[El-errata] ELSA-2026-50234 Important: Oracle Linux 8 Unbreakable Enterprise kernel security update

[Errata Announcements for Oracle Linux]

Oracle Linux Security Advisory ELSA-2026-50234

http://linux.oracle.com/errata/ELSA-2026-50234.html

The following updated rpms for Oracle Linux 8 have been uploaded to the Unbreakable Linux Network:


aarch64:
kernel-uek-5.4.17-2136.354.4.1.el8uek.aarch64.rpm
kernel-uek-debug-5.4.17-2136.354.4.1.el8uek.aarch64.rpm
kernel-uek-debug-devel-5.4.17-2136.354.4.1.el8uek.aarch64.rpm
kernel-uek-devel-5.4.17-2136.354.4.1.el8uek.aarch64.rpm
kernel-uek-doc-5.4.17-2136.354.4.1.el8uek.noarch.rpm


SRPMS:
http://oss.oracle.com/ol8/SRPMS-updates/kernel-uek-5.4.17-2136.354.4.1.el8uek.src.rpm

Related CVEs:

CVE-2025-68814
CVE-2026-23001
CVE-2026-23209




Description of changes:

[5.4.17-2136.354.4.1]
- Revert "rds: Drop rds conn in connect worker if not in down state." (Alok Tiwari)  [Orabug: 39200399]

[5.4.17-2136.354.4]
- macvlan: fix possible UAF in macvlan_forward_source() (Eric Dumazet)  [Orabug: 38887731]  {CVE-2026-23001}
- macvlan: Use 'hash' iterators to simplify code (Christophe JAILLET)  [Orabug: 38887731]
- macvlan: Add nodst option to macvlan type source (Jethro Beekman)  [Orabug: 38887731]
- macvlan: observe an RCU grace period in macvlan_common_newlink() error path (Eric Dumazet)  [Orabug: 38970510]
- macvlan: fix error recovery in macvlan_common_newlink() (Eric Dumazet)  [Orabug: 38970510]  {CVE-2026-23209}

[5.4.17-2136.354.3]
- io_uring: fix filename leak in __io_openat_prep() (Prithvi Tambewagh)  [Orabug: 39064937]  {CVE-2025-68814}
- rds: Drop rds conn in connect worker if not in down state. (Rohit Nair)  [Orabug: 39045035]

[5.4.17-2136.354.2]
- ext4/jbd2: skip sb flush when EIO happened (Wengang Wang) [Orabug: 38916908]
- jbd2: store more accurate errno in superblock (Wengang Wang) [Orabug: 38916908]
- ext4: save the error code which triggered an (Wengang Wang) [Orabug: 38916908]

[5.4.17-2136.354.1]
- genirq/cpuhotplug: Notify about affinity changes breaking the affinity mask (Imran Khan) [Orabug: 39001911]
- rds: Add state field to RDS trace logs. (Rohit Nair) [Orabug: 38870347]

[5.4.17-2136.353.3]
- xfrm: flush all states in xfrm_state_fini (Sabrina Dubroca) [Orabug: 38934000]
- xfrm: also call xfrm_state_delete_tunnel at destroy time for states that were never added (Sabrina Dubroca) [Orabug: 38934000,39004270] {CVE-2025-40256}
- Revert "xfrm: destroy xfrm_state synchronously on net exit path" (Sabrina Dubroca) [Orabug: 38934000]
- Revert "IB/mlx5: Implement clear counters" (Sharath Srinivasan) [Orabug: 38923520]
- Revert "IB/core: Implement clear counters" (Sharath Srinivasan) [Orabug: 38923520]
- Revert "ib/core: add SET_DEVICE_OP call for clear_hw_stats()" (Sharath Srinivasan) [Orabug: 38923520]
- fs: proc: inode: delay put_pid() by RCU (Stephen Brennan) [Orabug: 38766812]

[5.4.17-2136.353.2]
- Revert "perf/x86: Always store regs->ip in perf_callchain_kernel()" (Jiri Olsa) [Orabug: 38893604]
- xfrm: delete x->tunnel as we delete x (Sabrina Dubroca) [Orabug: 38730493,39016501] {CVE-2025-40215}

[5.4.17-2136.352.5]
- crypto: af_alg - Fix incorrect boolean values in af_alg_ctx (Eric Biggers) [Orabug: 38879907,38884602,39004445] {CVE-2025-40022}

[5.4.17-2136.352.4]
- arm64: pensando: Must boot Ortano kernel with spin-table (Rob Gardner) [Orabug: 38821197]

[5.4.17-2136.352.3]
- net/sched: adjust device watchdog timer to detect stopped queue at right time (Praveen Kumar Kannoju) [Orabug: 38340278]
- net/mlx5: Mark the mellanox graceful_period fix as out-of-tree change (Praveen Kumar Kannoju) [Orabug: 38252416]
- infiniband/xsigo: Replace BUG_ON with WARN_ON_ONCE. (Siddh Raman Pant) [Orabug: 38418469]
- infiniband/xsigo: xsvnic_main: Remove unused functions (Siddh Raman Pant) [Orabug: 38418469]
- infiniband/xsigo: xve_cm: Fix mixed code warning (Siddh Raman Pant) [Orabug: 38418469]
- infiniband/xsigo: xve_ethtool: Remove unused variable 'priv' (Siddh Raman Pant) [Orabug: 38418469]
- infiniband/xsigo: xve_ib: Fix misleading indentation (Siddh Raman Pant) [Orabug: 38418469]
- infiniband/xsigo: xve_ib: Fix mixed code warning (Siddh Raman Pant) [Orabug: 38418469]
- infiniband/xsigo: xve_verbs: Remove unused label 'out_free_pd' (Siddh Raman Pant) [Orabug: 38418469]
- infiniband/xsigo: xve_main: Remove unused function 'xve_napi_del' (Siddh Raman Pant) [Orabug: 38418469]
- infiniband/xsigo: xve_main: Fix mixed code warning (Siddh Raman Pant) [Orabug: 38418469]
- infiniband/xsigo: xve_main: Fix misleading indentation (Siddh Raman Pant) [Orabug: 38418469]
- inifinibad/xsigo: xsvnic_main: Remove unused variable 'xsvnic_ethtool_ops' (Siddh Raman Pant) [Orabug: 38418469]
- infiniband/xsigo: xscore_impl: Remove unused label 'err_pd' (Siddh Raman Pant) [Orabug: 38418469]
- rds: Fix jiffies type in struct rds_conn_path (Siddh Raman Pant) [Orabug: 38418727]
- kernel: sysctl: Remove unused variable 'zero' (Siddh Raman Pant) [Orabug: 38418727]
- crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg (Herbert Xu) [Orabug: 38537469,38855313] {CVE-2025-39964}
- RDMA/cm: Base cm_id destruction timeout on CMA values (Håkon Bugge) [Orabug: 38753622]
- x86/its: Build fails with CONFIG_MITIGATION_ITS=n (Alexandre Chartre) [Orabug: 38756954]