In the Linux kernel, the following vulnerability has been resolved: rxrpc: fix RESPONSE authenticator parser OOB read rxgk_verify_authenticator() copies auth_len bytes into a temporary buffer and then passes p + auth_len as the parser limit to rxgk_do_verify_authenticator(). Since p is a __be32 *, that inflates the parser end pointer by a factor of four and lets malformed RESPONSE authenticators read past the kmalloc() buffer. Decoded from the original latest-net reproduction logs with scripts/decode_stacktrace.sh: BUG: KASAN: slab-out-of-bounds in rxgk_verify_response() Call Trace: dump_stack_lvl() [lib/dump_stack.c:123] print_report() [mm/kasan/report.c:379 mm/kasan/report.c:482] kasan_report() [mm/kasan/report.c:597] rxgk_verify_response() [net/rxrpc/rxgk.c:1103 net/rxrpc/rxgk.c:1167 net/rxrpc/rxgk.c:1274] rxrpc_process_connection() [net/rxrpc/conn_event.c:266 net/rxrpc/conn_event.c:364 net/rxrpc/conn_event.c:386] process_one_work() [kernel/workqueue.c:3281] worker_thread() [kernel/workqueue.c:3353 kernel/workqueue.c:3440] kthread() [kernel/kthread.c:436] ret_from_fork() [arch/x86/kernel/process.c:164] Allocated by task 54: rxgk_verify_response() [include/linux/slab.h:954 net/rxrpc/rxgk.c:1155 net/rxrpc/rxgk.c:1274] rxrpc_process_connection() [net/rxrpc/conn_event.c:266 net/rxrpc/conn_event.c:364 net/rxrpc/conn_event.c:386] Convert the byte count to __be32 units before constructing the parser limit.

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:30129 advisory.

    * kernel: rxrpc: fix RESPONSE authenticator parser OOB read (CVE-2026-31636)
      * kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038)
      * kernel: tcp: fix potential race in tcp_v6_syn_recv_sock() (CVE-2026-43198)
      * kernel: scsi: qla2xxx: Completely fix fcport double free (CVE-2026-43414)
      * kernel: RDMA/iwcm: Fix workqueue list corruption by removing work_list (CVE-2026-45898)
      * kernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CVE-2026-46117)
      * kernel: RDMA/mana: Validate rx_hash_key_len (CVE-2026-46145)
      * kernel: nvmet-tcp: fix race between ICReq handling and queue teardown (CVE-2026-46135)
      * kernel: KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry     (CVE-2026-46316)


    Bug Fix(es) and Enhancement(s):

      * Unexpected execmem SELinux denials after CVE-2026-46054 fix [rhel-10.2.z] (JIRA:RHEL-185117)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:30129 advisory.

    * kernel: rxrpc: fix RESPONSE authenticator parser OOB read (CVE-2026-31636)

    * kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038)

    * kernel: tcp: fix potential race in tcp_v6_syn_recv_sock() (CVE-2026-43198)

    * kernel: scsi: qla2xxx: Completely fix fcport double free (CVE-2026-43414)

    * kernel: RDMA/iwcm: Fix workqueue list corruption by removing work_list (CVE-2026-45898)

    * kernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CVE-2026-46117)

    * kernel: RDMA/mana: Validate rx_hash_key_len (CVE-2026-46145)

    * kernel: nvmet-tcp: fix race between ICReq handling and queue teardown (CVE-2026-46135)

    Bug Fix(es) and Enhancement(s):

    * Unexpected execmem SELinux denials after CVE-2026-46054 fix [rhel-10.2.z] (JIRA:Rocky Linux-185117)

Tenable has extracted the preceding description block directly from the RockyLinux 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 Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:30129 advisory.

    The kernel packages contain the Linux kernel, the core of any Linux operating system.

    Security Fix(es):

    * kernel: rxrpc: fix RESPONSE authenticator parser OOB read (CVE-2026-31636)

    * kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038)

    * kernel: tcp: fix potential race in tcp_v6_syn_recv_sock() (CVE-2026-43198)

    * kernel: scsi: qla2xxx: Completely fix fcport double free (CVE-2026-43414)

    * kernel: RDMA/iwcm: Fix workqueue list corruption by removing work_list (CVE-2026-45898)

    * kernel: RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() (CVE-2026-46117)

    * kernel: RDMA/mana: Validate rx_hash_key_len (CVE-2026-46145)

    * kernel: nvmet-tcp: fix race between ICReq handling and queue teardown (CVE-2026-46135)

    Bug Fix(es) and Enhancement(s):

    * Unexpected execmem SELinux denials after CVE-2026-46054 fix [rhel-10.2.z] (JIRA:RHEL-185117)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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.

  - rxrpc: fix RESPONSE authenticator parser OOB read rxgk_verify_authenticator() copies auth_len bytes into a     temporary buffer and then passes p + auth_len as the parser limit to rxgk_do_verify_authenticator(). Since     p is a __be32 *, that inflates the parser end pointer by a factor of four and lets malformed RESPONSE     authenticators read past the kmalloc() buffer. Decoded from the original latest-net reproduction logs with     scripts/decode_stacktrace.sh: BUG: KASAN: slab-out-of-bounds in rxgk_verify_response() Call Trace:
    dump_stack_lvl() [lib/dump_stack.c:123] print_report() [mm/kasan/report.c:379 mm/kasan/report.c:482]     kasan_report() [mm/kasan/report.c:597] rxgk_verify_response() [net/rxrpc/rxgk.c:1103 net/rxrpc/rxgk.c:1167     net/rxrpc/rxgk.c:1274] rxrpc_process_connection() [net/rxrpc/conn_event.c:266 net/rxrpc/conn_event.c:364     net/rxrpc/conn_event.c:386] process_one_work() [kernel/workqueue.c:3281] worker_thread()     [kernel/workqueue.c:3353 kernel/workqueue.c:3440] kthread() [kernel/kthread.c:436] ret_from_fork()     [arch/x86/kernel/process.c:164] Allocated by task 54: rxgk_verify_response() [include/linux/slab.h:954     net/rxrpc/rxgk.c:1155 net/rxrpc/rxgk.c:1274] rxrpc_process_connection() [net/rxrpc/conn_event.c:266     net/rxrpc/conn_event.c:364 net/rxrpc/conn_event.c:386] Convert the byte count to __be32 units before     constructing the parser limit. (CVE-2026-31636)

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

ID	Name	Product	Family	Severity
323260	AlmaLinux 10 : kernel (ALSA-2026:30129)	Nessus	Alma Linux Local Security Checks	critical
323232	RockyLinux 10 : kernel (RLSA-2026:30129)	Nessus	Rocky Linux Local Security Checks	critical
322976	RHEL 10 : kernel (RHSA-2026:30129)	Nessus	Red Hat Local Security Checks	critical
310428	Linux Distros Unpatched Vulnerability : CVE-2026-31636	Nessus	Misc.	critical

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CVE-2026-31636

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