b16a9cb29e9e02820bd9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/seg6_iptunnel.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.12","versionType":"semver"},{"version":"5.15.161","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.93","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.33","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.9.4","status":"unaffected","lessThanOrEqual":"6.9.*","versionType":"semver"},{"version":"6.10","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv6/seg6_iptunnel.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e8688218e38111ace457509d8f0cad75f79c1a7a"},{"url":"https://git.kernel.org/stable/c/8f1fc3b86eaea70be6abcae2e9aa7e7b99453864"},{"url":"https://git.kernel.org/stable/c/f4df8c7670a73752201cbde215254598efdf6ce8"},{"url":"https://git.kernel.org/stable/c/f5fec1588642e415a3d72e02140160661b303940"},{"url":"https://git.kernel.org/stable/c/5447f9708d9e4c17a647b16a9cb29e9e02820bd9"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:21:34.024Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"5.15.161"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.1.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.6.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.9.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.12","versionEndExcluding":"6.10"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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