{ "affected": [ { "ranges": [ { "events": [ { "introduced": "c301f0981fdd3fd1ffac6836b423c4d7a8e0eb63" }, { "fixed": "3c5fb3a6c8118d15e60295e76fb5b879021eef43" }, { "fixed": "dc29c0478b8564feb9371e715b5a0016eb8903fd" }, { "fixed": "bb061d3de41707415269be75ebf700efb03ec212" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "4.19.307" }, { "fixed": "4.20" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "5.4.269" }, { "fixed": "5.5" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "5.10.210" }, { "fixed": "5.11" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "5.15.140" }, { "fixed": "5.16" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "6.1.64" }, { "fixed": "6.2" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "6.5.13" }, { "fixed": "6.6" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "6.6.3" }, { "fixed": "6.7" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "fca41e5b687e029f69e3a35a2fa31e2560e538dc" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "25b42be4e067e107a2559266b54bf07fa5b094fb" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "9a865a11d6890d4a789db1eaafebdc8bd092b12c" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "b8b514b2a6cdfac24911e4910461bcb9db15ca8d" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "18a169810cff769a7a697b35058c756805f589e0" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "1a605657adc58b3c8e2c1c66aaa5fecd29072135" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" }, { "events": [ { "introduced": "013deed31ab15ef287b0045e4e7bd8f250e75b94" } ], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "type": "GIT" } ] }, { "package": { "ecosystem": "Linux", "name": "Kernel" }, "ranges": [ { "events": [ { "introduced": "6.7.0" }, { "fixed": "6.12.115" } ], "type": "ECOSYSTEM" }, { "events": [ { "introduced": "6.13.0" }, { "fixed": "6.18.59" } ], "type": "ECOSYSTEM" } ] } ], "database_specific": { "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99285.json" }, "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_byteorder: remove multi-register support\n\n64bit byteorder conversion is broken when several registers need to be\nconverted because the source register array advances in steps for 4 bytes\ninstead of 8:\n\n for (i = ...\n src64 = nft_reg_load64(\u0026src[i]);\n ~~~~~ u32 *src\n nft_reg_store64(\u0026dst64[i],\n\nRemove the multi-register support, it has other issues as well:\n\nPablo points out that commit\ncaf3ef7468f7 (\"netfilter: nf_tables: prevent OOB access in nft_byteorder_eval\")\nalters semantics: before the loop operated on registers, i.e.\n for ( ... )\n dst32[i] = htons((u16)src32[i])\n\n .. but after the patch it will operate on bytes, which makes this\n useless to convert e.g. concatenations, which store each compound\n in its own register.\n\nMulti-convert of u32 has one theoretical application:\n\nct mark . meta mark . tcp dport @intervalset\n\nBecause ct mark and meta mark are host byte order, use with\nintervals has to convert the byteorder for ct/meta mark value\nto network byte order (bigendian).\n\nnftables emits this:\n [ meta load mark =\u003e reg 1 ]\n [ byteorder reg 1 = hton(reg 1, 4, 4) ]\n [ ct load mark =\u003e reg 9 ]\n [ byteorder reg 9 = hton(reg 9, 4, 4) ]\n ...\n\nI.e. two separate calls. Theoretically it could be changed to do:\n [ meta load mark =\u003e reg 1 ]\n [ ct load mark =\u003e reg 9 ]\n [ byteorder reg 1 = htonl(reg 1, 4, 8) ]\n ...\n\nBut then all it would take to change the set to\nmeta mark . tcp dport . ct mark\n\n... and we'd be back to two \"byteorder\" calls. IOW, support to\nconvert a range of registers is both dysfunctional and dubious.\n\nSimplify this: remove the feature.\n\nPablo Neira Ayuso points out that nftables before 1.1.0 can generate\nincorrect byteorder conversions, see 9fe58952c45a,\n\"evaluate: skip byteorder conversion for selector smaller than 2 bytes\"\nin nftables.git). Affected rulesets fail to load with this change and\nold userspace due to 'len != size' check.", "id": "CVE-2026-99285", "modified": "2026-11-12T02:30:26.199652064Z", "published": "2026-11-10T17:37:13.348Z", "references": [ { "type": "WEB", "url": "https://git.kernel.org/stable/c/3c5fb3a6c8118d15e60295e76fb5b879021eef43" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/bb061d3de41707415269be75ebf700efb03ec212" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/dc29c0478b8564feb9371e715b5a0016eb8903fd" }, { "type": "ADVISORY", "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99285.json" }, { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99285" }, { "type": "PACKAGE", "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git" } ], "schema_version": "1.9.2", "summary": "netfilter: nft_byteorder: remove multi-register support" }