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ALSA-2026:67468 — Important: kernel security update

Affected: AlmaLinux:8: bpftool, AlmaLinux:8: kernel, AlmaLinux:8: kernel-abi-stablelists, AlmaLinux:8: kernel-core, AlmaLinux:8: kernel-cross-headers, AlmaLinux:8: kernel-debug, AlmaLinux:8: kernel-debug-core, AlmaLinux:8: kernel-debug-devel, AlmaLinux:8: kernel-debug-modules, AlmaLinux:8: kernel-debug-modules-extra and 15 more

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

Security Fix(es):

* kernel: EDAC/bluefield: Fix potential integer overflow (CVE-2024-53161) * kernel: wifi: mac80211: Discard Beacon frames to non-broadcast address (CVE-2025-71127) * kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (CVE-2026-43133) * kernel: net: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove (CVE-2026-52947) * kernel: wifi: nl80211: reject oversized EMA RNR lists (CVE-2026-53182) * kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush() (CVE-2026-63802) * kernel: scsi: scsi_transport_fc: Widen FPIN pname walker counter to u32 (CVE-2026-63889) * kernel: wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb (CVE-2026-64117) * kernel: Linux kernel: ath9k Wi-Fi driver use-after-free vulnerability leading to system crash (CVE-2026-68363) * kernel: dm-verity: fix buffer overflow in FEC calculation (CVE-2026-72098) * kernel: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer (CVE-2026-74556)

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.

BELL-CVE-2026-74556

Affected: Alpaquita:23: linux-lts, Alpaquita:25: linux-lts, Alpaquita:stream: linux-lts

certfr-2026-avi-1090 — De multiples vulnérabilités ont été découvertes dans le noyau Linux de Debian. Elles permettent à un attaquant de provo…

certfr-2026-avi-1090

EUVD-2026-356424

fkie_cve-2026-74556

In the Linux kernel, the following vulnerability has been resolved:

scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer

iscsi_tcp_hdr_dissect() receives the data segment of several PDU types into the fixed-size conn->data buffer, which is allocated for ISCSI_DEF_MAX_RECV_SEG_LEN (8192) bytes. For the LOGIN_RSP, TEXT_RSP, REJECT and ASYNC_EVENT opcodes the dissect path already rejects a PDU whose DataSegmentLength exceeds that buffer.

The SCSI Command Response (ISCSI_OP_SCSI_CMD_RSP) path also copies its data segment (sense/response data) into conn->data via iscsi_tcp_data_recv_prep(), but it does so without the same check. The only upstream bound on in.datalen is conn->max_recv_dlength, the initiator's advertised MaxRecvDataSegmentLength, which is commonly negotiated well above 8192 (open-iscsi defaults to 262144). A target that returns a SCSI Response with a DataSegmentLength between 8193 and max_recv_dlength therefore overflows the 8192-byte conn->data buffer.

Once the same bound applies, ISCSI_OP_SCSI_CMD_RSP is handled exactly like those responses: bound the data segment, receive it into conn->data when present, and otherwise complete the PDU with no data. Fold the opcode into that case group rather than duplicating the check.

GHSA-2m3x-37gx-2chv

In the Linux kernel, the following vulnerability has been resolved:

scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer

msrc_CVE-2026-74556 — scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer

msrc_CVE-2026-74556

openSUSE-SU-2026:21910-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

RHSA-2026:67469 — Red Hat Security Advisory: kernel-rt security update

kernel: EDAC/bluefield: Fix potential integer overflow kernel: wifi: mac80211: Discard Beacon frames to non-broadcast address kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation kernel: net: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove kernel: wifi: nl80211: reject oversized EMA RNR lists kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush() kernel: scsi: scsi_transport_fc: Widen FPIN pname walker counter to u32 kernel: wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb kernel: net: qrtr: restrict socket creation to the initial network namespace kernel: Linux kernel: ath9k Wi-Fi driver use-after-free vulnerability leading to system crash kernel: dm-verity: fix buffer overflow in FEC calculation kernel: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer

RLSA-2026:67468 — Important: kernel security update

Affected: Rocky Linux:8: kernel

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

Security Fix(es):

* kernel: EDAC/bluefield: Fix potential integer overflow (CVE-2024-53161)

* kernel: wifi: mac80211: Discard Beacon frames to non-broadcast address (CVE-2025-71127)

* kernel: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation (CVE-2026-43133)

* kernel: net: qrtr: fix refcount saturation and potential UAF in qrtr_port_remove (CVE-2026-52947)

* kernel: wifi: nl80211: reject oversized EMA RNR lists (CVE-2026-53182)

* kernel: blk-cgroup: fix UAF in __blkcg_rstat_flush() (CVE-2026-63802)

* kernel: scsi: scsi_transport_fc: Widen FPIN pname walker counter to u32 (CVE-2026-63889)

* kernel: wifi: mac80211: capture fast-RX rate before mesh reuses skb->cb (CVE-2026-64117)

* kernel: Linux kernel: ath9k Wi-Fi driver use-after-free vulnerability leading to system crash (CVE-2026-68363)

* kernel: dm-verity: fix buffer overflow in FEC calculation (CVE-2026-72098)

* kernel: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer (CVE-2026-74556)

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.

SUSE-SU-2026:23477-1 — Security update for the Linux Kernel

Security update for the Linux Kernel

UBUNTU-CVE-2026-74556

Affected: Ubuntu:Pro:14.04:LTS: linux, Ubuntu:Pro:14.04:LTS: linux-aws, Ubuntu:Pro:14.04:LTS: linux-azure, Ubuntu:Pro:14.04:LTS: linux-lts-xenial, Ubuntu:Pro:16.04:LTS: linux, Ubuntu:Pro:16.04:LTS: linux-aws, Ubuntu:Pro:16.04:LTS: linux-aws-hwe, Ubuntu:Pro:16.04:LTS: linux-azure, Ubuntu:Pro:16.04:LTS: linux-gcp, Ubuntu:Pro:16.04:LTS: linux-hwe and 246 more

In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer iscsi_tcp_hdr_dissect() receives the data segment of several PDU types into the fixed-size conn->data buffer, which is allocated for ISCSI_DEF_MAX_RECV_SEG_LEN (8192) bytes. For the LOGIN_RSP, TEXT_RSP, REJECT and ASYNC_EVENT opcodes the dissect path already rejects a PDU whose DataSegmentLength exceeds that buffer. The SCSI Command Response (ISCSI_OP_SCSI_CMD_RSP) path also copies its data segment (sense/response data) into conn->data via iscsi_tcp_data_recv_prep(), but it does so without the same check. The only upstream bound on in.datalen is conn->max_recv_dlength, the initiator's advertised MaxRecvDataSegmentLength, which is commonly negotiated well above 8192 (open-iscsi defaults to 262144). A target that returns a SCSI Response with a DataSegmentLength between 8193 and max_recv_dlength therefore overflows the 8192-byte conn->data buffer. Once the same bound applies, ISCSI_OP_SCSI_CMD_RSP is handled exactly like those responses: bound the data segment, receive it into conn->data when present, and otherwise complete the PDU with no data. Fold the opcode into that case group rather than duplicating the check.

WID-SEC-W-2026-2852 — Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Linux Kernel ausnutzen, um root Rechte zu erlangen, um einen Denial of Service herbeizuführen oder einen nicht näher spezifizierten Angriff durchzuführen.