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Linux 7-els", "product_id": "rhel-7-els.els:python-perf" }, "product_reference": "python-perf", "relates_to_product_reference": "rhel-7-els.els" }, { "category": "default_component_of", "full_product_name": { "name": "python-perf as a component of Red Hat Enterprise Linux 6-els", "product_id": "rhel-6-els.els:python-perf" }, "product_reference": "python-perf", "relates_to_product_reference": "rhel-6-els.els" }, { "category": "default_component_of", "full_product_name": { "name": "python-perf-debuginfo as a component of Red Hat Enterprise Linux 7-els", "product_id": "rhel-7-els.els:python-perf-debuginfo" }, "product_reference": "python-perf-debuginfo", "relates_to_product_reference": "rhel-7-els.els" }, { "category": "default_component_of", "full_product_name": { "name": "python-perf-debuginfo as a component of Red Hat Enterprise Linux 6-els", "product_id": "rhel-6-els.els:python-perf-debuginfo" }, "product_reference": "python-perf-debuginfo", "relates_to_product_reference": "rhel-6-els.els" }, { "category": "default_component_of", "full_product_name": { "name": "python3-perf as a component of Red Hat Enterprise Linux 9.9", "product_id": "rhel-9:python3-perf" }, "product_reference": "python3-perf", "relates_to_product_reference": "rhel-9" }, { "category": "default_component_of", "full_product_name": { "name": "rtla as a component of Red Hat Enterprise Linux 9.9", "product_id": "rhel-9:rtla" }, "product_reference": "rtla", "relates_to_product_reference": "rhel-9" }, { "category": "default_component_of", "full_product_name": { "name": "rv as a component of Red Hat Enterprise Linux 9.9", "product_id": "rhel-9:rv" }, "product_reference": "rv", "relates_to_product_reference": "rhel-9" } ] }, "vulnerabilities": [ { "cve": "CVE-2021-46955", "cwe": { "id": "CWE-125", "name": "Out-of-bounds Read" }, "discovery_date": "2024-02-27T00:00:00+00:00", "flags": [ { "label": "vulnerable_code_not_present", "product_ids": [ "rhel-6-els.els:kernel-debug-debuginfo", "rhel-6-els.els:kernel-debug-devel", "rhel-6-els.els:kernel-debuginfo", "rhel-6-els.els:kernel-devel", "rhel-6-els.els:kernel-doc", "rhel-6-els.els:kernel-headers", "rhel-6-els.els:kernel-kdump-debuginfo", "rhel-6-els.els:kernel-kdump-devel", "rhel-6-els.els:perf-debuginfo", "rhel-6-els.els:python-perf-debuginfo", "rhel-7-els.els:bpftool-debuginfo", "rhel-7-els.els:kernel-debug-debuginfo", "rhel-7-els.els:kernel-debug-devel", "rhel-7-els.els:kernel-debuginfo", "rhel-7-els.els:kernel-devel", "rhel-7-els.els:kernel-doc", "rhel-7-els.els:kernel-headers", "rhel-7-els.els:kernel-kdump-debuginfo", "rhel-7-els.els:kernel-kdump-devel", "rhel-7-els.els:kernel-rt-debug-debuginfo", "rhel-7-els.els:kernel-rt-debug-devel", "rhel-7-els.els:kernel-rt-debug-kvm-debuginfo", "rhel-7-els.els:kernel-rt-debuginfo", "rhel-7-els.els:kernel-rt-devel", "rhel-7-els.els:kernel-rt-doc", "rhel-7-els.els:kernel-rt-kvm-debuginfo", "rhel-7-els.els:kernel-rt-trace-debuginfo", "rhel-7-els.els:kernel-rt-trace-devel", "rhel-7-els.els:kernel-rt-trace-kvm-debuginfo", "rhel-7-els.els:kernel-tools-debuginfo", "rhel-7-els.els:kernel-tools-libs-devel", "rhel-7-els.els:perf-debuginfo", "rhel-7-els.els:python-perf-debuginfo", "rhel-8:kernel-rt", "rhel-8:kernel-rt-core", "rhel-8:kernel-rt-debug", "rhel-8:kernel-rt-debug-core", "rhel-8:kernel-rt-debug-devel", "rhel-8:kernel-rt-debug-kvm", "rhel-8:kernel-rt-debug-modules", "rhel-8:kernel-rt-debug-modules-extra", "rhel-8:kernel-rt-devel", "rhel-8:kernel-rt-kvm", "rhel-8:kernel-rt-modules", "rhel-8:kernel-rt-modules-extra", "rhel-8:kernel-rt.src", "rhel-8:kernel-tools-libs-devel", "rhel-8:kernel.src", "rhel-9:bpftool", "rhel-9:kernel-64k-debug-devel", "rhel-9:kernel-64k-debug-devel-matched", "rhel-9:kernel-64k-devel", "rhel-9:kernel-64k-devel-matched", "rhel-9:kernel-cross-headers", "rhel-9:kernel-debug-devel", "rhel-9:kernel-debug-devel-matched", "rhel-9:kernel-devel", "rhel-9:kernel-devel-matched", "rhel-9:kernel-doc", "rhel-9:kernel-headers", "rhel-9:kernel-rt", "rhel-9:kernel-rt-64k", "rhel-9:kernel-rt-64k-core", "rhel-9:kernel-rt-64k-debug", "rhel-9:kernel-rt-64k-debug-core", "rhel-9:kernel-rt-64k-debug-devel", "rhel-9:kernel-rt-64k-debug-modules", "rhel-9:kernel-rt-64k-debug-modules-core", "rhel-9:kernel-rt-64k-debug-modules-extra", "rhel-9:kernel-rt-64k-devel", "rhel-9:kernel-rt-64k-modules", "rhel-9:kernel-rt-64k-modules-core", "rhel-9:kernel-rt-64k-modules-extra", "rhel-9:kernel-rt-core", "rhel-9:kernel-rt-debug", "rhel-9:kernel-rt-debug-core", "rhel-9:kernel-rt-debug-devel", "rhel-9:kernel-rt-debug-kvm", "rhel-9:kernel-rt-debug-modules", "rhel-9:kernel-rt-debug-modules-core", "rhel-9:kernel-rt-debug-modules-extra", "rhel-9:kernel-rt-devel", "rhel-9:kernel-rt-kvm", "rhel-9:kernel-rt-modules", "rhel-9:kernel-rt-modules-core", "rhel-9:kernel-rt-modules-extra", "rhel-9:kernel-rt.src", "rhel-9:kernel-tools-libs-devel", "rhel-9:kernel-zfcpdump-devel", "rhel-9:kernel-zfcpdump-devel-matched", "rhel-9:kernel.src", "rhel-9:libperf", "rhel-9:perf", "rhel-9:python3-perf", "rhel-9:rtla", "rhel-9:rv" ] } ], "notes": [ { "category": "description", "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: fix stack OOB read while fragmenting IPv4 packets\n\nrunning openvswitch on kernels built with KASAN, it's possible to see the\nfollowing splat while testing fragmentation of IPv4 packets:\n\n BUG: KASAN: stack-out-of-bounds in ip_do_fragment+0x1b03/0x1f60\n Read of size 1 at addr ffff888112fc713c by task handler2/1367\n\n CPU: 0 PID: 1367 Comm: handler2 Not tainted 5.12.0-rc6+ #418\n Hardware name: Red Hat KVM, BIOS 1.11.1-4.module+el8.1.0+4066+0f1aadab 04/01/2014\n Call Trace:\n dump_stack+0x92/0xc1\n print_address_description.constprop.7+0x1a/0x150\n kasan_report.cold.13+0x7f/0x111\n ip_do_fragment+0x1b03/0x1f60\n ovs_fragment+0x5bf/0x840 [openvswitch]\n do_execute_actions+0x1bd5/0x2400 [openvswitch]\n ovs_execute_actions+0xc8/0x3d0 [openvswitch]\n ovs_packet_cmd_execute+0xa39/0x1150 [openvswitch]\n genl_family_rcv_msg_doit.isra.15+0x227/0x2d0\n genl_rcv_msg+0x287/0x490\n netlink_rcv_skb+0x120/0x380\n genl_rcv+0x24/0x40\n netlink_unicast+0x439/0x630\n netlink_sendmsg+0x719/0xbf0\n sock_sendmsg+0xe2/0x110\n ____sys_sendmsg+0x5ba/0x890\n ___sys_sendmsg+0xe9/0x160\n __sys_sendmsg+0xd3/0x170\n do_syscall_64+0x33/0x40\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n RIP: 0033:0x7f957079db07\n Code: c3 66 90 41 54 41 89 d4 55 48 89 f5 53 89 fb 48 83 ec 10 e8 eb ec ff ff 44 89 e2 48 89 ee 89 df 41 89 c0 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 48 89 44 24 08 e8 24 ed ff ff 48\n RSP: 002b:00007f956ce35a50 EFLAGS: 00000293 ORIG_RAX: 000000000000002e\n RAX: ffffffffffffffda RBX: 0000000000000019 RCX: 00007f957079db07\n RDX: 0000000000000000 RSI: 00007f956ce35ae0 RDI: 0000000000000019\n RBP: 00007f956ce35ae0 R08: 0000000000000000 R09: 00007f9558006730\n R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000\n R13: 00007f956ce37308 R14: 00007f956ce35f80 R15: 00007f956ce35ae0\n\n The buggy address belongs to the page:\n page:00000000af2a1d93 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x112fc7\n flags: 0x17ffffc0000000()\n raw: 0017ffffc0000000 0000000000000000 dead000000000122 0000000000000000\n raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000\n page dumped because: kasan: bad access detected\n\n addr ffff888112fc713c is located in stack of task handler2/1367 at offset 180 in frame:\n ovs_fragment+0x0/0x840 [openvswitch]\n\n this frame has 2 objects:\n [32, 144) 'ovs_dst'\n [192, 424) 'ovs_rt'\n\n Memory state around the buggy address:\n ffff888112fc7000: f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff888112fc7080: 00 f1 f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00\n >ffff888112fc7100: 00 00 00 f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00\n ^\n ffff888112fc7180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n ffff888112fc7200: 00 00 00 00 00 00 f2 f2 f2 00 00 00 00 00 00 00\n\nfor IPv4 packets, ovs_fragment() uses a temporary struct dst_entry. Then,\nin the following call graph:\n\n ip_do_fragment()\n ip_skb_dst_mtu()\n ip_dst_mtu_maybe_forward()\n ip_mtu_locked()\n\nthe pointer to struct dst_entry is used as pointer to struct rtable: this\nturns the access to struct members like rt_mtu_locked into an OOB read in\nthe stack. Fix this changing the temporary variable used for IPv4 packets\nin ovs_fragment(), similarly to what is done for IPv6 few lines below.", "title": "Vulnerability description" } ], "product_status": { "known_affected": [ "rhel-6-els.els:kernel", "rhel-6-els.els:kernel-abi-whitelists", "rhel-6-els.els:kernel-debug", "rhel-6-els.els:kernel-debuginfo-common-i686", "rhel-6-els.els:kernel-debuginfo-common-s390x", "rhel-6-els.els:kernel-debuginfo-common-x86_64", "rhel-6-els.els:kernel-firmware", "rhel-6-els.els:kernel-kdump", "rhel-6-els.els:kernel.src", "rhel-6-els.els:perf", "rhel-6-els.els:python-perf", "rhel-7-els.els:bpftool", "rhel-7-els.els:kernel", "rhel-7-els.els:kernel-abi-whitelists", "rhel-7-els.els:kernel-bootwrapper", "rhel-7-els.els:kernel-debug", "rhel-7-els.els:kernel-debuginfo-common-ppc64", "rhel-7-els.els:kernel-debuginfo-common-ppc64le", "rhel-7-els.els:kernel-debuginfo-common-s390x", "rhel-7-els.els:kernel-debuginfo-common-x86_64", "rhel-7-els.els:kernel-kdump", 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"rhel-9:kernel-rt-debug-core", "rhel-9:kernel-rt-debug-devel", "rhel-9:kernel-rt-debug-kvm", "rhel-9:kernel-rt-debug-modules", "rhel-9:kernel-rt-debug-modules-core", "rhel-9:kernel-rt-debug-modules-extra", "rhel-9:kernel-rt-devel", "rhel-9:kernel-rt-kvm", "rhel-9:kernel-rt-modules", "rhel-9:kernel-rt-modules-core", "rhel-9:kernel-rt-modules-extra", "rhel-9:kernel-rt.src", "rhel-9:kernel-tools-libs-devel", "rhel-9:kernel-zfcpdump-devel", "rhel-9:kernel-zfcpdump-devel-matched", "rhel-9:kernel.src", "rhel-9:libperf", "rhel-9:perf", "rhel-9:python3-perf", "rhel-9:rtla", "rhel-9:rv" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2021-46955" }, { "category": "external", "summary": "nvd.nist.gov", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46955" }, { "category": "external", "summary": "www.cve.org", "url": "https://www.cve.org/CVERecord?id=CVE-2021-46955" } ], "remediations": [ { "category": "no_fix_planned", "details": "Out of support scope", "product_ids": [ "rhel-6-els.els:kernel", "rhel-6-els.els:kernel-abi-whitelists", "rhel-6-els.els:kernel-debug", "rhel-6-els.els:kernel-debuginfo-common-i686", "rhel-6-els.els:kernel-debuginfo-common-s390x", "rhel-6-els.els:kernel-debuginfo-common-x86_64", "rhel-6-els.els:kernel-firmware", "rhel-6-els.els:kernel-kdump", "rhel-6-els.els:kernel.src", "rhel-6-els.els:perf", "rhel-6-els.els:python-perf", "rhel-7-els.els:bpftool", "rhel-7-els.els:kernel", "rhel-7-els.els:kernel-abi-whitelists", "rhel-7-els.els:kernel-bootwrapper", "rhel-7-els.els:kernel-debug", "rhel-7-els.els:kernel-debuginfo-common-ppc64", "rhel-7-els.els:kernel-debuginfo-common-ppc64le", "rhel-7-els.els:kernel-debuginfo-common-s390x", "rhel-7-els.els:kernel-debuginfo-common-x86_64", "rhel-7-els.els:kernel-kdump", "rhel-7-els.els:kernel-rt", "rhel-7-els.els:kernel-rt-debug", "rhel-7-els.els:kernel-rt-debug-kvm", "rhel-7-els.els:kernel-rt-debuginfo-common-x86_64", 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"rhel-9:kernel-rt-modules", "rhel-9:kernel-rt-modules-core", "rhel-9:kernel-rt-modules-extra", "rhel-9:kernel-rt.src", "rhel-9:kernel-tools-libs-devel", "rhel-9:kernel-zfcpdump-devel", "rhel-9:kernel-zfcpdump-devel-matched", "rhel-9:kernel.src", "rhel-9:libperf", "rhel-9:perf", "rhel-9:python3-perf", "rhel-9:rtla", "rhel-9:rv" ] } ], "title": "fix stack OOB read while fragmenting IPv4 packets" } ] }