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$dir(0xffffffffffffff9c, &(0x7f00000000c0)='./file0\x00', 0x181e42, 0x0)
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < f48bf9a83b1666d934247cb58a9887d7b3127b6f (git)
Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < 718f446e60316bf606946f7f42367d691d21541e (git)
Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < b383d4ea272fe5795877506dcce5aad1f6330e5e (git)
Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < d15cc0f66884ef2bed28c7ccbb11c102aa3a0760 (git)
Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < 1b8adcc0e2c584fec778add7777fe28e20781e60 (git)
Affected: 93ab6cc69162775201587cc9da00d5016dc890e2 , < 577e4432f3ac810049cb7e6b71f4d96ec7c6e894 (git)
Create a notification for this product.
Linux Linux Affected: 4.18
Unaffected: 0 , < 4.18 (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.77 , ≤ 6.1.* (semver)
Unaffected: 6.6.16 , ≤ 6.6.* (semver)
Unaffected: 6.7.4 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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Este parche a\u00f1ade a can_map_frag() estas comprobaciones adicionales: - La p\u00e1gina no debe ser compuesta. - p\u00e1gina-\u0026gt;mapeo debe ser NULL. 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page-\u003emapping must be NULL.\\n\\nThis fixes the panic reported by ZhangPeng.\\n\\nsyzbot was able to loopback packets built with sendfile(),\\nmapping pages owned by an ext4 file to TCP rx zerocopy.\\n\\nr3 = socket$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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  }
}


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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.