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CVE-2022-49587

15
FAUCET Score

CVE-2022-49587 is a data-race vulnerability in the Linux kernel's TCP implementation, specifically affecting how sysctl_tcp_notsent_lowat is read. This flaw impacts Linux kernel versions and could lead to a denial of service (DoS) due to concurrent changes during reading. With a CVSS score of 4.7 (Medium), it requires local access and high attack complexity, but does not impact confidentiality or integrity. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.12, < 4.9.325CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.10, < 4.14.290CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.15, < 4.19.254CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.20, < 5.4.208CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.5, < 5.10.134CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.7MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.0
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.19%
Probability of exploitation in next 30 days
EPSS Percentile
8.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0019 is in the 44th percentile among its peer group of 1,297 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.4 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-0:5.14.0-284.11.1.el9_2
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2022-49587Low

kernel: tcp: Fix a data-race around sysctl_tcp_notsent_lowat.

Feb 26, 2025

References

git.kernel.org / stable/c/0f75343584ee474303e17efe0610bdd170af1d13
Patch
git.kernel.org / stable/c/55be873695ed8912eb77ff46d1d1cadf028bd0f3
Patch
git.kernel.org / stable/c/62e56cfeb2ae4b53ae9ca24c80f54093250ce64a
Patch
git.kernel.org / stable/c/80d4d0c461674eea87f0977e12a2ecd334b9b79c
Patch
git.kernel.org / stable/c/91e21df688f8a75255ca9c459da39ac96300113a
Patch
git.kernel.org / stable/c/c1b85c5a34294f7444c13bf828e0e84b0a0eed85
Patch
git.kernel.org / stable/c/e9362a993886613ef0284c2a4911c6017c97d803
Patch
git.kernel.org / stable/c/fd6f1284e380c377932186042ff0b5c987fb2b92
Patch