CVE-2026-53011
net/sched: taprio: fix use-after-free in advance_sched() on schedule switch
Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: fix use-after-free in advance_sched() on schedule switch In advance_sched(), when should_change_schedules() returns true, switch_schedules() is called to promote the admin schedule to oper. switch_schedules() queues the old oper schedule for RCU freeing via call_rcu(), but 'next' still points into an entry of the old oper schedule. The subsequent 'next->end_time = end_time' and rcu_assign_pointer(q->current_entry, next) are use-after-free. Fix this by selecting 'next' from the new oper schedule immediately after switch_schedules(), and using its pre-calculated end_time. setup_first_end_time() sets the first entry's end_time to base_time + interval when the schedule is installed, so the value is already correct. The deleted 'end_time = sched_base_time(admin)' assignment was also harmful independently: it would overwrite the new first entry's pre-calculated end_time with just base_time.
INFO
Published Date :
June 24, 2026, 5:17 p.m.
Last Modified :
July 14, 2026, 6:24 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 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel.
- Apply the provided patch.
- Recompile the kernel.
- Reboot the system.
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-2026-53011.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53011 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-2026-53011
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-2026-53011 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53011 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 CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.141 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.91 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.33 *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) 5.16 up to (excluding) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.2 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/0e62171df8ed4804d00db088f17eed06468233fa Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/105425b1969c5affe532713cfac1c0b320d7ac2b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1bd286fa3e21200133478ed523cc6a2788baf38a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3471874578160a28c171a607fa069f24062634b8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7256996e1ef553716817f3bfd077c2f3b48b582f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a8fc396519ef4f081bc545e88f61241728bb78d7 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b73235da5dde77ed1264f9767b62c28c9d71fd78 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/eee072fe16c646190d33ae69c9983d8de1562bf8 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
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': 'a3d43c0d56f1b94e74963a2fbadfb70126d92213', 'lessThan': 'a8fc396519ef4f081bc545e88f61241728bb78d7', 'versionType': 'git'}, {'status': 'affected', 'version': 'a3d43c0d56f1b94e74963a2fbadfb70126d92213', 'lessThan': '3471874578160a28c171a607fa069f24062634b8', 'versionType': 'git'}, {'status': 'affected', 'version': 'a3d43c0d56f1b94e74963a2fbadfb70126d92213', 'lessThan': '7256996e1ef553716817f3bfd077c2f3b48b582f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a3d43c0d56f1b94e74963a2fbadfb70126d92213', 'lessThan': 'eee072fe16c646190d33ae69c9983d8de1562bf8', 'versionType': 'git'}, {'status': 'affected', 'version': 'a3d43c0d56f1b94e74963a2fbadfb70126d92213', 'lessThan': '1bd286fa3e21200133478ed523cc6a2788baf38a', 'versionType': 'git'}, {'status': 'affected', 'version': 'a3d43c0d56f1b94e74963a2fbadfb70126d92213', 'lessThan': 'b73235da5dde77ed1264f9767b62c28c9d71fd78', 'versionType': 'git'}, {'status': 'affected', 'version': 'a3d43c0d56f1b94e74963a2fbadfb70126d92213', 'lessThan': '0e62171df8ed4804d00db088f17eed06468233fa', 'versionType': 'git'}, {'status': 'affected', 'version': 'a3d43c0d56f1b94e74963a2fbadfb70126d92213', 'lessThan': '105425b1969c5affe532713cfac1c0b320d7ac2b', 'versionType': 'git'}], 'programFiles': ['net/sched/sch_taprio.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.2', '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_taprio.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: fix use-after-free in advance_sched() on schedule switch In advance_sched(), when should_change_schedules() returns true, switch_schedules() is called to promote the admin schedule to oper. switch_schedules() queues the old oper schedule for RCU freeing via call_rcu(), but 'next' still points into an entry of the old oper schedule. The subsequent 'next->end_time = end_time' and rcu_assign_pointer(q->current_entry, next) are use-after-free. Fix this by selecting 'next' from the new oper schedule immediately after switch_schedules(), and using its pre-calculated end_time. setup_first_end_time() sets the first entry's end_time to base_time + interval when the schedule is installed, so the value is already correct. The deleted 'end_time = sched_base_time(admin)' assignment was also harmful independently: it would overwrite the new first entry's pre-calculated end_time with just base_time. Added Reference https://git.kernel.org/stable/c/0e62171df8ed4804d00db088f17eed06468233fa Added Reference https://git.kernel.org/stable/c/105425b1969c5affe532713cfac1c0b320d7ac2b Added Reference https://git.kernel.org/stable/c/1bd286fa3e21200133478ed523cc6a2788baf38a Added Reference https://git.kernel.org/stable/c/3471874578160a28c171a607fa069f24062634b8 Added Reference https://git.kernel.org/stable/c/7256996e1ef553716817f3bfd077c2f3b48b582f Added Reference https://git.kernel.org/stable/c/a8fc396519ef4f081bc545e88f61241728bb78d7 Added Reference https://git.kernel.org/stable/c/b73235da5dde77ed1264f9767b62c28c9d71fd78 Added Reference https://git.kernel.org/stable/c/eee072fe16c646190d33ae69c9983d8de1562bf8