{"id":"CVE-2026-23019","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix NULL dereference on devlink_alloc() failure\n\ndevlink_alloc() may return NULL on allocation failure, but\nprestera_devlink_alloc() uncondition…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix NULL dereference on devlink_alloc() failure\n\ndevlink_alloc() may return NULL on allocation failure, but\nprestera_devlink_alloc() uncondition…","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-476"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.10.1, < 5.15.198","linux_kernel >= 5.16, < 6.1.161","linux_kernel >= 6.2, < 6.6.121","linux_kernel >= 6.7, < 6.12.66","linux_kernel >= 6.13, < 6.18.6","linux_kernel = 5.10","linux_kernel = 6.19"],"patched":["linux_kernel 6.18.6"],"published":"2026-01-31","updated":"2026-10-15","sourceUpdated":"2026-10-15T02:18:40.073","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-23019","references":[{"url":"https://git.kernel.org/stable/c/325aea74be7e192b5c947c782da23b0d19a5fda2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/326a4b7e61d01db3507f71c8bb5e85362f607064","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3950054c9512add0cc79ab7e72b6d2f9f675e25b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8a4333b2818f0d853b43e139936c20659366e4a0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/94e070cd50790317fba7787ae6006934b7edcb6f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a428e0da1248c353557970848994f35fd3f005e2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-019113.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html","label":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}],"tags":["nvd","cve.org"],"epss":0.00137,"epssPercentile":0.03083,"ingestedAt":"2026-09-08T15:33:26.994Z","slug":"CVE-2026-23019","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnet: marvell: prestera: fix NULL dereference on devlink_alloc() failure\n\ndevlink_alloc() may return NULL on allocation failure, but\nprestera_devlink_alloc() unconditionally calls devlink_priv() on\nthe returned pointer.\n\nThis leads to a NULL pointer dereference if devlink allocation fails.\nAdd a check for a NULL devlink pointer and return NULL early to avoid\nthe crash.\n\n## Affected\n\n- `linux_kernel >= 5.10.1, < 5.15.198`\n- `linux_kernel >= 5.16, < 6.1.161`\n- `linux_kernel >= 6.2, < 6.6.121`\n- `linux_kernel >= 6.7, < 6.12.66`\n- `linux_kernel >= 6.13, < 6.18.6`\n- `linux_kernel = 5.10`\n- `linux_kernel = 6.19`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.18.6`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":221611,"id":"CVE-2026-23019","ts":1792035289055,"field":"cvss","old":null,"new":"5.5"},{"seq":221610,"id":"CVE-2026-23019","ts":1792035289055,"field":"severity","old":"none","new":"medium"}]}