7.5

CVE-2022-50865: tcp: fix a signed-integer-overflow bug in tcp_add_backlog()

Deferred
AliasesUBUNTU-CVE-2022-50865DEBIAN-CVE-2022-50865
Published 30-12-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-50865 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 44.7% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.53%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 1
RHSA-2023:6583RHSA-2026:1661RHSA-2026:1662RHSA-2026:1909RHSA-2026:1946RHSA-2026:2490

Timeline

  1. 30-12-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

45%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.53% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu119 products
  • linuxAll versions (No fix recorded) | < 5.4.0-192.212 | < 5.15.0-60.66
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1130.140 | < 5.15.0-1030.34
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.0.7-1
Linux1 product
  • linux≥ c9c3321257e1b95be9b375f811fb250162af8d39, < 9d04b4d0feee12bce6bfe37f30d8e953d3c30368 | ≥ c9c3321257e1b95be9b375f811fb250162af8d39, < 4f23cb2be530785db284a685d1b1c30224d8a538 | ≥ c9c3321257e1b95be9b375f811fb250162af8d39, < a85d39f14aa8a71e29cfb5eb5de02878a8779898 | ≥ c9c3321257e1b95be9b375f811fb250162af8d39, < 28addf029417d53b1df062b4c87feb7bc033cb5f | ≥ c9c3321257e1b95be9b375f811fb250162af8d39, < ec791d8149ff60c40ad2074af3b92a39c916a03f | 4.9

3 vendors · 121 products

References

9 links