CVE-2024-26640 (GCVE-0-2024-26640)
Vulnerability from cvelistv5
Published
2024-03-18 10:19
Modified
2025-05-04 08:52
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: tcp: add sanity checks to rx zerocopy TCP rx zerocopy intent is to map pages initially allocated from NIC drivers, not pages owned by a fs. This patch adds to can_map_frag() these additional checks: - Page must not be a compound one. - page->mapping must be NULL. This fixes the panic reported by ZhangPeng. syzbot was able to loopback packets built with sendfile(), mapping pages owned by an ext4 file to TCP rx zerocopy. r3 = socket$inet_tcp(0x2, 0x1, 0x0) mmap(&(0x7f0000ff9000/0x4000)=nil, 0x4000, 0x0, 0x12, r3, 0x0) r4 = socket$inet_tcp(0x2, 0x1, 0x0) bind$inet(r4, &(0x7f0000000000)={0x2, 0x4e24, @multicast1}, 0x10) connect$inet(r4, &(0x7f00000006c0)={0x2, 0x4e24, @empty}, 0x10) r5 = openat$dir(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x181e42, 0x0) fallocate(r5, 0x0, 0x0, 0x85b8) sendfile(r4, r5, 0x0, 0x8ba0) getsockopt$inet_tcp_TCP_ZEROCOPY_RECEIVE(r4, 0x6, 0x23, &(0x7f00000001c0)={&(0x7f0000ffb000/0x3000)=nil, 0x3000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, &(0x7f0000000440)=0x40) r6 = openat$dir(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x181e42, 0x0)
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/1b8adcc0e2c584fec778add7777fe28e20781e60 Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/577e4432f3ac810049cb7e6b71f4d96ec7c6e894 Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/718f446e60316bf606946f7f42367d691d21541e Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/b383d4ea272fe5795877506dcce5aad1f6330e5e Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/d15cc0f66884ef2bed28c7ccbb11c102aa3a0760 Mailing List, Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67 https://git.kernel.org/stable/c/f48bf9a83b1666d934247cb58a9887d7b3127b6f Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/1b8adcc0e2c584fec778add7777fe28e20781e60 Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/577e4432f3ac810049cb7e6b71f4d96ec7c6e894 Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/718f446e60316bf606946f7f42367d691d21541e Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/b383d4ea272fe5795877506dcce5aad1f6330e5e Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/d15cc0f66884ef2bed28c7ccbb11c102aa3a0760 Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 https://git.kernel.org/stable/c/f48bf9a83b1666d934247cb58a9887d7b3127b6f Mailing List, Patch
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html Mailing List
Impacted products
Vendor Product Version
Linux Linux Version: 93ab6cc69162775201587cc9da00d5016dc890e2
Version: 93ab6cc69162775201587cc9da00d5016dc890e2
Version: 93ab6cc69162775201587cc9da00d5016dc890e2
Version: 93ab6cc69162775201587cc9da00d5016dc890e2
Version: 93ab6cc69162775201587cc9da00d5016dc890e2
Version: 93ab6cc69162775201587cc9da00d5016dc890e2
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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, 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    "vulnrichment": {
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\"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f48bf9a83b1666d934247cb58a9887d7b3127b6f\"}, {\"url\": \"https://git.kernel.org/stable/c/718f446e60316bf606946f7f42367d691d21541e\"}, {\"url\": \"https://git.kernel.org/stable/c/b383d4ea272fe5795877506dcce5aad1f6330e5e\"}, {\"url\": \"https://git.kernel.org/stable/c/d15cc0f66884ef2bed28c7ccbb11c102aa3a0760\"}, {\"url\": \"https://git.kernel.org/stable/c/1b8adcc0e2c584fec778add7777fe28e20781e60\"}, {\"url\": \"https://git.kernel.org/stable/c/577e4432f3ac810049cb7e6b71f4d96ec7c6e894\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"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)\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T08:44:02.237Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26640\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T08:44:02.237Z\", \"dateReserved\": \"2024-02-19T14:20:24.137Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-18T10:19:07.025Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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