tcp: fix a signed-integer-overflow bug in tcp_add_backlog()
Summary
| CVE | CVE-2022-50865 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-12-30 13:16:01 UTC |
| Updated | 2026-08-04 10:18:24 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.004580000 probability, percentile 0.374560000 (date 2026-08-06)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected c9c3321257e1b95be9b375f811fb250162af8d39 9d04b4d0feee12bce6bfe37f30d8e953d3c30368 git | Not specified |
| CNA | Linux | Linux | affected c9c3321257e1b95be9b375f811fb250162af8d39 4f23cb2be530785db284a685d1b1c30224d8a538 git | Not specified |
| CNA | Linux | Linux | affected c9c3321257e1b95be9b375f811fb250162af8d39 a85d39f14aa8a71e29cfb5eb5de02878a8779898 git | Not specified |
| CNA | Linux | Linux | affected c9c3321257e1b95be9b375f811fb250162af8d39 28addf029417d53b1df062b4c87feb7bc033cb5f git | Not specified |
| CNA | Linux | Linux | affected c9c3321257e1b95be9b375f811fb250162af8d39 ec791d8149ff60c40ad2074af3b92a39c916a03f git | Not specified |
| CNA | Linux | Linux | affected 4.9 | Not specified |
| CNA | Linux | Linux | unaffected 4.9 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.4.278 5.4.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.153 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.77 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.0.7 6.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/28addf029417d53b1df062b4c87feb7bc033cb5f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4f23cb2be530785db284a685d1b1c30224d8a538 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/a85d39f14aa8a71e29cfb5eb5de02878a8779898 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9d04b4d0feee12bce6bfe37f30d8e953d3c30368 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ec791d8149ff60c40ad2074af3b92a39c916a03f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.