CVE-2026-80588

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-80588
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80588.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-80588
Downstream
Published
2026-08-26T14:37:42.685Z
Modified
2026-08-28T03:47:29.265266259Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
mptcp: reclaim forward-allocated memory on RX path errors
Details

In the Linux kernel, the following vulnerability has been resolved:

mptcp: reclaim forward-allocated memory on RX path errors

After commit 9db5b3cec4ec ("mptcp: borrow forward memory from subflow"), errors in the receive path prior to queueing skbs into the receive queue do not trigger forward-allocated memory reclaiming.

Prevent forward memory from growing unboundedly in pathological drop scenarios by explicitly reclaiming memory when skbs are dropped.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80588.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
a84164847b1e0a106ebc46821e5d2f9b775c9dc8
Fixed
473f1a5ab2abc98dd9e74b95b9c23c66c47535cc
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
9db5b3cec4ec1c0cd3239689f5c8653d691a1754
Fixed
8277f48a06d3aa1441f6d0b6998ccc0360d30ed8
Fixed
41b49a8b914ec7dcb03eae93fb27f3c464078644
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
6.18.35
Fixed
6.18.46

Affected versions

v6.*
v6.18.35
v6.18.36
v6.18.37
v6.18.38
v6.18.39
v6.18.40
v6.18.41
v6.18.42
v6.18.43
v6.18.44
v6.18.45

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80588.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.18.46
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.1.10

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80588.json"