0.0
NA
CVE-2026-72326
net/sched: cake: reject overhead values that underflow length
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: cake: reject overhead values that underflow length CAKE accepts signed overhead values and stores them in an s16, but the adjusted packet length calculation uses unsigned arithmetic. A negative effective length can therefore wrap to a large value. Such configurations make rate accounting depend on integer wraparound rather than on the packet size userspace intended to model. A static netlink lower bound is not enough because packets reaching CAKE can be smaller than any reasonable manual-overhead allowance. Fold the signed overhead adjustment into the existing datapath MPU clamp so negative adjusted lengths are clamped before link-layer framing adjustments.
Details
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Address integer underflow in CAKE's packet length calculation by clamping negative adjusted lengths.
- Fold signed overhead adjustment into the datapath MPU clamp.
- Clamp negative adjusted lengths before link-layer framing.
- Apply vendor-provided patches for the Linux kernel.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72326.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72326 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72326
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72326 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72326 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'f511dd7bf6077aa7afbe72914520553fedaacbb4', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'e1df6cff03aad8c96e55a8b2a991e505c7a3ff6f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': '297f459865360b46a887667cbf3aac6a6f013841', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': '336c1e414fc0e9844d445174e8ada2a7dd8d1c4b', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'bcdf3a3664f7d2c4e37e155f30f72ef33f041804', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': '7aa0e64fea778a9e3df73e64da95367ff8ad2ea5', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'f1e7807df5bf2d42a40266430e9f82f37633cdcf', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'b7f97cae7ec1b6c3c32843c42be218690d310467', 'versionType': 'git'}], 'programFiles': ['net/sched/sch_cake.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sched/sch_cake.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'f511dd7bf6077aa7afbe72914520553fedaacbb4', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'e1df6cff03aad8c96e55a8b2a991e505c7a3ff6f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': '297f459865360b46a887667cbf3aac6a6f013841', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': '336c1e414fc0e9844d445174e8ada2a7dd8d1c4b', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'bcdf3a3664f7d2c4e37e155f30f72ef33f041804', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': '7aa0e64fea778a9e3df73e64da95367ff8ad2ea5', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'f1e7807df5bf2d42a40266430e9f82f37633cdcf', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'b7f97cae7ec1b6c3c32843c42be218690d310467', 'versionType': 'git'}], 'programFiles': ['net/sched/sch_cake.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sched/sch_cake.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'f511dd7bf6077aa7afbe72914520553fedaacbb4', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'e1df6cff03aad8c96e55a8b2a991e505c7a3ff6f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': '297f459865360b46a887667cbf3aac6a6f013841', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': '336c1e414fc0e9844d445174e8ada2a7dd8d1c4b', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'bcdf3a3664f7d2c4e37e155f30f72ef33f041804', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': '7aa0e64fea778a9e3df73e64da95367ff8ad2ea5', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'f1e7807df5bf2d42a40266430e9f82f37633cdcf', 'versionType': 'git'}, {'status': 'affected', 'version': 'a729b7f0bd5bf4919306556aed614438f5174537', 'lessThan': 'b7f97cae7ec1b6c3c32843c42be218690d310467', 'versionType': 'git'}], 'programFiles': ['net/sched/sch_cake.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sched/sch_cake.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: net/sched: cake: reject overhead values that underflow length CAKE accepts signed overhead values and stores them in an s16, but the adjusted packet length calculation uses unsigned arithmetic. A negative effective length can therefore wrap to a large value. Such configurations make rate accounting depend on integer wraparound rather than on the packet size userspace intended to model. A static netlink lower bound is not enough because packets reaching CAKE can be smaller than any reasonable manual-overhead allowance. Fold the signed overhead adjustment into the existing datapath MPU clamp so negative adjusted lengths are clamped before link-layer framing adjustments. Added Reference https://git.kernel.org/stable/c/297f459865360b46a887667cbf3aac6a6f013841 Added Reference https://git.kernel.org/stable/c/336c1e414fc0e9844d445174e8ada2a7dd8d1c4b Added Reference https://git.kernel.org/stable/c/7aa0e64fea778a9e3df73e64da95367ff8ad2ea5 Added Reference https://git.kernel.org/stable/c/b7f97cae7ec1b6c3c32843c42be218690d310467 Added Reference https://git.kernel.org/stable/c/bcdf3a3664f7d2c4e37e155f30f72ef33f041804 Added Reference https://git.kernel.org/stable/c/e1df6cff03aad8c96e55a8b2a991e505c7a3ff6f Added Reference https://git.kernel.org/stable/c/f1e7807df5bf2d42a40266430e9f82f37633cdcf Added Reference https://git.kernel.org/stable/c/f511dd7bf6077aa7afbe72914520553fedaacbb4
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.