{"apiVersion":"1.0","identifier":"CVE-2026-74719","description":"In the Linux kernel, the following vulnerability has been resolved: net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler() The SMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT branch in smc_llc_event_handler() stores an incoming qentry into the local LLC flow without first checking whether a qentry is already pending. If a malicious or buggy peer sends a second CONFIRM_LINK or ADD_LINK_CONT request while a flow is active and flow->qentry is already set, smc_llc_flow_qentry_set() overwrites the pointer without freeing the previous allocation, leaking one kmalloc-96 object per spurious message. The sibling SMC_LLC_DELETE_LINK branch already has the correct !flow->qentry guard. Apply the same guard to the CONFIRM_LINK/ADD_LINK_CONT branch so that a duplicate message when qentry is already occupied falls through to break and is freed by the kfree(qentry) at the out: label, rather than silently leaking the existing allocation. The response direction (smc_llc_rx_response()) is unaffected: it already guards with flow->qentry at the equivalent site and drops duplicate responses correctly.","publishedAt":"2026-08-22T16:16:46","lastModifiedAt":"2026-08-22T16:16:46","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74719","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00177,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74719","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74719","en":"https://www.redsauce.net/en/cves/CVE-2026-74719","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74719","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74719","de":"https://www.redsauce.net/de/cves/CVE-2026-74719","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74719","el":"https://www.redsauce.net/el/cves/CVE-2026-74719"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74719"}}