{"id":"CVE-2026-23399","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnf_tables: nft_dynset: fix possible stateful expression memleak in error path\n\nIf cloning the second stateful expression in the element via GFP_ATOMIC\nfails, then the f…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnf_tables: nft_dynset: fix possible stateful expression memleak in error path\n\nIf cloning the second stateful expression in the element via GFP_ATOMIC\nfails, then the f…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.11.1, < 6.12.78","linux_kernel >= 6.13, < 6.18.20","linux_kernel >= 6.19, < 6.19.10","linux_kernel = 5.11","linux_kernel = 7.0"],"patched":["linux_kernel 6.19.10"],"published":"2026-03-28","updated":"2026-09-08","sourceUpdated":"2026-09-08T09:17:49.613","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-23399","references":[{"url":"https://git.kernel.org/stable/c/0548a13b5a145b16e4da0628b5936baf35f51b43","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/31641c682db73353e4647e40735c7f2a75ff58ef","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4357dbb1d9c35ca0b4443d71c98a48e6666f7689","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c88a9fd26cee365bec932196f76175772a941cca","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d1354873cbe3b344899c4311ac05897fd83e3f21","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e6661add2d9c6913e1dad97336595e23a2bed195","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eb7bf413e59945df03d4567b73ce464eebe2f4ea","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00121,"epssPercentile":0.02199,"ingestedAt":"2026-09-08T09:30:08.336Z","slug":"CVE-2026-23399","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnf_tables: nft_dynset: fix possible stateful expression memleak in error path\n\nIf cloning the second stateful expression in the element via GFP_ATOMIC\nfails, then the first stateful expression remains in place without being\nreleased.\n\n   unreferenced object (percpu) 0x607b97e9cab8 (size 16):\n     comm \"softirq\", pid 0, jiffies 4294931867\n     hex dump (first 16 bytes on cpu 3):\n       00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n     backtrace (crc 0):\n       pcpu_alloc_noprof+0x453/0xd80\n       nft_counter_clone+0x9c/0x190 [nf_tables]\n       nft_expr_clone+0x8f/0x1b0 [nf_tables]\n       nft_dynset_new+0x2cb/0x5f0 [nf_tables]\n       nft_rhash_update+0x236/0x11c0 [nf_tables]\n       nft_dynset_eval+0x11f/0x670 [nf_tables]\n       nft_do_chain+0x253/0x1700 [nf_tables]\n       nft_do_chain_ipv4+0x18d/0x270 [nf_tables]\n       nf_hook_slow+0xaa/0x1e0\n       ip_local_deliver+0x209/0x330\n\n## Affected\n\n- `linux_kernel >= 5.11.1, < 6.12.78`\n- `linux_kernel >= 6.13, < 6.18.20`\n- `linux_kernel >= 6.19, < 6.19.10`\n- `linux_kernel = 5.11`\n- `linux_kernel = 7.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.19.10`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}