{"apiVersion":"1.0","identifier":"CVE-2026-72423","description":"In the Linux kernel, the following vulnerability has been resolved: bpf: Guard conntrack opts error writes The conntrack lookup and allocation kfuncs take an opts pointer together with an opts__sz argument. The verifier checks only the memory range described by opts__sz, but the wrappers unconditionally write opts->error whenever the internal lookup or allocation helper returns an error. For an invalid size smaller than the end of opts->error, that write can land outside the verifier-checked range. Keep returning NULL for invalid arguments, but only report the error through opts->error when the supplied size includes the field. This preserves error reporting for the supported 12-byte and 16-byte layouts, and for other invalid sizes that still include opts->error.","publishedAt":"2026-08-15T06:22:16","lastModifiedAt":"2026-08-17T06:19:09","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-72423","cvssScore":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","epssProbability":0.00154,"riskScore":0.89,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-72423","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-72423","en":"https://www.redsauce.net/en/cves/CVE-2026-72423","fr":"https://www.redsauce.net/fr/cves/CVE-2026-72423","pt":"https://www.redsauce.net/pt/cves/CVE-2026-72423","de":"https://www.redsauce.net/de/cves/CVE-2026-72423","sk":"https://www.redsauce.net/sk/cves/CVE-2026-72423","el":"https://www.redsauce.net/el/cves/CVE-2026-72423"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-72423"}}