Updated:
Description:
In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_erp: Fix object nesting warning ACLs in Spectrum-2 and newer ASICs can reside in the algorithmic TCAM (A-TCAM) or in the ordinary circuit TCAM (C-TCAM). The former can contain more ACLs (i.e., tc filters), but the number of masks in each region (i.e., tc chain) is limited. In order to mitigate the effects of the above limitation, the device allows filters to share a single mask if their masks only differ in up to 8 consecutive bits. For example, dst_ip/25 can be represented using dst_ip/24 with a delta of 1 bit. The C-TCAM does not have a limit on the number of masks being used (and therefore does not support mask aggregation), but can contain a limited number of filters. The driver uses the "objagg" library to perform the mask aggregation by passing it objects that consist of the filter's mask and whether the filter is to be inserted into the A-TCAM or the C-TCAM since filters in different TCAMs cannot share a mask. The set of created objects is dependent on the insertion order of the filters and is not necessarily optimal. Therefore, the driver will periodically ask the library to compute a more optimal set ("hints") by looking at all the existing objects. When the library asks the driver whether two objects can be aggregated the driver only compares the provided masks and ignores the A-TCAM / C-TCAM indication. This is the right thing to do since the goal is to move as many filters as possible to the A-TCAM. The driver also forbids two identical masks from being aggregated since this can only happen if one was intentionally put in the C-TCAM to avoid a conflict in the A-TCAM. The above can result in the following set of hints: H1: {mask X, A-TCAM} -> H2: {mask Y, A-TCAM} // X is Y + delta H3: {mask Y, C-TCAM} -> H4: {mask Z, A-TCAM} // Y is Z + delta After getting the hints from the library the driver will start migrating filters from one region to another while consulting the computed hints and instructing the device to perform a lookup in both regions during the transition. Assuming a filter with mask X is being migrated into the A-TCAM in the new region, the hints lookup will return H1. Since H2 is the parent of H1, the library will try to find the object associated with it and create it if necessary in which case another hints lookup (recursive) will be performed. This hints lookup for {mask Y, A-TCAM} will either return H2 or H3 since the driver passes the library an object comparison function that ignores the A-TCAM / C-TCAM indication. This can eventually lead to nested objects which are not supported by the library [1]. Fix by removing the object comparison function from both the driver and the library as the driver was the only user. That way the lookup will only return exact matches. I do not have a reliable reproducer that can reproduce the issue in a timely manner, but before the fix the issue would reproduce in several minutes and with the fix it does not reproduce in over an hour. Note that the current usefulness of the hints is limited because they include the C-TCAM indication and represent aggregation that cannot actually happen. This will be addressed in net-next. [1] WARNING: CPU: 0 PID: 153 at lib/objagg.c:170 objagg_obj_parent_assign+0xb5/0xd0 Modules linked in: CPU: 0 PID: 153 Comm: kworker/0:18 Not tainted 6.9.0-rc6-custom-g70fbc2c1c38b #42 Hardware name: Mellanox Technologies Ltd. MSN3700C/VMOD0008, BIOS 5.11 10/10/2018 Workqueue: mlxsw_core mlxsw_sp_acl_tcam_vregion_rehash_work RIP: 0010:objagg_obj_parent_assign+0xb5/0xd0 [...] Call Trace: <TASK> __objagg_obj_get+0x2bb/0x580 objagg_obj_get+0xe/0x80 mlxsw_sp_acl_erp_mask_get+0xb5/0xf0 mlxsw_sp_acl_atcam_entry_add+0xe8/0x3c0 mlxsw_sp_acl_tcam_entry_create+0x5e/0xa0 mlxsw_sp_acl_tcam_vchunk_migrate_one+0x16b/0x270 mlxsw_sp_acl_tcam_vregion_rehash_work+0xbe/0x510 process_one_work+0x151/0x370
CVSS3: 5.5
| OS | Vendor version | Errata |
|---|---|---|
| RHEL 8 | 4.18.0-553.27.1.el8_10 | RHSA-2024:8856 |
| Oracle Linux 8 | 4.18.0-553.27.1.el8_10 | ELSA-2024-8856 |
| Ubuntu 20.04 | 5.4.0-200.220 | USN-7088-1 |
| Oracle Linux 7 UEK 6 | 5.4.17-2136.336.5.1.el7uek | ELSA-2024-12780 |
| Oracle Linux 8 UEK 6 | 5.4.17-2136.336.5.1.el8uek | ELSA-2024-12780 |
| Ubuntu 20.04 AWS | 5.4.0-1135.145 | USN-7088-4 |
| AlmaLinux 8 | 4.18.0-553.27.1.el8_10 | ALSA-2024:8856 |
| Rocky Linux 8 | 4.18.0-553.27.1.el8_10 | RLSA-2024:8856 |
| Debian 11 | 5.10.226-1 | DLA-3912-1 |
| Ubuntu 22.04 | 5.15.0-125.135 | USN-7100-1 |
| Ubuntu 22.04 AWS | 5.15.0-1072.78 | USN-7100-2 |
| Ubuntu 22.04 Azure | 5.15.0-1075.84 | USN-7123-1 |
| Debian 11 cloud | 5.10.226-1 | DLA-3912-1 |
| Ubuntu 20.04 HWE AWS | 5.15.0-1072.78~20.04.1 | USN-7100-1 |
| Ubuntu 20.04 GCP | 5.4.0-1139.148 | USN-7088-1 |
| Amazon Linux 2 5.4 | 5.4.282-194.378.amzn2 | ALASKERNEL-5.4-2024-083 |
| Amazon Linux 2 5.10 | 5.10.224-212.876.amzn2 | ALASKERNEL-5.10-2024-069 |
| Oracle Linux 9 UEK 7 | 5.15.0-302.167.6.el9uek | ELSA-2024-12815 |
| Oracle Linux 8 UEK 7 | 5.15.0-302.167.6.el8uek | ELSA-2024-12815 |
| Ubuntu 24.04 | 6.8.0-50.51 | USN-7154-1 |
| OS | Original kernel version | State |
|---|---|---|
| Ubuntu 18.04 HWE Focal | |
Planned |
| RHEL 8 |
4.18.0-193.1.2.el8_2
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4.18.0-193.13.2.el8_2
4.18.0-193.14.3.el8_2
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4.18.0-193.6.3.el8_2
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4.18.0-240.1.1.el8_3
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4.18.0-425.19.2.el8_7
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4.18.0-477.10.1.el8_8
4.18.0-477.13.1.el8_8
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4.18.0-553.22.1.el8_10
4.18.0-553.5.1.el8_10
4.18.0-553.8.1.el8_10
4.18.0-553.el8_10
4.18.0-147.0.2.el8_1
4.18.0-147.0.3.el8_1
4.18.0-147.3.1.el8_1
4.18.0-147.5.1.el8_1
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4.18.0-372.19.1.el8_6
4.18.0-372.26.1.el8_6
4.18.0-372.32.1.el8_6
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4.18.0-425.10.1.el8_7
4.18.0-425.13.1.el8_7
4.18.0-477.21.1.el8_8
4.18.0-477.27.1.el8_8
4.18.0-513.11.1.el8_9
4.18.0-513.18.1.el8_9
4.18.0-513.24.1.el8_9
4.18.0-513.5.1.el8_9
4.18.0-513.9.1.el8_9
4.18.0-553.16.1.el8_10
|
Released |
| Oracle Linux 8 |
4.18.0-147.0.2.el8_1
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4.18.0-147.0.3.el8_1
4.18.0-147.3.1.el8_1
4.18.0-147.5.1.el8_1
4.18.0-147.8.1.el8_1
4.18.0-147.el8
4.18.0-193.1.2.el8_2
4.18.0-193.13.2.el8_2
4.18.0-193.14.3.el8_2
4.18.0-193.19.1.el8_2
4.18.0-193.28.1.el8_2
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4.18.0-240.1.1.el8_3
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4.18.0-372.13.1.0.1.el8_6
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4.18.0-372.26.1.0.1.el8_6
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4.18.0-477.15.1.el8_8
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4.18.0-513.11.0.1.el8_9
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4.18.0-513.18.0.2.el8_9
4.18.0-513.18.1.0.1.el8_9
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4.18.0-553.el8_10
4.18.0-477.10.1.el8_8
4.18.0-477.13.1.el8_8
|
Released |
| CloudLinux OS 8 |
4.18.0-147.0.3.lve.el8
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4.18.0-147.3.1.el8.lve.1
4.18.0-147.8.1.el8.lve.1
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4.18.0-193.28.1.lve1.el8
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4.18.0-553.8.1.lve.el8
4.18.0-553.lve.el8
|
Released |
| CloudLinux OS 7h |
4.18.0-147.0.3.el7h.lve
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4.18.0-147.0.3.el7h
4.18.0-147.3.1.el7h.lve.1
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4.18.0-193.28.1.lve1.el7h
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4.18.0-372.26.1.lve.1.el7h
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4.18.0-553.lve.el7h
|
Released |
| Ubuntu 20.04 | |
Planned |
| Oracle Linux 7 UEK 6 |
5.4.17-2136.334.6.1.el7uek
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5.4.17-2136.334.6.el7uek
5.4.17-2136.335.4.1.el7uek
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5.4.17-2136.325.5.el7uek
5.4.17-2136.326.6.1.el7uek
5.4.17-2136.326.6.el7uek
5.4.17-2136.327.2.el7uek
5.4.17-2136.328.3.el7uek
5.4.17-2136.329.3.1.el7uek
5.4.17-2136.329.3.2.el7uek
5.4.17-2136.330.7.1.el7uek
5.4.17-2136.330.7.4.el7uek
5.4.17-2136.330.7.5.el7uek
5.4.17-2136.331.7.el7uek
5.4.17-2136.332.5.2.el7uek
5.4.17-2136.333.5.1.el7uek
5.4.17-2136.333.5.el7uek
5.4.17-2136.335.4.el7uek
5.4.17-2102.200.13.el7uek
5.4.17-2102.201.3.el7uek
5.4.17-2102.202.5.el7uek
|
Released |
| Oracle Linux 8 UEK 6 |
5.4.17-2011.0.7.el8uek
show all
hide all
5.4.17-2011.1.2.el8uek
5.4.17-2011.2.2.el8uek
5.4.17-2011.3.2.1.el8uek
5.4.17-2011.4.4.el8uek
5.4.17-2011.4.6.el8uek
5.4.17-2011.5.3.el8uek
5.4.17-2011.6.2.el8uek
5.4.17-2011.7.4.el8uek
5.4.17-2036.100.6.1.el8uek
5.4.17-2036.101.2.el8uek
5.4.17-2036.102.0.2.el8uek
5.4.17-2036.103.3.1.el8uek
5.4.17-2036.103.3.el8uek
5.4.17-2036.104.4.el8uek
5.4.17-2036.104.5.el8uek
5.4.17-2102.200.13.el8uek
5.4.17-2102.201.3.el8uek
5.4.17-2102.202.5.el8uek
5.4.17-2102.203.5.el8uek
5.4.17-2102.203.6.el8uek
5.4.17-2102.204.4.2.el8uek
5.4.17-2102.204.4.3.el8uek
5.4.17-2102.204.4.4.el8uek
5.4.17-2102.205.7.2.el8uek
5.4.17-2102.205.7.3.el8uek
5.4.17-2102.206.1.el8uek
5.4.17-2136.300.7.el8uek
5.4.17-2136.301.1.2.el8uek
5.4.17-2136.301.1.3.el8uek
5.4.17-2136.301.1.4.el8uek
5.4.17-2136.302.6.1.el8uek
5.4.17-2136.302.7.2.1.el8uek
5.4.17-2136.302.7.2.2.el8uek
5.4.17-2136.302.7.2.3.el8uek
5.4.17-2136.302.7.2.el8uek
5.4.17-2136.304.4.1.el8uek
5.4.17-2136.304.4.2.el8uek
5.4.17-2136.304.4.3.el8uek
5.4.17-2136.304.4.4.el8uek
5.4.17-2136.304.4.5.el8uek
5.4.17-2136.305.5.3.el8uek
5.4.17-2136.305.5.4.el8uek
5.4.17-2136.305.5.5.el8uek
5.4.17-2136.306.1.3.el8uek
5.4.17-2136.307.3.1.el8uek
5.4.17-2136.307.3.2.el8uek
5.4.17-2136.307.3.4.el8uek
5.4.17-2136.307.3.5.el8uek
5.4.17-2136.307.3.6.el8uek
5.4.17-2136.308.7.el8uek
5.4.17-2136.308.9.el8uek
5.4.17-2136.309.4.el8uek
5.4.17-2136.309.5.1.el8uek
5.4.17-2136.309.5.el8uek
5.4.17-2136.310.7.1.el8uek
5.4.17-2136.310.7.el8uek
5.4.17-2136.311.6.1.el8uek
5.4.17-2136.311.6.el8uek
5.4.17-2136.312.3.4.el8uek
5.4.17-2136.313.6.el8uek
5.4.17-2136.314.6.2.el8uek
5.4.17-2136.314.6.3.el8uek
5.4.17-2136.315.5.8.el8uek
5.4.17-2136.315.5.el8uek
5.4.17-2136.316.7.el8uek
5.4.17-2136.317.5.3.el8uek
5.4.17-2136.317.5.5.el8uek
5.4.17-2136.318.7.1.el8uek
5.4.17-2136.318.7.2.el8uek
5.4.17-2136.319.1.2.el8uek
5.4.17-2136.319.1.3.el8uek
5.4.17-2136.319.1.4.el8uek
5.4.17-2136.320.7.1.el8uek
5.4.17-2136.320.7.el8uek
5.4.17-2136.321.4.1.el8uek
5.4.17-2136.321.4.el8uek
5.4.17-2136.322.6.2.el8uek
5.4.17-2136.322.6.3.el8uek
5.4.17-2136.322.6.4.el8uek
5.4.17-2136.322.6.5.el8uek
5.4.17-2136.323.8.1.el8uek
5.4.17-2136.323.8.2.el8uek
5.4.17-2136.323.8.el8uek
5.4.17-2136.324.5.2.el8uek
5.4.17-2136.324.5.3.el8uek
5.4.17-2136.325.5.1.el8uek
5.4.17-2136.325.5.el8uek
5.4.17-2136.326.6.1.el8uek
5.4.17-2136.326.6.el8uek
5.4.17-2136.327.2.el8uek
5.4.17-2136.328.3.el8uek
5.4.17-2136.329.3.1.el8uek
5.4.17-2136.329.3.2.el8uek
5.4.17-2136.330.7.1.el8uek
5.4.17-2136.330.7.4.el8uek
5.4.17-2136.330.7.5.el8uek
5.4.17-2136.331.7.el8uek
5.4.17-2136.332.5.2.el8uek
5.4.17-2136.333.5.1.el8uek
5.4.17-2136.333.5.el8uek
5.4.17-2136.334.6.1.el8uek
5.4.17-2136.334.6.el8uek
5.4.17-2136.335.4.1.el8uek
5.4.17-2136.335.4.el8uek
|
Released |
| Ubuntu 18.04 AWS Focal | |
Planned |
| Ubuntu 18.04 Azure Focal | |
Will Not Fix |
| Ubuntu 20.04 AWS | |
Planned |
| AlmaLinux 8 |
4.18.0-240.15.1.el8_3
show all
hide all
4.18.0-240.22.1.el8_3
4.18.0-240.el8
4.18.0-305.10.2.el8_4
4.18.0-305.12.1.el8_4
4.18.0-305.17.1.el8_4
4.18.0-305.19.1.el8_4
4.18.0-305.25.1.el8_4
4.18.0-305.3.1.el8_4
4.18.0-305.7.1.el8_4
4.18.0-305.el8
4.18.0-348.12.2.el8_5
4.18.0-348.2.1.el8_5
4.18.0-348.20.1.el8_5
4.18.0-348.23.1.el8_5
4.18.0-348.7.1.el8_5
4.18.0-348.el8
4.18.0-372.13.1.el8_6
4.18.0-372.16.1.el8_6
4.18.0-372.19.1.el8_6
4.18.0-372.26.1.el8_6
4.18.0-372.32.1.el8_6
4.18.0-372.9.1.el8
4.18.0-425.10.1.el8_7
4.18.0-425.13.1.el8_7
4.18.0-425.19.2.el8_7
4.18.0-425.3.1.el8
4.18.0-477.10.1.el8_8
4.18.0-477.13.1.el8_8
4.18.0-477.15.1.el8_8
4.18.0-477.21.1.el8_8
4.18.0-477.27.1.el8_8
4.18.0-477.27.2.el8_8
4.18.0-513.11.1.el8_9
4.18.0-513.18.1.el8_9
4.18.0-513.18.2.el8_9
4.18.0-513.24.1.el8_9
4.18.0-513.5.1.el8_9
4.18.0-513.9.1.el8_9
4.18.0-553.16.1.el8_10
4.18.0-553.22.1.el8_10
4.18.0-553.5.1.el8_10
4.18.0-553.8.1.el8_10
4.18.0-553.el8_10
|
Released |
| Rocky Linux 8 |
4.18.0-305.10.2.el8_4
show all
hide all
4.18.0-305.12.1.el8_4
4.18.0-305.17.1.el8_4
4.18.0-305.19.1.el8_4
4.18.0-305.25.1.el8_4
4.18.0-305.3.1.el8_4
4.18.0-305.7.1.el8_4
4.18.0-348.12.2.el8_5
4.18.0-348.2.1.el8_5
4.18.0-348.20.1.el8_5
4.18.0-348.23.1.el8_5
4.18.0-348.7.1.el8_5
4.18.0-372.13.1.el8_6
4.18.0-372.16.1.el8_6.0.1
4.18.0-372.16.1.el8_6
4.18.0-372.19.1.el8_6
4.18.0-372.26.1.el8_6
4.18.0-372.32.1.el8_6
4.18.0-372.9.1.el8
4.18.0-425.10.1.el8_7
4.18.0-425.13.1.el8_7
4.18.0-425.19.2.el8_7
4.18.0-425.3.1.el8
4.18.0-477.10.1.el8_8
4.18.0-477.13.1.el8_8
4.18.0-477.15.1.el8_8
4.18.0-477.21.1.el8_8
4.18.0-477.27.1.el8_8
4.18.0-513.11.1.el8_9.0.1
4.18.0-513.11.1.el8_9
4.18.0-513.18.1.el8_9
4.18.0-513.24.1.el8_9
4.18.0-513.5.1.el8_9
4.18.0-513.9.1.el8_9
4.18.0-553.16.1.el8_10
4.18.0-553.22.1.el8_10
4.18.0-553.5.1.el8_10
4.18.0-553.8.1.el8_10
4.18.0-553.el8_10
|
Released |
| Debian 11 | |
Planned |
| Ubuntu 22.04 | |
Planned |
| Ubuntu 22.04 AWS | |
Planned |
| Ubuntu 22.04 Azure | |
Planned |
| Debian 11 cloud | |
Planned |
| Ubuntu 20.04 HWE AWS | |
Planned |
| Ubuntu 20.04 GCP | |
Planned |
| Amazon Linux 2 5.4 |
5.4.247-162.350.amzn2
show all
hide all
5.4.249-163.359.amzn2
5.4.250-166.369.amzn2
5.4.253-167.359.amzn2
5.4.254-169.358.amzn2
5.4.254-170.358.amzn2
5.4.257-170.359.amzn2
5.4.258-171.360.amzn2
5.4.259-173.361.amzn2
5.4.261-174.360.amzn2
5.4.265-176.364.amzn2
5.4.266-178.365.amzn2
5.4.268-181.368.amzn2
5.4.268-181.370.amzn2
5.4.269-183.369.amzn2
5.4.271-184.369.amzn2
5.4.272-185.370.amzn2
5.4.273-186.370.amzn2
5.4.274-187.369.amzn2
5.4.275-189.375.amzn2
5.4.276-189.376.amzn2
5.4.277-190.375.amzn2
5.4.278-191.377.amzn2
5.4.279-193.377.amzn2
5.4.281-193.378.amzn2
5.4.105-48.177.amzn2
5.4.110-54.182.amzn2
5.4.110-54.189.amzn2
5.4.117-58.216.amzn2
5.4.149-73.259.amzn2
5.4.156-83.273.amzn2
5.4.162-86.275.amzn2
5.4.172-90.336.amzn2
5.4.176-91.338.amzn2
5.4.181-99.354.amzn2
5.4.186-102.354.amzn2
5.4.188-104.359.amzn2
5.4.190-107.353.amzn2
5.4.196-108.356.amzn2
5.4.209-116.367.amzn2
5.4.217-126.408.amzn2
5.4.219-126.411.amzn2
5.4.226-129.415.amzn2
5.4.228-131.415.amzn2
5.4.228-132.418.amzn2
5.4.231-137.341.amzn2
5.4.235-144.344.amzn2
5.4.238-148.347.amzn2
5.4.241-150.347.amzn2
5.4.242-155.348.amzn2
5.4.242-156.349.amzn2
5.4.242-159.350.amzn2
5.4.247-161.349.amzn2
|
Released |
| Amazon Linux 2 5.10 |
5.10.223-212.873.amzn2
show all
hide all
5.10.199-190.747.amzn2
5.10.201-191.748.amzn2
5.10.205-195.804.amzn2
5.10.205-195.807.amzn2
5.10.209-198.812.amzn2
5.10.209-198.858.amzn2
5.10.210-201.852.amzn2
5.10.210-201.855.amzn2
5.10.213-201.855.amzn2
5.10.214-202.855.amzn2
5.10.215-203.850.amzn2
5.10.216-204.855.amzn2
5.10.217-205.860.amzn2
5.10.218-206.860.amzn2
5.10.218-208.862.amzn2
5.10.219-208.866.amzn2
5.10.75-79.358.amzn2
5.10.82-83.359.amzn2
5.10.96-90.460.amzn2
5.10.112-108.499.amzn2
5.10.118-111.515.amzn2
5.10.126-117.518.amzn2
5.10.130-118.517.amzn2
5.10.135-122.509.amzn2
5.10.144-127.601.amzn2
5.10.147-133.644.amzn2
5.10.149-133.644.amzn2
5.10.155-138.670.amzn2
5.10.157-139.675.amzn2
5.10.162-141.675.amzn2
5.10.165-143.735.amzn2
5.10.167-147.601.amzn2
5.10.173-154.642.amzn2
5.10.176-157.645.amzn2
5.10.177-158.645.amzn2
5.10.178-162.673.amzn2
5.10.179-166.674.amzn2
5.10.179-168.710.amzn2
5.10.179-171.711.amzn2
5.10.184-174.730.amzn2
5.10.184-175.731.amzn2
5.10.184-175.749.amzn2
5.10.186-179.751.amzn2
5.10.192-182.736.amzn2
5.10.192-183.736.amzn2
5.10.196-185.743.amzn2
5.10.197-186.748.amzn2
5.10.198-187.748.amzn2
5.10.220-209.867.amzn2
5.10.220-209.869.amzn2
5.10.223-211.872.amzn2
|
Released |
| Oracle Linux 9 UEK 7 | |
Planned |
| Oracle Linux 8 UEK 7 | |
Planned |
| Debian 12 | |
Planned |
| Ubuntu 24.04 | |
Planned |