{
  "cveId": "CVE-2026-74719",
  "url": "https://patchblox.com/security/cve/CVE-2026-74719",
  "summary": "CVE-2026-74719 is fixed in 18 products on 1 platform, first by DEBIAN-CVE-2026-74719, released August 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "net/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler()",
  "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-\u003Eqentry 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-\u003Eqentry 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-\u003Eqentry at the equivalent site and drops duplicate responses correctly.",
  "published": "2026-08-22T16:16:46Z",
  "severity": "Low",
  "cvss": 3.7,
  "epss": 0.00177,
  "epssPercentile": 0.0726,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74719",
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