{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-31494", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.102Z", "datePublished": "2026-04-22T13:54:16.922Z", "dateUpdated": "2026-08-05T12:23:03.650Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:23:03.650Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macb: use the current queue number for stats\n\nThere's a potential mismatch between the memory reserved for statistics\nand the amount of memory written.\n\ngem_get_sset_count() correctly computes the number of stats based on the\nactive queues, whereas gem_get_ethtool_stats() indiscriminately copies\ndata using the maximum number of queues, and in the case the number of\nactive queues is less than MACB_MAX_QUEUES, this results in a OOB write\nas observed in the KASAN splat.\n\n==================================================================\nBUG: KASAN: vmalloc-out-of-bounds in gem_get_ethtool_stats+0x54/0x78\n [macb]\nWrite of size 760 at addr ffff80008080b000 by task ethtool/1027\n\nCPU: [...]\nTainted: [E]=UNSIGNED_MODULE\nHardware name: raspberrypi rpi/rpi, BIOS 2025.10 10/01/2025\nCall trace:\n show_stack+0x20/0x38 (C)\n dump_stack_lvl+0x80/0xf8\n print_report+0x384/0x5e0\n kasan_report+0xa0/0xf0\n kasan_check_range+0xe8/0x190\n __asan_memcpy+0x54/0x98\n gem_get_ethtool_stats+0x54/0x78 [macb\n 926c13f3af83b0c6fe64badb21ec87d5e93fcf65]\n dev_ethtool+0x1220/0x38c0\n dev_ioctl+0x4ac/0xca8\n sock_do_ioctl+0x170/0x1d8\n sock_ioctl+0x484/0x5d8\n __arm64_sys_ioctl+0x12c/0x1b8\n invoke_syscall+0xd4/0x258\n el0_svc_common.constprop.0+0xb4/0x240\n do_el0_svc+0x48/0x68\n el0_svc+0x40/0xf8\n el0t_64_sync_handler+0xa0/0xe8\n el0t_64_sync+0x1b0/0x1b8\n\nThe buggy address belongs to a 1-page vmalloc region starting at\n 0xffff80008080b000 allocated at dev_ethtool+0x11f0/0x38c0\nThe buggy address belongs to the physical page:\npage: refcount:1 mapcount:0 mapping:0000000000000000\n index:0xffff00000a333000 pfn:0xa333\nflags: 0x7fffc000000000(node=0|zone=0|lastcpupid=0x1ffff)\nraw: 007fffc000000000 0000000000000000 dead000000000122 0000000000000000\nraw: ffff00000a333000 0000000000000000 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n ffff80008080b080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff80008080b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n>ffff80008080b180: 00 00 00 00 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ^\n ffff80008080b200: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n ffff80008080b280: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8\n==================================================================\n\nFix it by making sure the copied size only considers the active number of\nqueues." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable `gem_get_ethtool_stats()` path is reached from a local userspace `SIOCETHTOOL`/`ETHTOOL_GSTATS` ioctl on a socket for an affected macb/GEM netdev, not directly from received network packets.\nAC:L - Triggering is deterministic on affected devices with fewer active queues than `MACB_MAX_QUEUES`; the attacker only needs to issue the allowed stats query.\nPR:L - `ETHTOOL_GSTATS` is explicitly allowed without `CAP_NET_ADMIN`, so any basic unprivileged local user able to access the netdev namespace can trigger it.\nUI:N - No victim action is required once the attacker can run local code; the attacker directly invokes the ioctl.\nS:U - The impact remains within the kernel/host security authority and does not cross a VM, IOMMU, or other separate security scope.\nC:H - The flaw is a kernel out-of-bounds write in a vmalloc stats buffer; following the higher-severity rule for memory corruption, it can plausibly be leveraged as part of a kernel memory disclosure primitive.\nI:H - The bug writes past the allocated ethtool stats buffer, and kernel out-of-bounds writes are treated as high-integrity-impact memory corruption with potential for control-flow or data corruption.\nA:H - KASAN demonstrates a vmalloc-out-of-bounds write from the ioctl path, and such kernel memory corruption can cause an oops/panic or repeated local denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/cadence/macb_main.c" ], "versions": [ { "version": "512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd", "lessThan": "9738be665544281aa624842812c2fbfed6f88226", "status": "affected", "versionType": "git" }, { "version": "512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd", "lessThan": "240c5302eed83e34e98db18f6795ee5f40814024", "status": "affected", "versionType": "git" }, { "version": "512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd", "lessThan": "9596759a84e1dbf2670518d85e969208960041f9", "status": "affected", "versionType": "git" }, { "version": "512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd", "lessThan": "95246341945163ad9a250a87ca5bd1c1252777ae", "status": "affected", "versionType": "git" }, { "version": "512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd", "lessThan": "9d74d10e4e26672e139a8bcf8bf95957bf2d160f", "status": "affected", "versionType": "git" }, { "version": "512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd", "lessThan": "7ff87da099210856cbfe2f2f7f52ddfa57af4f0c", "status": "affected", "versionType": "git" }, { "version": "512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd", "lessThan": "e182fe273cdf5a8931592228196ef514ffac392b", "status": "affected", "versionType": "git" }, { "version": "512286bbd4b7d5b15d26ba8078c8bfd1fc1129bd", "lessThan": "72d96e4e24bbefdcfbc68bdb9341a05d8f5cb6e5", "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/cadence/macb_main.c" ], "versions": [ { "version": "4.16", "status": "affected" }, { "version": "0", "lessThan": "4.16", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.131", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.80", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.21", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.11", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "4.16", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": 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"https://git.kernel.org/stable/c/9596759a84e1dbf2670518d85e969208960041f9" }, { "url": "https://git.kernel.org/stable/c/95246341945163ad9a250a87ca5bd1c1252777ae" }, { "url": "https://git.kernel.org/stable/c/9d74d10e4e26672e139a8bcf8bf95957bf2d160f" }, { "url": "https://git.kernel.org/stable/c/7ff87da099210856cbfe2f2f7f52ddfa57af4f0c" }, { "url": "https://git.kernel.org/stable/c/e182fe273cdf5a8931592228196ef514ffac392b" }, { "url": "https://git.kernel.org/stable/c/72d96e4e24bbefdcfbc68bdb9341a05d8f5cb6e5" } ], "title": "net: macb: use the current queue number for stats", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-07-14T12:48:03.213Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP", "versions": [ { "status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom" } ], 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