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CVE-2022-50865 (GCVE-0-2022-50865)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:15 – Updated: 2026-08-05 08:59
VLAI
Title
tcp: fix a signed-integer-overflow bug in tcp_add_backlog()
Summary
In the Linux kernel, the following vulnerability has been resolved: tcp: fix a signed-integer-overflow bug in tcp_add_backlog() The type of sk_rcvbuf and sk_sndbuf in struct sock is int, and in tcp_add_backlog(), the variable limit is caculated by adding sk_rcvbuf, sk_sndbuf and 64 * 1024, it may exceed the max value of int and overflow. This patch reduces the limit budget by halving the sndbuf to solve this issue since ACK packets are much smaller than the payload.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 15:51 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c9c3321257e1b95be9b375f811fb250162af8d39 , < 9d04b4d0feee12bce6bfe37f30d8e953d3c30368 (git)
Affected: c9c3321257e1b95be9b375f811fb250162af8d39 , < 4f23cb2be530785db284a685d1b1c30224d8a538 (git)
Affected: c9c3321257e1b95be9b375f811fb250162af8d39 , < a85d39f14aa8a71e29cfb5eb5de02878a8779898 (git)
Affected: c9c3321257e1b95be9b375f811fb250162af8d39 , < 28addf029417d53b1df062b4c87feb7bc033cb5f (git)
Affected: c9c3321257e1b95be9b375f811fb250162af8d39 , < ec791d8149ff60c40ad2074af3b92a39c916a03f (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 5.4.278 , ≤ 5.4.* (semver)
Unaffected: 5.10.153 , ≤ 5.10.* (semver)
Unaffected: 5.15.77 , ≤ 5.15.* (semver)
Unaffected: 6.0.7 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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Tags
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.