{ "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-2026-72341", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-72341", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-15T05:55:47.764Z", "updatedAt": "2026-10-21T12:44:38.498Z", "importedAt": "2026-10-24T01:58:25.636Z", "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": "net/mlx5e: Fix publication race for priv->channel_stats[]", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Fix publication race for priv->channel_stats[]\n\nmlx5e_channel_stats_alloc() publishes a new entry to\npriv->channel_stats[] and then increments priv->stats_nch as a\npublication token, but neither store carries any memory barrier:\n\n\tpriv->channel_stats[ix] = kvzalloc_node(...);\n\tif (!priv->channel_stats[ix])\n\t\treturn -ENOMEM;\n\tpriv->stats_nch++;\n\nConcurrent readers compute the loop bound from priv->stats_nch and\nthen dereference priv->channel_stats[i] using plain accesses, e.g.\n\n\tfor (i = 0; i < priv->stats_nch; i++) {\n\t\tstruct mlx5e_channel_stats *cs = priv->channel_stats[i];\n\t\t... cs->rq.packets ...\n\t}\n\nOn weakly-ordered architectures (ARM, PowerPC, RISC-V) the writes to\nchannel_stats[ix] and stats_nch may become visible to other CPUs out\nof program order. A reader can observe stats_nch == N while still\nseeing channel_stats[N-1] == NULL, leading to a NULL pointer\ndereference in the channel_stats loop.\n\nThis has been observed in production on BlueField-3 DPUs (arm64),\nwhere ovs-vswitchd queries netdev statistics over netlink during NIC\nbringup, racing mlx5e_open_channel() -> mlx5e_channel_stats_alloc()\non another CPU:\n\n Unable to handle kernel NULL pointer dereference at virtual address 0x840\n Hardware name: BlueField-3 DPU\n pc : mlx5e_fold_sw_stats64+0x30/0x180 [mlx5_core]\n Call trace:\n mlx5e_fold_sw_stats64+0x30/0x180 [mlx5_core]\n dev_get_stats+0x50/0xc0\n ovs_vport_get_stats+0x38/0xac [openvswitch]\n ovs_vport_cmd_fill_info+0x194/0x290 [openvswitch]\n ovs_vport_cmd_get+0xbc/0x10c [openvswitch]\n genl_family_rcv_msg_doit+0xd0/0x160\n genl_rcv_msg+0xec/0x1f0\n netlink_rcv_skb+0x64/0x130\n genl_rcv+0x40/0x60\n netlink_unicast+0x2fc/0x370\n netlink_sendmsg+0x1dc/0x454\n ...\n __arm64_sys_sendmsg+0x2c/0x40\n\nAdd mlx5e_stats_nch_write() and mlx5e_stats_nch_read() helpers in en.h\nthat wrap the smp_store_release()/smp_load_acquire() pair on stats_nch.\nThe release/acquire pair establishes the contract:\n\n stats_nch == N => channel_stats[0..N-1] are visible and non-NULL.\n\nPublish the stats_nch increment via mlx5e_stats_nch_write() in the\nwriter (mlx5e_channel_stats_alloc()), and read stats_nch via\nmlx5e_stats_nch_read() in all readers: mlx5e RX/TX queue stats,\nmlx5e_get_base_stats(), ethtool channels stats, IPoIB stats, the\nsw_stats fold and the HV VHCA stats agent.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "fa691d0c9c0812b9045f3a9420862e47b3b92518", "status": "affected", "versionType": "git", "lessThan": "268869794170af37727816ad02051808adb9c9c3" }, { "version": "fa691d0c9c0812b9045f3a9420862e47b3b92518", "status": "affected", "versionType": "git", "lessThan": "acd34d24342a28794e706ce8191ca6c3114a38ae" }, { "version": "fa691d0c9c0812b9045f3a9420862e47b3b92518", "status": "affected", "versionType": "git", "lessThan": "5c7e3755abf663f033de24f917b77685e9543045" }, { "version": "fa691d0c9c0812b9045f3a9420862e47b3b92518", "status": "affected", "versionType": "git", "lessThan": "815515ec68f527ca755cb1e2c1ff9148f6b3ea56" }, { "version": "fa691d0c9c0812b9045f3a9420862e47b3b92518", "status": "affected", "versionType": "git", "lessThan": "5a799714e8ca0bce9ea40694f49914cf1adbbaa9" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.17", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.17" }, { "version": "6.6.160", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.114", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.40", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.5", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }