CVE-2026-52984
net/sched: netem: fix queue limit check to include reordered packets
Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: netem: fix queue limit check to include reordered packets The queue limit check in netem_enqueue() uses q->t_len which only counts packets in the internal tfifo. Packets placed in sch->q by the reorder path (__qdisc_enqueue_head) are not counted, allowing the total queue occupancy to exceed sch->limit under reordering. Include sch->q.qlen in the limit check.
INFO
Published Date :
June 24, 2026, 5:17 p.m.
Last Modified :
July 14, 2026, 4:47 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel to include the fix for netem queue limit.
- Incorporate sch->q.qlen into the limit check.
- Ensure queue occupancy does not exceed the configured limit.
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-2026-52984.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-52984 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-2026-52984
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-2026-52984 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-52984 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.
-
Initial Analysis by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.13:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4.288 up to (excluding) 5.5 *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.10.232 up to (excluding) 5.10.258 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.15.175 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.1.121 up to (excluding) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.12.6 up to (excluding) 6.12.91 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13.1 up to (excluding) 6.18.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6.67 up to (excluding) 6.6.141 Added Reference Type kernel.org: https://git.kernel.org/stable/c/0f875d52db4c921da610e481b72f03cc82fdcb72 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/39a66e83ea41fe845631eeb8d326953de27d13f9 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4185701fcce6b426b6c3630b25330dddd9c47b0d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/54b5dbacd00dedffd5e2eed76de1c3839996b5e6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/74fcd8e127200a50ee22ba2b45c164722bdb9177 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/8450462eaf91d5d2a9e863507b16d18e814baef3 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/936a7dd87251f6f3e88983350833edf60fe6a80b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ef9a41b3870fb90577da5b2de5bd140022d4021e Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 24, 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': '216509dda290f6db92c816dd54b83c1df9da9e76', 'lessThan': '0f875d52db4c921da610e481b72f03cc82fdcb72', 'versionType': 'git'}, {'status': 'affected', 'version': 'c2047b0e216c8edce227d7c42f99ac2877dad0e4', 'lessThan': 'ef9a41b3870fb90577da5b2de5bd140022d4021e', 'versionType': 'git'}, {'status': 'affected', 'version': '10df49cfca73dfbbdb6c4150d859f7e8926ae427', 'lessThan': '74fcd8e127200a50ee22ba2b45c164722bdb9177', 'versionType': 'git'}, {'status': 'affected', 'version': '3824c5fad18eeb7abe0c4fc966f29959552dca3e', 'lessThan': '39a66e83ea41fe845631eeb8d326953de27d13f9', 'versionType': 'git'}, {'status': 'affected', 'version': '356078a5c55ec8d2061fcc009fb8599f5b0527f9', 'lessThan': '54b5dbacd00dedffd5e2eed76de1c3839996b5e6', 'versionType': 'git'}, {'status': 'affected', 'version': 'f8d4bc455047cf3903cd6f85f49978987dbb3027', 'lessThan': '8450462eaf91d5d2a9e863507b16d18e814baef3', 'versionType': 'git'}, {'status': 'affected', 'version': 'f8d4bc455047cf3903cd6f85f49978987dbb3027', 'lessThan': '936a7dd87251f6f3e88983350833edf60fe6a80b', 'versionType': 'git'}, {'status': 'affected', 'version': 'f8d4bc455047cf3903cd6f85f49978987dbb3027', 'lessThan': '4185701fcce6b426b6c3630b25330dddd9c47b0d', 'versionType': 'git'}, {'status': 'affected', 'version': '83c6ab12f08dcc09d4c5ac86fdb89736b28f1d31', 'versionType': 'git'}, {'status': 'affected', 'version': '5.10.232', 'lessThan': '5.10.258', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.15.175', 'lessThan': '5.15.209', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.1.121', 'lessThan': '6.1.175', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.6.67', 'lessThan': '6.6.141', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.12.6', 'lessThan': '6.12.91', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.4.288', 'lessThan': '5.5', 'versionType': 'semver'}], 'programFiles': ['net/sched/sch_netem.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.258', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.209', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.141', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.91', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.33', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.10', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sched/sch_netem.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: net/sched: netem: fix queue limit check to include reordered packets The queue limit check in netem_enqueue() uses q->t_len which only counts packets in the internal tfifo. Packets placed in sch->q by the reorder path (__qdisc_enqueue_head) are not counted, allowing the total queue occupancy to exceed sch->limit under reordering. Include sch->q.qlen in the limit check. Added Reference https://git.kernel.org/stable/c/0f875d52db4c921da610e481b72f03cc82fdcb72 Added Reference https://git.kernel.org/stable/c/39a66e83ea41fe845631eeb8d326953de27d13f9 Added Reference https://git.kernel.org/stable/c/4185701fcce6b426b6c3630b25330dddd9c47b0d Added Reference https://git.kernel.org/stable/c/54b5dbacd00dedffd5e2eed76de1c3839996b5e6 Added Reference https://git.kernel.org/stable/c/74fcd8e127200a50ee22ba2b45c164722bdb9177 Added Reference https://git.kernel.org/stable/c/8450462eaf91d5d2a9e863507b16d18e814baef3 Added Reference https://git.kernel.org/stable/c/936a7dd87251f6f3e88983350833edf60fe6a80b Added Reference https://git.kernel.org/stable/c/ef9a41b3870fb90577da5b2de5bd140022d4021e