Threats Tagged 'cve-2026-63888'

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: net: atm: fix crash due to unvalidated vcc pointer in sigd_send() (CVE-2026-31411) * kernel: fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath (CVE-2026-43112) * kernel: net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels (CVE-2026-46099) * kernel: dm log: fix out-of-bounds write due to region_count overflow (CVE-2026-53059) Bug Fix(es) and Enhancement(s): * [RHEL 9] Bonding reports unknown speed/duplex for tg3 interface (JIRA:RHEL-182765) * vhost: reset the vring metadata cache on vring reconfiguration (JIRA:RHEL-224546) 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.

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() (CVE-2026-43206) * kernel: drm/amdgpu: Refactor amdgpu_gem_va_ioctl for Handling Last Fence Update and Timeline Management v4 (CVE-2026-43237) * kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493) * kernel: udf: fix partition descriptor append bookkeeping (CVE-2026-45991) * kernel: drm/amdkfd: Fix watch_id bounds checking in debug address watch v2 (CVE-2026-45878) * kernel: smb/client: fix out-of-bounds read in symlink_data() (CVE-2026-46185) * kernel: sched/psi: fix race between file release and pressure write (CVE-2026-52991) * kernel: drm/amdkfd: Fix buffer overflow in SDMA queue checkpoint/restore on GFX11 (CVE-2026-53143) * kernel: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size (CVE-2026-53136) * kernel: drm/amd/display: Use krealloc_array() in dal_vector_reserve() (CVE-2026-53329) * kernel: drm/i915/gem: Fix phys BO pread/pwrite with offset (CVE-2026-53356) * kernel: drm/amdgpu: zero-initialize GART table on allocation (CVE-2026-53374) * kernel: drm/i915: Fix potential UAF in TTM object purge (CVE-2026-63884) * kernel: scsi: target: iscsi: Validate CHAP_R length before base64 decode (CVE-2026-63886) * kernel: memfd: deny writeable mappings when implying SEAL_WRITE (CVE-2026-63952) * kernel: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd() (CVE-2026-63888) * kernel: blk-mq: pop cached request if it is usable (CVE-2026-64017) * kernel: drm/amdgpu: fix amdgpu_hmm_range_get_pages (CVE-2026-63879) * kernel: drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async (CVE-2026-64219) * kernel: smb: client: fix double-free in SMB2_open() replay (CVE-2026-64382) * kernel: smb: client: mask server-provided mode to 07777 in modefromsid (CVE-2026-64379) * kernel: smb: client: fix query_info() replay double-free (CVE-2026-64386) * kernel: posix-cpu-timers: Prevent UAF caused by non-leader exec() race (CVE-2026-64560) * kernel: smb/client: handle overlapping allocated ranges in fallocate (CVE-2026-68388) Bug Fix(es) and Enhancement(s): * CLONE - RHEL 10.2.z xfs: fix exchange-range reflink flag clearing issue with INO1_WRITTEN (JIRA:RHEL-223954) * vhost: reset the vring metadata cache on vring reconfiguration [rhel-10.2.z] (JIRA:RHEL-224545) * cifs: periodic IO errors when rename races with lease break [rhel-10.2.z] (JIRA:RHEL-235459) * cifs: smb1 directory listings from xp server returning EINVAL and EIO [rhel-10.2.z] (JIRA:RHEL-235812) 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.

A security advisory from Red Hat addresses multiple vulnerabilities and bugs in the Linux kernel packages for Red Hat Enterprise Linux 8. The update includes fixes for several security issues such as dangling pointers, race conditions, memory counter updates, CRC overreads, double-free errors, and improper handling of allocated ranges. The advisory also includes bug fixes and enhancements related to network interface controller stalls and resets. The update is rated as important by Red Hat and requires a system reboot to take effect.

This Red Hat security advisory addresses multiple vulnerabilities and bugs in the kernel-rt packages, which provide the Real Time Linux Kernel for systems requiring high determinism. The update fixes several security issues including dangling pointer, race conditions, memory counter updates, CRC overread, double-free errors, and improper handling of server-provided modes. The advisory also includes bug fixes and enhancements related to network interface controller stalls and resets. The update is rated as important by Red Hat and requires a system reboot to take effect.

A vulnerability in the Linux kernel's SCSI target iSCSI implementation (CVE-2026-63888) involves a CRC buffer overread and a double-free in the iscsit_handle_text_cmd() function. These bugs have existed since the original LIO integration and relate to improper handling of the DataDigest CRC buffer during the Text-phase handler. The vulnerability has a high CVSS score of 9.8, indicating critical impact on confidentiality, integrity, and availability. A patch is available and should be applied to affected Linux kernel versions to mitigate the issue.