{ "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-2026-43464", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-43464", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-05-08T14:22:26.039Z", "updatedAt": "2026-10-21T12:40:49.291Z", "importedAt": "2026-10-24T01:58:14.884Z", "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: RX, Fix XDP multi-buf frag counting for legacy RQ", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: RX, Fix XDP multi-buf frag counting for legacy RQ\n\nXDP multi-buf programs can modify the layout of the XDP buffer when the\nprogram calls bpf_xdp_pull_data() or bpf_xdp_adjust_tail(). The\nreferenced commit in the fixes tag corrected the assumption in the mlx5\ndriver that the XDP buffer layout doesn't change during a program\nexecution. However, this fix introduced another issue: the dropped\nfragments still need to be counted on the driver side to avoid page\nfragment reference counting issues.\n\nSuch issue can be observed with the\ntest_xdp_native_adjst_tail_shrnk_data selftest when using a payload of\n3600 and shrinking by 256 bytes (an upcoming selftest patch): the last\nfragment gets released by the XDP code but doesn't get tracked by the\ndriver. This results in a negative pp_ref_count during page release and\nthe following splat:\n\n WARNING: include/net/page_pool/helpers.h:297 at mlx5e_page_release_fragmented.isra.0+0x4a/0x50 [mlx5_core], CPU#12: ip/3137\n Modules linked in: [...]\n CPU: 12 UID: 0 PID: 3137 Comm: ip Not tainted 6.19.0-rc3+ #12 NONE\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\n RIP: 0010:mlx5e_page_release_fragmented.isra.0+0x4a/0x50 [mlx5_core]\n [...]\n Call Trace:\n \n mlx5e_dealloc_rx_wqe+0xcb/0x1a0 [mlx5_core]\n mlx5e_free_rx_descs+0x7f/0x110 [mlx5_core]\n mlx5e_close_rq+0x50/0x60 [mlx5_core]\n mlx5e_close_queues+0x36/0x2c0 [mlx5_core]\n mlx5e_close_channel+0x1c/0x50 [mlx5_core]\n mlx5e_close_channels+0x45/0x80 [mlx5_core]\n mlx5e_safe_switch_params+0x1a5/0x230 [mlx5_core]\n mlx5e_change_mtu+0xf3/0x2f0 [mlx5_core]\n netif_set_mtu_ext+0xf1/0x230\n do_setlink.isra.0+0x219/0x1180\n rtnl_newlink+0x79f/0xb60\n rtnetlink_rcv_msg+0x213/0x3a0\n netlink_rcv_skb+0x48/0xf0\n netlink_unicast+0x24a/0x350\n netlink_sendmsg+0x1ee/0x410\n __sock_sendmsg+0x38/0x60\n ____sys_sendmsg+0x232/0x280\n ___sys_sendmsg+0x78/0xb0\n __sys_sendmsg+0x5f/0xb0\n [...]\n do_syscall_64+0x57/0xc50\n\nThis patch fixes the issue by doing page frag counting on all the\noriginal XDP buffer fragments for all relevant XDP actions (XDP_TX ,\nXDP_REDIRECT and XDP_PASS). This is basically reverting to the original\ncounting before the commit in the fixes tag.\n\nAs frag_page is still pointing to the original tail, the nr_frags\nparameter to xdp_update_skb_frags_info() needs to be calculated\nin a different way to reflect the new nr_frags.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "72328f25755ee966724f46e3a0e8e59bef2091ba", "status": "affected", "versionType": "git", "lessThan": "1106412414dc3ee62999115be10ca83199b02108" }, { "version": "0049fd63881505566824e88cfa624638f921c808", "status": "affected", "versionType": "git", "lessThan": "9488ee96b4f53d2aed474c744f0ed64f61d1dcc9" }, { "version": "afd5ba577c10639f62e8120df67dc70ea4b61176", "status": "affected", "versionType": "git", "lessThan": "c74557495efb4bd0adefdfc8678ecdbc82a06da3" }, { "version": "afd5ba577c10639f62e8120df67dc70ea4b61176", "status": "affected", "versionType": "git", "lessThan": "03cb50e5b74fce8bf6d92b860371b66253cf0f8d" }, { "version": "afd5ba577c10639f62e8120df67dc70ea4b61176", "status": "affected", "versionType": "git", "lessThan": "a6413e6f6c9d9bb9833324cb3753582f7bc0f2fa" }, { "version": "d969645b9b7810289bf3c353ea06957373756b8e", "status": "affected", "versionType": "git" }, { "version": "6.6.115", "status": "affected", "versionType": "semver", "lessThan": "6.6.160" }, { "version": "6.12.56", "status": "affected", "versionType": "semver", "lessThan": "6.12.114" }, { "version": "6.17.6", "status": "affected", "versionType": "semver", "lessThan": "6.18" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "6.18", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "6.18" }, { "version": "6.6.160", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.114", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.19", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "6.19.9", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.19.*" }, { "version": "7.0", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }