In the Linux kernel, the following vulnerability has been resolved: arm64: io: Extract user memory type in ioremap_prot() The only caller of ioremap_prot() outside of the generic ioremap() implementation is generic_access_phys(), which passes a 'pgprot_t' value determined from the user mapping of the target 'pfn' being accessed by the kernel. On arm64, the 'pgprot_t' contains all of the non-address bits from the pte, including the permission controls, and so we end up returning a new user mapping from ioremap_prot() which faults when accessed from the kernel on systems with PAN: | Unable to handle kernel read from unreadable memory at virtual address ffff80008ea89000 | ... | Call trace: | __memcpy_fromio+0x80/0xf8 | generic_access_phys+0x20c/0x2b8 | __access_remote_vm+0x46c/0x5b8 | access_remote_vm+0x18/0x30 | environ_read+0x238/0x3e8 | vfs_read+0xe4/0x2b0 | ksys_read+0xcc/0x178 | __arm64_sys_read+0x4c/0x68 Extract only the memory type from the user 'pgprot_t' in ioremap_prot() and assert that we're being passed a user mapping, to protect us against any changes in future that may require additional handling. To avoid falsely flagging users of ioremap(), provide our own ioremap() macro which simply wraps __ioremap_prot().

According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    crypto: algif_aead - Revert to operating out-of-place(CVE-2026-31431)

    bpf: Fix undefined behavior in interpreter sdiv/smod for INT_MIN(CVE-2026-31525)

    can: bcm: fix locking for bcm_op runtime updates(CVE-2026-23362)

    media: mediatek: vcodec: Use spinlock for context list protection lock(CVE-2025-71140)

    smb: client: Don#39;t log plaintext credentials in cifs_set_cifscreds(CVE-2026-23303)

    media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex(CVE-2026-31473)

    regmap: maple: free entry on mas_store_gfp() failure(CVE-2026-23260)

    ACPI: EC: clean up handlers on probe failure in acpi_ec_setup()(CVE-2026-31426)

    apparmor: replace recursive profile removal with iterative approach(CVE-2026-23404)

    tls: Fix race condition in tls_sw_cancel_work_tx()(CVE-2026-23240)

    macvlan: observe an RCU grace period in macvlan_common_newlink() error path(CVE-2026-23273)

    i40e: Fix preempt count leak in napi poll tracepoint(CVE-2026-23313)

    PM: runtime: Fix a race condition related to device removal(CVE-2026-23452)

    net: bridge: fix nd_tbl NULL dereference when IPv6 is disabled(CVE-2026-23381)

    p data-testid='vuln-description'Rejected reason: This CVE ID has been rejected or withdrawn by its     CVE Numbering Authority./pbr/(CVE-2026-23473)

    net: phy: register phy led_triggers during probe to avoid AB-BA deadlock(CVE-2026-23368)

    net: add proper RCU protection to /proc/net/ptype(CVE-2026-23255)

    ice: Fix memory leak in ice_set_ringparam()(CVE-2026-23389)

    ipv6: add NULL checks for idev in SRv6 paths(CVE-2026-23442)

    tracing: Fix potential deadlock in cpu hotplug with osnoise(CVE-2026-31480)

    ice: change XDP RxQ frag_size from DMA write length to xdp.frame_sz(CVE-2026-23377)

    tls: Purge async_hold in tls_decrypt_async_wait()(CVE-2026-23414)

    icmp: fix NULL pointer dereference in icmp_tag_validation()(CVE-2026-23398)

    apparmor: fix memory leak in verify_header(CVE-2026-23403)

    x86/efi: defer freeing of boot services memory(CVE-2026-23352)

    netfilter: nf_tables: always walk all pending catchall elements(CVE-2026-23278)

    nvme: fix admin queue leak on controller reset(CVE-2026-23360)

    media: dvb-net: fix OOB access in ULE extension header tables(CVE-2026-31405)

    netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels(CVE-2026-23274)

    net: vxlan: fix nd_tbl NULL dereference when IPv6 is disabled(CVE-2026-23293)

    media: dvb-core: fix wrong reinitialization of ringbuffer on reopen(CVE-2026-23253)

    nvme-fc: release admin tagset if init fails(CVE-2026-23261)

    tcp: secure_seq: add back ports to TS offset(CVE-2026-23247)

    KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE(CVE-2026-23401)

    netfilter: bpf: defer hook memory release until rcu readers are done(CVE-2026-23412)

    apparmor: fix missing bounds check on DEFAULT table in verify_dfa()(CVE-2026-23407)

    ipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu()(CVE-2026-23304)

    ext4: fix iloc.bh leak in ext4_xattr_inode_update_ref(CVE-2026-23145)

    net: gro: fix outer network offset(CVE-2026-23254)

    netfilter: nf_tables: release flowtable after rcu grace period on error(CVE-2026-23392)

    perf: Fix __perf_event_overflow() vs perf_remove_from_context() race(CVE-2026-23271)

    sunrpc: fix cache_request leak in cache_release(CVE-2026-31400)

    RDMA/umad: Reject negative data_len in ib_umad_write(CVE-2026-23243)

    af_unix: Give up GC if MSG_PEEK intervened.(CVE-2026-23394)

    clsact: Fix use-after-free in init/destroy rollback asymmetry(CVE-2026-23413)

    net: ipv6: fix panic when IPv4 route references loopback IPv6 nexthop(CVE-2026-23300)

    apparmor: fix unprivileged local user can do privileged policy management(CVE-2026-23268)

    blktrace: fix __this_cpu_read/write in preemptible context(CVE-2026-23374)

    arm64: io: Extract user memory type in ioremap_prot()(CVE-2026-23346)

    xdp: produce a warning when calculated tailroom is negative(CVE-2026-23343)

    mm: thp: deny THP for files on anonymous inodes(CVE-2026-23375)

    drm/vmwgfx: Return the correct value in vmw_translate_ptr functions(CVE-2026-23317)

    netfilter: nft_set_pipapo: split gc into unlink and reclaim phase(CVE-2026-23351)

    Squashfs: check metadata block offset is within range(CVE-2026-23388)

    net: add xmit recursion limit to tunnel xmit functions(CVE-2026-23276)

    net: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs(CVE-2026-23340)

    scsi: target: Fix recursive locking in __configfs_open_file()(CVE-2026-23292)

    netfilter: nf_tables: unconditionally bump set-gt;nelems before insertion(CVE-2026-23272)

    apparmor: fix differential encoding verification(CVE-2026-23409)

    dmaengine: idxd: Fix leaking event log memory(CVE-2026-31440)

    bpf/bonding: reject vlan+srcmac xmit_hash_policy change when XDP is loaded(CVE-2026-23310)

    apparmor: fix: limit the number of levels of policy namespaces(CVE-2026-23405)

    net: annotate data-races around sk-gt;sk_{data_ready,write_space}(CVE-2026-23302)

    nfnetlink_osf: validate individual option lengths in fingerprints(CVE-2026-23397)

    erofs: add GFP_NOIO in the bio completion if needed(CVE-2026-31467)

    nvme: fix memory allocation in nvme_pr_read_keys()(CVE-2026-23244)

    arm64: Set __nocfi on swsusp_arch_resume()(CVE-2026-23128)

    nf_tables: nft_dynset: fix possible stateful expression memleak in error path(CVE-2026-23399)

    apparmor: fix side-effect bug in match_char() macro usage(CVE-2026-23406)

    NFSD: Defer sub-object cleanup in export put callbacks(CVE-2026-31404)

    audit: add fchmodat2() to change attributes class(CVE-2025-71239)

    netfilter: xt_CT: drop pending enqueued packets on template removal(CVE-2026-23391)

    bpf: Fix a UAF issue in bpf_trampoline_link_cgroup_shim(CVE-2026-23319)

    apparmor: validate DFA start states are in bounds in unpack_pdb(CVE-2026-23269)

    bpf: Fix stack-out-of-bounds write in devmap(CVE-2026-23359)

    spi: fix use-after-free on controller registration failure(CVE-2026-31389)

    apparmor: Fix double free of ns_name in aa_replace_profiles()(CVE-2026-23408)

    spi: fix statistics allocation(CVE-2026-23475)

    smb: client: fix krb5 mount with username option(CVE-2026-31392)

    NFSD: Hold net reference for the lifetime of /proc/fs/nfs/exports fd(CVE-2026-31403)

    apparmor: fix race between freeing data and fs accessing it(CVE-2026-23411)

    apparmor: fix race on rawdata dereference(CVE-2026-23410)

    sched/deadline: Fix missing ENQUEUE_REPLENISH during PI de-boosting(CVE-2026-23371)

    dmaengine: idxd: Fix memory leak when a wq is reset(CVE-2026-31441)

Tenable has extracted the preceding description block directly from the EulerOS kernel security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6355 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6355-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     June 21, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : linux     CVE ID         : CVE-2025-22069 CVE-2025-68251 CVE-2025-68768 CVE-2025-71289                      CVE-2026-23247 CVE-2026-23272 CVE-2026-23346 CVE-2026-23394                      CVE-2026-23469 CVE-2026-31420 CVE-2026-31486 CVE-2026-31560                      CVE-2026-31613 CVE-2026-31663 CVE-2026-31717 CVE-2026-43116                      CVE-2026-43219 CVE-2026-43245 CVE-2026-43303 CVE-2026-43331                      CVE-2026-45838 CVE-2026-45839 CVE-2026-45840 CVE-2026-45841                      CVE-2026-45842 CVE-2026-45843 CVE-2026-45844 CVE-2026-45845                      CVE-2026-45846 CVE-2026-45850 CVE-2026-45930 CVE-2026-46117                      CVE-2026-46137 CVE-2026-46158 CVE-2026-46160 CVE-2026-46170                      CVE-2026-46203 CVE-2026-46216 CVE-2026-46244 CVE-2026-46274                      CVE-2026-46275 CVE-2026-46315 CVE-2026-46316 CVE-2026-46319                      CVE-2026-46320 CVE-2026-46321 CVE-2026-46322 CVE-2026-46323                      CVE-2026-46331 CVE-2026-52908 CVE-2026-52909 CVE-2026-52910                      CVE-2026-52911

    Several vulnerabilities have been discovered in the Linux kernel that     may lead to a privilege escalation, denial of service or information     leaks.

    For the stable distribution (trixie), these problems have been fixed in     version 6.12.94-1.

    We recommend that you upgrade your linux packages.

    For the detailed security status of linux please refer to its security     tracker page at:
    https://security-tracker.debian.org/tracker/linux

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - arm64: io: Extract user memory type in ioremap_prot() The only caller of ioremap_prot() outside of the     generic ioremap() implementation is generic_access_phys(), which passes a 'pgprot_t' value determined from     the user mapping of the target 'pfn' being accessed by the kernel. On arm64, the 'pgprot_t' contains all     of the non-address bits from the pte, including the permission controls, and so we end up returning a new     user mapping from ioremap_prot() which faults when accessed from the kernel on systems with PAN: | Unable     to handle kernel read from unreadable memory at virtual address ffff80008ea89000 | ... | Call trace: |
    __memcpy_fromio+0x80/0xf8 | generic_access_phys+0x20c/0x2b8 | __access_remote_vm+0x46c/0x5b8 |     access_remote_vm+0x18/0x30 | environ_read+0x238/0x3e8 | vfs_read+0xe4/0x2b0 | ksys_read+0xcc/0x178 |
    __arm64_sys_read+0x4c/0x68 Extract only the memory type from the user 'pgprot_t' in ioremap_prot() and     assert that we're being passed a user mapping, to protect us against any changes in future that may     require additional handling. To avoid falsely flagging users of ioremap(), provide our own ioremap() macro     which simply wraps __ioremap_prot(). (CVE-2026-23346)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
324048	SUSE SLED15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:2238-1)	Nessus	SuSE Local Security Checks	high
323212	EulerOS 2.0 SP15 : kernel (EulerOS-SA-2026-2485)	Nessus	Huawei Local Security Checks	high
323152	EulerOS 2.0 SP15 : kernel (EulerOS-SA-2026-2444)	Nessus	Huawei Local Security Checks	high
321868	Debian dsa-6355 : ata-modules-6.12.90+deb13-armmp-di - security update	Nessus	Debian Local Security Checks	high
319659	SUSE SLES16 Security Update : kernel (SUSE-SU-2026:21845-1)	Nessus	SuSE Local Security Checks	high
318240	SUSE SLES16 Security Update : kernel (SUSE-SU-2026:21860-1)	Nessus	SuSE Local Security Checks	high
318102	openSUSE 16 Security Update : kernel (openSUSE-SU-2026:20826-1)	Nessus	SuSE Local Security Checks	high
311340	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1596)	Nessus	Amazon Linux Local Security Checks	high
303711	Linux Distros Unpatched Vulnerability : CVE-2026-23346	Nessus	Misc.	medium

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