{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53234","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-06-09T07:44:35.393Z","datePublished":"2026-06-25T08:39:31.852Z","dateUpdated":"2026-06-25T08:39:31.852Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-06-25T08:39:31.852Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ibm: emac: Fix use-after-free during device removal\n\nThe driver was using devm_register_netdev() which causes unregister_netdev()\nto be deferred until the devres cleanup phase, which runs after emac_remove()\nreturns. This creates a use-after-free window where:\n\n1. emac_remove() is called, which tears down hardware (cancels work, detaches\n   modules, unregisters from MAL)\n2. emac_remove() returns\n3. devres cleanup runs and finally calls unregister_netdev()\n\nDuring step 3, the network stack might still process packets, triggering\nemac_irq(), emac_poll(), or other handlers that access now-freed hardware\nresources (dev->emacp, dev->mal, etc.).\n\nFix this by replacing devm_register_netdev() with manual register_netdev()\nand calling unregister_netdev() at the beginning of emac_remove(), before\nany hardware teardown. This ensures the network device is fully stopped and\nunregistered before hardware resources are released.\n\nThe change is safe because:\n- dev->ndev is assigned very early in probe (before any error paths that\n  could bypass emac_remove)\n- platform_set_drvdata() is only called after successful registration, so\n  emac_remove() only runs for fully registered devices\n- unregister_netdev() is idempotent and safe to call on any registered device"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/ibm/emac/core.c"],"versions":[{"version":"a4dd8535a527061a01f2fd335596fa77ca240a96","lessThan":"cf8e14db93eaecc4c0c58299be3b3183b0e53ed5","status":"affected","versionType":"git"},{"version":"a4dd8535a527061a01f2fd335596fa77ca240a96","lessThan":"c09c2e236eef6f59e105f38a30f5439e6ccbcad7","status":"affected","versionType":"git"},{"version":"a4dd8535a527061a01f2fd335596fa77ca240a96","lessThan":"c12584cd6078085d707266be864e7e1cc91d74e3","status":"affected","versionType":"git"},{"version":"a4dd8535a527061a01f2fd335596fa77ca240a96","lessThan":"a0130d682222ae21afc395aead7cd2d87e1a8358","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/ibm/emac/core.c"],"versions":[{"version":"6.12","status":"affected"},{"version":"0","lessThan":"6.12","status":"unaffected","versionType":"semver"},{"version":"6.12.94","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.36","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.0.13","lessThanOrEqual":"7.0.*","status":"unaffected","versionType":"semver"},{"version":"7.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.12.94"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.18.36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"7.0.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/cf8e14db93eaecc4c0c58299be3b3183b0e53ed5"},{"url":"https://git.kernel.org/stable/c/c09c2e236eef6f59e105f38a30f5439e6ccbcad7"},{"url":"https://git.kernel.org/stable/c/c12584cd6078085d707266be864e7e1cc91d74e3"},{"url":"https://git.kernel.org/stable/c/a0130d682222ae21afc395aead7cd2d87e1a8358"}],"title":"net: ibm: emac: Fix use-after-free during device removal","x_generator":{"engine":"bippy-1.2.0"}}}}