CVE-2026-53270
ipvs: clear the svc scheduler ptr early on edit
Description
In the Linux kernel, the following vulnerability has been resolved: ipvs: clear the svc scheduler ptr early on edit ip_vs_edit_service() while unbinding the old scheduler clears the svc->scheduler ptr after the scheduler module initiates RCU callbacks. This can cause packets to use the old scheduler at the time when svc->sched_data is already freed after RCU grace period. Fix it by clearing the ptr early in ip_vs_unbind_scheduler(), before the done_service method schedules any RCU callbacks. Also, if the new scheduler fails to initialize when replacing the old scheduler, try to restore the old scheduler while still returning the error code.
INFO
Published Date :
June 25, 2026, 9:16 a.m.
Last Modified :
July 8, 2026, 4:01 a.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
- Clear the svc scheduler pointer early in ip_vs_unbind_scheduler.
- Restore the old scheduler if the new one fails to initialize.
- Update the Linux kernel to the patched version.
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-2026-53270.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53270 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-2026-53270
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-2026-53270 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53270 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.
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Initial Analysis by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:4.2:rc8:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:4.2:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:4.2:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:4.2:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.1.11 up to (excluding) 4.2 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.18.23 up to (excluding) 3.19 *cpe:2.3:o:linux:linux_kernel:4.2:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.210 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.94 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.2.1 up to (excluding) 5.10.259 Added Reference Type kernel.org: https://git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8 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. 25, 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': '05f00505a89acd21f5d0d20f5797dfbc4cf85243', 'lessThan': 'd10730a1f2caf08088e0db1b19b242f3e6fa5f06', 'versionType': 'git'}, {'status': 'affected', 'version': '05f00505a89acd21f5d0d20f5797dfbc4cf85243', 'lessThan': 'e4feec3174036ba772006be74beee0efa09a9eb8', 'versionType': 'git'}, {'status': 'affected', 'version': '05f00505a89acd21f5d0d20f5797dfbc4cf85243', 'lessThan': '7d4f5004511757e3984901ffb412fcf858d80ed5', 'versionType': 'git'}, {'status': 'affected', 'version': '05f00505a89acd21f5d0d20f5797dfbc4cf85243', 'lessThan': 'c6376b9b1b4d2bad638256b1b3588e073344ae69', 'versionType': 'git'}, {'status': 'affected', 'version': '05f00505a89acd21f5d0d20f5797dfbc4cf85243', 'lessThan': '14e4689c113b4c06af1069364ade24fdd7055f33', 'versionType': 'git'}, {'status': 'affected', 'version': '05f00505a89acd21f5d0d20f5797dfbc4cf85243', 'lessThan': '25918720ba97f974a4f8d433b5a0132c5b43f6f3', 'versionType': 'git'}, {'status': 'affected', 'version': '05f00505a89acd21f5d0d20f5797dfbc4cf85243', 'lessThan': '19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03', 'versionType': 'git'}, {'status': 'affected', 'version': '05f00505a89acd21f5d0d20f5797dfbc4cf85243', 'lessThan': '193989cc6d80dd8e0460fb3992e69fa03bf0ff9b', 'versionType': 'git'}, {'status': 'affected', 'version': 'c803fddd2a95a70873c68dbff42d4c59fd2e674e', 'versionType': 'git'}, {'status': 'affected', 'version': '4ec8fb23158797affae7993c15beba080488482f', 'versionType': 'git'}, {'status': 'affected', 'version': '3.18.23', 'lessThan': '3.19', 'versionType': 'semver'}, {'status': 'affected', 'version': '4.1.11', 'lessThan': '4.2', 'versionType': 'semver'}], 'programFiles': ['include/net/ip_vs.h', 'net/netfilter/ipvs/ip_vs_ctl.c', 'net/netfilter/ipvs/ip_vs_sched.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.259', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['include/net/ip_vs.h', 'net/netfilter/ipvs/ip_vs_ctl.c', 'net/netfilter/ipvs/ip_vs_sched.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: ipvs: clear the svc scheduler ptr early on edit ip_vs_edit_service() while unbinding the old scheduler clears the svc->scheduler ptr after the scheduler module initiates RCU callbacks. This can cause packets to use the old scheduler at the time when svc->sched_data is already freed after RCU grace period. Fix it by clearing the ptr early in ip_vs_unbind_scheduler(), before the done_service method schedules any RCU callbacks. Also, if the new scheduler fails to initialize when replacing the old scheduler, try to restore the old scheduler while still returning the error code. Added Reference https://git.kernel.org/stable/c/14e4689c113b4c06af1069364ade24fdd7055f33 Added Reference https://git.kernel.org/stable/c/193989cc6d80dd8e0460fb3992e69fa03bf0ff9b Added Reference https://git.kernel.org/stable/c/19a9493faa4bf3c7bd0a386f30b60b1bb4a3da03 Added Reference https://git.kernel.org/stable/c/25918720ba97f974a4f8d433b5a0132c5b43f6f3 Added Reference https://git.kernel.org/stable/c/7d4f5004511757e3984901ffb412fcf858d80ed5 Added Reference https://git.kernel.org/stable/c/c6376b9b1b4d2bad638256b1b3588e073344ae69 Added Reference https://git.kernel.org/stable/c/d10730a1f2caf08088e0db1b19b242f3e6fa5f06 Added Reference https://git.kernel.org/stable/c/e4feec3174036ba772006be74beee0efa09a9eb8