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BELL-CVE-2026-89481

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

fkie_cve-2026-89481

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

nvme-tcp: fix host memory disclosure on R2T for a read command

nvme_tcp_handle_r2t() does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it: nvme_tcp_setup_h2c_data_pdu() builds the H2CData header and nvme_tcp_try_send_data() sends the request's data buffer. That buffer is the READ destination, so its contents go to the controller.

The command then completes normally and nothing is logged.

Against a test controller that answers every READ with an R2T, a 4096 byte buffered read returned all 4096 bytes, split over two R2Ts. The pages contained stale kernel data, including an array of struct page pointers.

Reject an R2T for a request that is not a write.

GHSA-fmg2-x8fr-fw62

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

nvme-tcp: fix host memory disclosure on R2T for a read command

The command then completes normally and nothing is logged.

Reject an R2T for a request that is not a write.

msrc_CVE-2026-89481 — nvme-tcp: fix host memory disclosure on R2T for a read command

msrc_CVE-2026-89481

openSUSE-SU-2026:11880-1 — kernel-devel-7.2.7-1.1 on GA media

kernel-devel-7.2.7-1.1 on GA media

RHSA-2026:71602 — Red Hat Security Advisory: kernel security, bug fix, and enhancement update

kernel: fbcon: Set fb_display[i]->mode to NULL when the mode is released kernel: libceph: fix potential use-after-free in have_mon_and_osd_map() kernel: libceph: make decode_pool() more resilient against corrupted osdmaps kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() kernel: Linux kernel: Denial of Service in libceph OSD client due to unreset sparse-read state kernel: drm/amdgpu/vcn4: Prevent OOB reads when parsing dec msg kernel: drm/amdgpu/vcn4: Prevent OOB reads when parsing IB kernel: drm/amdgpu/vcn3: Prevent OOB reads when parsing dec msg kernel: drm/amdgpu/userq: fix access to stale wptr mapping kernel: af_unix: Drop all SCM attributes for SOCKMAP kernel: accel/ivpu: Add buffer overflow check in MS get_info_ioctl kernel: drm/xe/eustall: Fix drm_dev_put called before stream disable in close kernel: drm/virtio: use uninterruptible resv lock for plane updates kernel: drm/amdgpu/vce: fix integer overflow in image size kernel: pppoe: reload header pointer after dev_hard_header() kernel: drm/amdkfd: fix 32-bit overflow in CWSR total size calculation kernel: drm/xe: Hold a dma-buf reference for imported BOs kernel: drm/xe/rtp: Add RING_FORCE_TO_NONPRIV_DENY to OA whitelists kernel: drm/amdgpu: Fix context pstate override handling kernel: ipvs: do not propagate one-packet flag to synced conns kernel: nvme-tcp: fix host memory disclosure on R2T for a read command

RLSA-2026:71602 — Important: kernel security, bug fix, and enhancement update

Affected: Rocky Linux:10: kernel

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

Security Fix(es):

* kernel: fbcon: Set fb_display[i]->mode to NULL when the mode is released (CVE-2025-40323)

* kernel: libceph: fix potential use-after-free in have_mon_and_osd_map() (CVE-2025-68285)

* kernel: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116)

* kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984)

* kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990)

* kernel: Linux kernel: Denial of Service in libceph OSD client due to unreset sparse-read state (CVE-2026-23136)

* kernel: drm/amdgpu/vcn3: Prevent OOB reads when parsing dec msg (CVE-2026-46230)

* kernel: drm/amdgpu/vcn4: Prevent OOB reads when parsing IB (CVE-2026-46204)

* kernel: drm/amdgpu/vcn4: Prevent OOB reads when parsing dec msg (CVE-2026-46199)

* kernel: drm/amdgpu/userq: fix access to stale wptr mapping (CVE-2026-46311)

* kernel: af_unix: Drop all SCM attributes for SOCKMAP (CVE-2026-53005)

* kernel: accel/ivpu: Add buffer overflow check in MS get_info_ioctl (CVE-2026-53203)

* kernel: drm/xe/eustall: Fix drm_dev_put called before stream disable in close (CVE-2026-53290)

* kernel: drm/virtio: use uninterruptible resv lock for plane updates (CVE-2026-64098)

* kernel: Linux kernel: PPPoE memory corruption via stale pointer (CVE-2026-68121)

* kernel: drm/amdgpu/vce: fix integer overflow in…

UBUNTU-CVE-2026-89481

Affected: Ubuntu:16.04:LTS: linux-hwe-edge, Ubuntu:18.04:LTS: linux-aws-5.0, Ubuntu:18.04:LTS: linux-aws-5.3, Ubuntu:Pro:18.04:LTS: linux-aws-5.4, Ubuntu:18.04:LTS: linux-azure, Ubuntu:18.04:LTS: linux-azure-5.3, Ubuntu:Pro:18.04:LTS: linux-azure-5.4, Ubuntu:18.04:LTS: linux-azure-edge, Ubuntu:18.04:LTS: linux-gcp, Ubuntu:18.04:LTS: linux-gcp-5.3 and 219 more

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix host memory disclosure on R2T for a read command nvme_tcp_handle_r2t() does not check the direction of the request the R2T refers to. A malicious controller can send an R2T for a READ and the host will answer it: nvme_tcp_setup_h2c_data_pdu() builds the H2CData header and nvme_tcp_try_send_data() sends the request's data buffer. That buffer is the READ destination, so its contents go to the controller. The command then completes normally and nothing is logged. Against a test controller that answers every READ with an R2T, a 4096 byte buffered read returned all 4096 bytes, split over two R2Ts. The pages contained stale kernel data, including an array of struct page pointers. Reject an R2T for a request that is not a write.