CVE-2024-26640 (GCVE-0-2024-26640)

Vulnerability from cvelistv5 – Published: 2024-03-18 10:19 – Updated: 2026-05-11 20:01
VLAI?
Title
tcp: add sanity checks to rx zerocopy
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$dir(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x181e42, 0x0)
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < f48bf9a83b1666d934247cb58a9887d7b3127b6f (git)
Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < 718f446e60316bf606946f7f42367d691d21541e (git)
Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < b383d4ea272fe5795877506dcce5aad1f6330e5e (git)
Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < d15cc0f66884ef2bed28c7ccbb11c102aa3a0760 (git)
Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < 1b8adcc0e2c584fec778add7777fe28e20781e60 (git)
Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < 577e4432f3ac810049cb7e6b71f4d96ec7c6e894 (git)
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Linux Linux Affected: 4.18
Unaffected: 0 , < 4.18 (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.77 , ≤ 6.1.* (semver)
Unaffected: 6.6.16 , ≤ 6.6.* (semver)
Unaffected: 6.7.4 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntcp: add sanity checks to rx zerocopy\\n\\nTCP rx zerocopy intent is to map pages initially allocated\\nfrom NIC drivers, not pages owned by a fs.\\n\\nThis patch adds to can_map_frag() these additional checks:\\n\\n- Page must not be a compound one.\\n- page-\u003emapping must be NULL.\\n\\nThis fixes the panic reported by ZhangPeng.\\n\\nsyzbot was able to loopback packets built with sendfile(),\\nmapping pages owned by an ext4 file to TCP rx zerocopy.\\n\\nr3 = socket$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$dir(0xffffffffffffff9c, \u0026amp;(0x7f000) 00000c0)=\u0027./archivo0 \\\\x00\u0027, 0x181e42, 0x0)\"}]",
      "id": "CVE-2024-26640",
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      "published": "2024-03-18T11:15:11.043",
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      "vulnStatus": "Awaiting Analysis"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26640\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-18T11:15:11.043\",\"lastModified\":\"2025-03-10T17:01:43.500\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntcp: add sanity checks to rx zerocopy\\n\\nTCP rx zerocopy intent is to map pages initially allocated\\nfrom NIC drivers, not pages owned by a fs.\\n\\nThis patch adds to can_map_frag() these additional checks:\\n\\n- Page must not be a compound one.\\n- page-\u003emapping must be NULL.\\n\\nThis fixes the panic reported by ZhangPeng.\\n\\nsyzbot was able to loopback packets built with sendfile(),\\nmapping pages owned by an ext4 file to TCP rx zerocopy.\\n\\nr3 = socket$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\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.18\",\"versionEndExcluding\":\"5.10.210\",\"matchCriteriaId\":\"9FE2D9F9-7C0B-4363-8CBF-915813ECECBF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.149\",\"matchCriteriaId\":\"0D0465BB-4053-4E15-9137-6696EBAE90FD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.77\",\"matchCriteriaId\":\"0FA28946-970D-4F4D-B759-4E77B28809B5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.16\",\"matchCriteriaId\":\"A5007D6A-4B58-423A-8A3A-A1A656A263C8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.7.4\",\"matchCriteriaId\":\"848BC44C-9D25-4557-A50A-4B8BF310FA78\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B9F4EA73-0894-400F-A490-3A397AB7A517\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"056BD938-0A27-4569-B391-30578B309EE3\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1b8adcc0e2c584fec778add7777fe28e20781e60\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Mailing 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    "vulnrichment": {
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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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      "cveMetadata": "{\"cveId\": \"CVE-2024-26640\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:01:18.709Z\", \"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": "5.2"
    }
  }
}


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Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.