[El-errata] ELSA-2026-500573 Important: Oracle Linux 7 Unbreakable Enterprise kernel security update

Tue Nov 3 14:42:02 UTC 2026

Oracle Linux Security Advisory ELSA-2026-500573

http://linux.oracle.com/errata/ELSA-2026-500573.html

The following updated rpms for Oracle Linux 7 have been uploaded to the Unbreakable Linux Network:

x86_64:
kernel-uek-5.4.17-2136.361.4.el7uek.x86_64.rpm
kernel-uek-container-5.4.17-2136.361.4.el7uek.x86_64.rpm
kernel-uek-container-debug-5.4.17-2136.361.4.el7uek.x86_64.rpm
kernel-uek-debug-5.4.17-2136.361.4.el7uek.x86_64.rpm
kernel-uek-debug-devel-5.4.17-2136.361.4.el7uek.x86_64.rpm
kernel-uek-devel-5.4.17-2136.361.4.el7uek.x86_64.rpm
kernel-uek-doc-5.4.17-2136.361.4.el7uek.noarch.rpm
kernel-uek-tools-5.4.17-2136.361.4.el7uek.x86_64.rpm

SRPMS:
http://oss.oracle.com/ol7/SRPMS-updates/kernel-uek-5.4.17-2136.361.4.el7uek.src.rpm

Related CVEs:

CVE-2026-23356
CVE-2026-74580
CVE-2026-98432
CVE-2026-99999

Description of changes:

[5.4.17-2136.361.4]
- vhost-scsi: zero misaligned I/O bounce pages (Shubham Antil)  [Orabug: 40193932]

[5.4.17-2136.361.3]
- KVM: x86: Use active memslots for the per-vCPU MMIO cache (Jinu Kim)  [Orabug: 40180571]
- drbd: fix "LOGIC BUG" in drbd_al_begin_io_nonblock() (Lars Ellenberg)  [Orabug: 39130967]  {CVE-2026-23356}
- rds: cong: fix race while clearing rs_cong_mask (Anand Khoje)  [Orabug: 39519861]
- hugetlbfs: hold trunc_rwsem during hugepage migration (Stephen Brennan)  [Orabug: 39541934]
- ipv4: validate checksum_start before completing checksum (Michael S. Tsirkin)  [Orabug: 40165812]  {CVE-2026-99999}
- netfilter: nfnetlink_queue: unbreak SCTP traffic (Antonio Ojea)  [Orabug: 40165812]
- net: add inline function skb_csum_is_sctp (Xin Long)  [Orabug: 40165812]
- ipv4: free inet_opt and ireq_opt after an RCU grace period (Eric Dumazet)  [Orabug: 40165790]  {CVE-2026-98432}
- vhost: reset the vring metadata cache on vring reconfiguration (Jun Yang)  [Orabug: 39917526]  {CVE-2026-74580}

[5.4.17-2136.361.2]
- ionic: serialize hardware timestamp Tx queue access (Joe Dobosenski)  [Orabug: 40061822]

[5.4.17-2136.361.1]
- net/mlx5: Set parent device before health polling (Manjunath Patil)  [Orabug: 39208695]

[5.4.17-2136.360.3]
- IB/mlx4: delete allocated id_map_entry while sending REJ (Praveen Kumar Kannoju)  [Orabug: 39999072]
- net: tun: bound receive headroom (Asim Viladi Oglu Manizada)  [Orabug: 40020673]  {CVE-2026-81000}
- xfrm: ah6: validate routing header segments_left (Asim Viladi Oglu Manizada)  [Orabug: 39982188]  {CVE-2026-80844}
- inet: frags: strip GSO state from fragments before reassembly (Xinyang Ge)  [Orabug: 39972532]  {CVE-2026-80590}
- sctp: prevent peer transport count overflow (Asim Viladi Oglu Manizada)  [Orabug: 39886843]  {CVE-2026-74469}
- pppoe: reload header pointer after dev_hard_header() (Asim Viladi Oglu Manizada)  [Orabug: 39859408]  {CVE-2026-68121}

[5.4.17-2136.360.2]
- Revert "net/mlx5: Add poll-eq API to be used by ULP's" (Praveen Kumar Kannoju)  [Orabug: 39764468]

[5.4.17-2136.360.1]
- x86/alternatives: Guard struct alt_instr kABI layout (Saeed Mirzamohammadi) [Orabug: 39860383]
- crypto: ecc - Fix carry overflow in vli multiplication (Anastasia Tishchenko) [Orabug: 39785911] {CVE-2026-64313}
- crypto: pcrypt - restore callback for non-parallel fallback (Ruijie Li) [Orabug: 39785907] {CVE-2026-64312}
- crypto: drbg - Fix returning success on failure in CTR_DRBG (Eric Biggers) [Orabug: 39785894] {CVE-2026-64306}
- KVM: x86: Use scratch field in MMIO fragment to hold small write values (Sean Christopherson) [Orabug: 39273524] {CVE-2026-31588}
- xfrm: clear trailing padding in build_polexpire() (Yasuaki Torimaru) [Orabug: 39262403] {CVE-2026-31664}
- tipc: fix bc_ackers underflow on duplicate GRP_ACK_MSG (Oleh Konko) [Orabug: 39262395] {CVE-2026-31662}
- netfilter: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp() (Lukas Johannes Möller) [Orabug: 39167519] {CVE-2026-23457}
- netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (Jenny Guanni Qu) [Orabug: 39167511] {CVE-2026-23455}

[5.4.17-2136.359.3]
- Partial revert of "x86/alternatives: Optimize optimize_nops()" (Harshit Mogalapalli) [Orabug: 39866546]
- Revert "x86/alternatives: Add alt_instr.flags" (Harshit Mogalapalli) [Orabug: 39866546]
- x86/bugs: Make Safe-RET robust against interrupt injection (Borislav Petkov) [Orabug: 39784513,39853776] {CVE-2026-68480}
- x86/alternatives: Disable interrupts and sync when optimizing NOPs in place (Thomas Gleixner) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternative: Support relocations in alternatives (Peter Zijlstra) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternative: Make debug-alternative selective (Peter Zijlstra) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternatives: Add alt_instr.flags (Borislav Petkov) [Orabug: 39784513] {CVE-2026-68480}
- x86/asm: Provide ALTERNATIVE_3 (Peter Zijlstra) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternative: Optimize single-byte NOPs at an arbitrary position (Borislav Petkov) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternative: Align insn bytes vertically (Borislav Petkov) [Orabug: 39784513] {CVE-2026-68480}
(H Peter Anvin) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternatives: Optimize optimize_nops() (Peter Zijlstra) [Orabug: 39784513] {CVE-2026-68480}
- x86: Add insn_decode_kernel() (Peter Zijlstra) [Orabug: 39784513] {CVE-2026-68480}
- x86/insn: Add an insn_decode() API (Borislav Petkov) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternative: Use ALTERNATIVE_TERNARY() in _static_cpu_has() (Juergen Gross) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternative: Support ALTERNATIVE_TERNARY (Juergen Gross) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternative: Merge include files (Juergen Gross) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternative: Drop unused feature parameter from ALTINSTR_REPLACEMENT() (Juergen Gross) [Orabug: 39784513] {CVE-2026-68480}
- x86/insn: Support big endian cross-compiles (Martin Schwidefsky) [Orabug: 39784513] {CVE-2026-68480}
- x86/tools: Use tools headers for instruction decoder selftests (Vasily Gorbik) [Orabug: 39784513] {CVE-2026-68480}
- tools headers: Get tools's linux/compiler.h closer to the kernel's (Arnaldo Carvalho de Melo) [Orabug: 39784513] {CVE-2026-68480}
- perf build: Allow nested externs to enable BUILD_BUG() usage (Vasily Gorbik) [Orabug: 39784513] {CVE-2026-68480}
- objtool: Allow nested externs to enable BUILD_BUG() (Vasily Gorbik) [Orabug: 39784513] {CVE-2026-68480}
- objtool: Make relocation in alternative handling arch dependent (Julien Thierry) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternatives: Add pr_fmt() to debug macros (Borislav Petkov) [Orabug: 39784513] {CVE-2026-68480}
- tools headers: Adopt verbatim copy of compiletime_assert() from kernel sources (Arnaldo Carvalho de Melo) [Orabug: 39784513] {CVE-2026-68480}
- x86/alternatives: Teach text_poke_bp() to emulate instructions (Peter Zijlstra) [Orabug: 39784513] {CVE-2026-68480}
- tools headers: Synchronize linux/bits.h with the kernel sources (Arnaldo Carvalho de Melo) [Orabug: 39784513] {CVE-2026-68480}
- net/rds: restrict RDS_INFO dumps to caller netns (Praveen Kumar Kannoju) [Orabug: 39681637]

[5.4.17-2136.359.2]
- net: tap: set skb->dev before parsing virtio net header in tap_get_user_xdp() (Dongli Zhang) [Orabug: 39558751,39919265] {CVE-2026-74684}
- rds: tcp: fix uninit-value in __inet_bind (Tabrez Ahmed) [Orabug: 39668203]
- rds: tcp: cleanup if kmem_cache_alloc fails in rds_tcp_conn_alloc() (Sowmini Varadhan) [Orabug: 39668203]
- net/rds: harden rds_rm_size (Manjunath Patil) [Orabug: 39812534]
- rds: ib: move gc_count reset before free_percpu (Manjunath Patil) [Orabug: 39818510]
- rds: fix lfstack_pop_all sequence reset (Manjunath Patil) [Orabug: 39818510]

[5.4.17-2136.359.1]
- KVM: arm64: Make nVHE ASLR conditional on RANDOMIZE_BASE (David Brazdil) [Orabug: 39374251]
- arm64: kvm: Fix IDMAP overlap with HYP VA (Russell King) [Orabug: 39374251]
- arm64: KVM: Invoke compute_layout() before alternatives are applied (Sebastian Andrzej Siewior) [Orabug: 39374251]
- ocfs2: fix possible deadlock between unlink and dio_end_io_write (Joseph Qi) [Orabug: 39273589] {CVE-2026-31598}
- fs/ocfs2: fix comments mentioning i_mutex (Hongnan Li) [Orabug: 39273589] {CVE-2026-31598}
- xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete (Michal Kosiorek) [Orabug: 39460235] {CVE-2026-46116}
- net/rds: zero per-item info buffer before handing it to visitors (Michael Bommarito) [Orabug: 39621716,39638198] {CVE-2026-52995}
- uek: kabi: update x86_64 kABI files for a new symbol (Saeed Mirzamohammadi) [Orabug: 39651636]
- IB/rxe: use rxe_drop_ref to release rxe_pd (Wengang Wang) [Orabug: 39674348]
- IB/uverbs: enhance authorization checks for ib_uverbs_share_pd() (Wengang Wang) [Orabug: 39674348]
- fs/binfmt_elf: validate reserved VA ELF notes (Jianfeng Wang) [Orabug: 39681044]
- mm: preserve page-table boundaries for reserved VA mappings (Jianfeng Wang) [Orabug: 39681044]
- mm: enforce max_map_count for reserved VA mappings (Jianfeng Wang) [Orabug: 39681044]
- xen/ovmapi: terminate values passed to xenbus_write (Joe Jin) [Orabug: 39726701]
- xen/ovmapi: free queued events on release (Joe Jin) [Orabug: 39726701]
- xen/ovmapi: prevent duplicate app registration (Joe Jin) [Orabug: 39726701]
- xen/ovmapi: avoid raw user pointer access in get_next_event (Joe Jin) [Orabug: 39726701]
- xen/ovmapi: reject oversized posted event payloads (Joe Jin) [Orabug: 39726701]
- rds: Prevent kernel-infoleak in rds_notify_queue_get() (Peilin Ye) [Orabug: 39772651]
- rds: do not leak kernel memory to user land (Eric Dumazet) [Orabug: 39772651]