{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-50679", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50679", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-12-09T01:29:32.925Z", "updatedAt": "2026-05-11T19:23:41.023Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "i40e: Fix DMA mappings leak", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: Fix DMA mappings leak\n\nDuring reallocation of RX buffers, new DMA mappings are created for\nthose buffers.\n\nsteps for reproduction:\nwhile :\ndo\nfor ((i=0; i<=8160; i=i+32))\ndo\nethtool -G enp130s0f0 rx $i tx $i\nsleep 0.5\nethtool -g enp130s0f0\ndone\ndone\n\nThis resulted in crash:\ni40e 0000:01:00.1: Unable to allocate memory for the Rx descriptor ring, size=65536\nDriver BUG\nWARNING: CPU: 0 PID: 4300 at net/core/xdp.c:141 xdp_rxq_info_unreg+0x43/0x50\nCall Trace:\ni40e_free_rx_resources+0x70/0x80 [i40e]\ni40e_set_ringparam+0x27c/0x800 [i40e]\nethnl_set_rings+0x1b2/0x290\ngenl_family_rcv_msg_doit.isra.15+0x10f/0x150\ngenl_family_rcv_msg+0xb3/0x160\n? rings_fill_reply+0x1a0/0x1a0\ngenl_rcv_msg+0x47/0x90\n? genl_family_rcv_msg+0x160/0x160\nnetlink_rcv_skb+0x4c/0x120\ngenl_rcv+0x24/0x40\nnetlink_unicast+0x196/0x230\nnetlink_sendmsg+0x204/0x3d0\nsock_sendmsg+0x4c/0x50\n__sys_sendto+0xee/0x160\n? handle_mm_fault+0xbe/0x1e0\n? syscall_trace_enter+0x1d3/0x2c0\n__x64_sys_sendto+0x24/0x30\ndo_syscall_64+0x5b/0x1a0\nentry_SYSCALL_64_after_hwframe+0x65/0xca\nRIP: 0033:0x7f5eac8b035b\nMissing register, driver bug\nWARNING: CPU: 0 PID: 4300 at net/core/xdp.c:119 xdp_rxq_info_unreg_mem_model+0x69/0x140\nCall Trace:\nxdp_rxq_info_unreg+0x1e/0x50\ni40e_free_rx_resources+0x70/0x80 [i40e]\ni40e_set_ringparam+0x27c/0x800 [i40e]\nethnl_set_rings+0x1b2/0x290\ngenl_family_rcv_msg_doit.isra.15+0x10f/0x150\ngenl_family_rcv_msg+0xb3/0x160\n? rings_fill_reply+0x1a0/0x1a0\ngenl_rcv_msg+0x47/0x90\n? genl_family_rcv_msg+0x160/0x160\nnetlink_rcv_skb+0x4c/0x120\ngenl_rcv+0x24/0x40\nnetlink_unicast+0x196/0x230\nnetlink_sendmsg+0x204/0x3d0\nsock_sendmsg+0x4c/0x50\n__sys_sendto+0xee/0x160\n? handle_mm_fault+0xbe/0x1e0\n? syscall_trace_enter+0x1d3/0x2c0\n__x64_sys_sendto+0x24/0x30\ndo_syscall_64+0x5b/0x1a0\nentry_SYSCALL_64_after_hwframe+0x65/0xca\nRIP: 0033:0x7f5eac8b035b\n\nThis was caused because of new buffers with different RX ring count should\nsubstitute older ones, but those buffers were freed in\ni40e_configure_rx_ring and reallocated again with i40e_alloc_rx_bi,\nthus kfree on rx_bi caused leak of already mapped DMA.\n\nFix this by reallocating ZC with rx_bi_zc struct when BPF program loads. Additionally\nreallocate back to rx_bi when BPF program unloads.\n\nIf BPF program is loaded/unloaded and XSK pools are created, reallocate\nRX queues accordingly in XSP_SETUP_XSK_POOL handler.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "be1222b585fdc410b8c1dbcc57dd03a00f04eff5", "status": "affected", "versionType": "git", "lessThan": "ed5baf3d0a33caaca4cd4073ebb0854cc77a616d" }, { "version": "be1222b585fdc410b8c1dbcc57dd03a00f04eff5", "status": "affected", "versionType": "git", "lessThan": "94a171c982b8a8137a00721c1e62bc2713435bca" }, { "version": "be1222b585fdc410b8c1dbcc57dd03a00f04eff5", "status": "affected", "versionType": "git", "lessThan": "5f499596dfa3db9b3172645b6de9e1096a669c95" }, { "version": "be1222b585fdc410b8c1dbcc57dd03a00f04eff5", "status": "affected", "versionType": "git", "lessThan": "aae425efdfd1b1d8452260a3cb49344ebf20b1f5" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.8" }, { "version": "5.10.152", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.76", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.0.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.0.*" }, { "version": "6.1", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }