CVE-2024-26640
Vulnerability from cvelistv5
Published
2024-03-18 10:19
Modified
2024-11-05 09:13
Severity ?
EPSS score ?
Summary
tcp: add sanity checks to rx zerocopy
References
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: add sanity checks to rx zerocopy\n\nTCP rx zerocopy intent is to map pages initially allocated\nfrom NIC drivers, not pages owned by a fs.\n\nThis patch adds to can_map_frag() these additional checks:\n\n- Page must not be a compound one.\n- page-\u003emapping must be NULL.\n\nThis fixes the panic reported by ZhangPeng.\n\nsyzbot was able to loopback packets built with sendfile(),\nmapping pages owned by an ext4 file to TCP rx zerocopy.\n\nr3 = socket$inet_tcp(0x2, 0x1, 0x0)\nmmap(\u0026(0x7f0000ff9000/0x4000)=nil, 0x4000, 0x0, 0x12, r3, 0x0)\nr4 = socket$inet_tcp(0x2, 0x1, 0x0)\nbind$inet(r4, \u0026(0x7f0000000000)={0x2, 0x4e24, @multicast1}, 0x10)\nconnect$inet(r4, \u0026(0x7f00000006c0)={0x2, 0x4e24, @empty}, 0x10)\nr5 = openat$dir(0xffffffffffffff9c, \u0026(0x7f00000000c0)=\u0027./file0\\x00\u0027,\n 0x181e42, 0x0)\nfallocate(r5, 0x0, 0x0, 0x85b8)\nsendfile(r4, r5, 0x0, 0x8ba0)\ngetsockopt$inet_tcp_TCP_ZEROCOPY_RECEIVE(r4, 0x6, 0x23,\n \u0026(0x7f00000001c0)={\u0026(0x7f0000ffb000/0x3000)=nil, 0x3000, 0x0, 0x0, 0x0,\n 0x0, 0x0, 0x0, 0x0}, \u0026(0x7f0000000440)=0x40)\nr6 = openat$dir(0xffffffffffffff9c, \u0026(0x7f00000000c0)=\u0027./file0\\x00\u0027,\n 0x181e42, 0x0)"
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"nvd": "{\"cve\":{\"id\":\"CVE-2024-26640\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-18T11:15:11.043\",\"lastModified\":\"2024-11-05T10:15:36.240\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntcp: add sanity checks to rx zerocopy\\n\\nTCP rx zerocopy intent is to map pages initially allocated\\nfrom NIC drivers, not pages owned by a fs.\\n\\nThis patch adds to can_map_frag() these additional checks:\\n\\n- Page must not be a compound one.\\n- page-\u003emapping must be NULL.\\n\\nThis fixes the panic reported by ZhangPeng.\\n\\nsyzbot was able to loopback packets built with sendfile(),\\nmapping pages owned by an ext4 file to TCP rx zerocopy.\\n\\nr3 = socket$inet_tcp(0x2, 0x1, 0x0)\\nmmap(\u0026(0x7f0000ff9000/0x4000)=nil, 0x4000, 0x0, 0x12, r3, 0x0)\\nr4 = socket$inet_tcp(0x2, 0x1, 0x0)\\nbind$inet(r4, \u0026(0x7f0000000000)={0x2, 0x4e24, @multicast1}, 0x10)\\nconnect$inet(r4, \u0026(0x7f00000006c0)={0x2, 0x4e24, @empty}, 0x10)\\nr5 = openat$dir(0xffffffffffffff9c, \u0026(0x7f00000000c0)=\u0027./file0\\\\x00\u0027,\\n 0x181e42, 0x0)\\nfallocate(r5, 0x0, 0x0, 0x85b8)\\nsendfile(r4, r5, 0x0, 0x8ba0)\\ngetsockopt$inet_tcp_TCP_ZEROCOPY_RECEIVE(r4, 0x6, 0x23,\\n \u0026(0x7f00000001c0)={\u0026(0x7f0000ffb000/0x3000)=nil, 0x3000, 0x0, 0x0, 0x0,\\n 0x0, 0x0, 0x0, 0x0}, \u0026(0x7f0000000440)=0x40)\\nr6 = openat$dir(0xffffffffffffff9c, \u0026(0x7f00000000c0)=\u0027./file0\\\\x00\u0027,\\n 0x181e42, 0x0)\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tcp: agregue controles de seguridad a rx zerocopy La intenci\u00f3n de TCP rx zerocopy es mapear p\u00e1ginas inicialmente asignadas desde controladores NIC, no p\u00e1ginas propiedad de un fs. Este parche a\u00f1ade a can_map_frag() estas comprobaciones adicionales: - La p\u00e1gina no debe ser compuesta. - p\u00e1gina-\u0026gt;mapeo debe ser NULL. Esto soluciona el p\u00e1nico informado por ZhangPeng. syzbot pudo realizar un loopback de paquetes creados con sendfile(), asignando p\u00e1ginas propiedad de un archivo ext4 a TCP rx zerocopy. r3 = socket$inet_tcp(0x2, 0x1, 0x0) mmap(\u0026amp;(0x7f0000ff9000/0x4000)=nil, 0x4000, 0x0, 0x12, r3, 0x0) r4 = socket$inet_tcp(0x2, 0x1, 0x0) bind$inet(r4 , \u0026amp;(0x7f0000000000)={0x2, 0x4e24, @multicast1}, 0x10) connect$inet(r4, \u0026amp;(0x7f00000006c0)={0x2, 0x4e24, @empty}, 0x10) r5 = openat$dir(0xffffffffffffff9c, \u0026amp;(0x7f00) 000000c0 )=\u0027./file0\\\\x00\u0027, 0x181e42, 0x0) fallocate(r5, 0x0, 0x0, 0x85b8) sendfile(r4, r5, 0x0, 0x8ba0) getsockopt$inet_tcp_TCP_ZEROCOPY_RECEIVE(r4, 0x6, 0x23, \u0026amp;(0x7f00000) 001c0)={ \u0026amp;(0x7f0000ffb000/0x3000)=nil, 0x3000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, \u0026amp;(0x7f0000000440)=0x40) r6 = openat$dir(0xffffffffffffff9c, \u0026amp;(0x7f000) 00000c0)=\u0027./archivo0 \\\\x00\u0027, 0x181e42, 0x0)\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1b8adcc0e2c584fec778add7777fe28e20781e60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/577e4432f3ac810049cb7e6b71f4d96ec7c6e894\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/718f446e60316bf606946f7f42367d691d21541e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b383d4ea272fe5795877506dcce5aad1f6330e5e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d15cc0f66884ef2bed28c7ccbb11c102aa3a0760\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f48bf9a83b1666d934247cb58a9887d7b3127b6f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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