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Red Hat Security Advisory

RHSA-2026:57251

kernel security, bug fix, and enhancement update

Released 2026-08-20 · Red Hat rating Important · View on Red Hat →

Fixed in

Fixes 25 records

Priority HIGH 73

In the Linux kernel, the following vulnerability has been resolved: vhost: reset the vring metadata cache on vring reconfiguration vq->meta_iotlb[] caches the vhost_iotlb_map that backs each vring metadata region, and io…

CVSS 3.1HIGH 8.8 Local Low privileges No interaction EPSS 0.00409 Published 2026-08-21 Partial fix · 5.10.265, 5.15.216 +6
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd() Two latent bugs in the Text-phase handler, both present since the orig…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00778 Published 2026-07-19 Partial fix · 5.10.259, 5.15.210 +6 CWE-415
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Validate CHAP_R length before base64 decode chap_server_compute_hash() allocates client_digest as kzalloc(chap->digest_size) and th…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00711 Published 2026-07-19 Partial fix · 6.1.176, 6.6.143 +4 CWE-122
Priority MEDIUM 50

In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - Fix handling of MAY_BACKLOG requests MAY_BACKLOG requests can return EBUSY.

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00681 Published 2026-05-19 Partial fix · 5.10.258, 5.15.209 +6 CWE-390
Priority MEDIUM 49

In the Linux kernel, the following vulnerability has been resolved: smb/client: handle overlapping allocated ranges in fallocate smb3_simple_fallocate_range() can skip holes when an allocated range returned by the server…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00514 Published 2026-08-10 Partial fix · 5.10.265, 5.13 +8 CWE-125
Priority MEDIUM 49

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query_info() replay double-free A response-bearing attempt can return a replayable error and free its response buffer.

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.00457 Published 2026-07-25 Fixed in 6.6.145, 6.12.96 +3 CWE-415
Priority MEDIUM 46

In the Linux kernel, the following vulnerability has been resolved: smb/client: fix out-of-bounds read in symlink_data() Since smb2_check_message() returns success without length validation for the symlink error response…

CVSS 3.1CRITICAL 9.1 Network No auth No interaction EPSS 0.00525 Published 2026-05-28 Fixed in 6.1, 6.1.175 +5 CWE-125
Priority MEDIUM 40

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix double-free in SMB2_open() replay A response-bearing attempt can return a replayable error and free its response buffer.

CVSS 3.1HIGH 8.8 Network No auth User interaction EPSS 0.00354 Published 2026-07-25 Fixed in 6.6.145, 6.12.96 +3 CWE-415
Priority LOW 39

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: zero-initialize GART table on allocation GART TLB is flushed after unmapping but not after mapping.

CVSS 3.1HIGH 8.8 Local Low privileges No interaction EPSS 0.00127 Published 2026-07-19 Partial fix · 6.1.175, 6.6.140 +4 CWE-457
Priority LOW 37

In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: Prevent UAF caused by non-leader exec() race Wongi and Jungwoo decoded and reported a non-leader exec() related race which can result…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00503 Published 2026-07-29 Partial fix · 5.10.262, 5.15.213 +6 CWE-362
Priority LOW 37

In the Linux kernel, the following vulnerability has been resolved: memfd: deny writeable mappings when implying SEAL_WRITE When SEAL_EXEC is added, SEAL_WRITE is implied to make W^X.

CVSS 3.1HIGH 8.4 Local Low privileges No interaction EPSS 0.00127 Published 2026-07-19 Fixed in 6.6.143, 6.12.93 +3 CWE-362
TI-2026-45582 CVE-2026-64017 · GHSA-pqjq-mhgh-j532

blk-mq: pop cached request if it is usable

Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: blk-mq: pop cached request if it is usable When submitting a bio to blk-mq, if the task should sleep after peeking a cached request, but before it pops…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00126 Published 2026-07-19 Partial fix · 6.1.191, 6.6.161 +5 CWE-416
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: drm/i915: Fix potential UAF in TTM object purge TLDR: The bo->ttm object might be changed by calling ttm_bo_validate(), move casting it to an i915_tt ob…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00176 Published 2026-07-19 Partial fix · 6.1.176, 6.6.143 +4 CWE-416
TI-2026-45444 CVE-2026-63879 · GHSA-497j-x834-cghh

drm/amdgpu: fix amdgpu_hmm_range_get_pages

Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix amdgpu_hmm_range_get_pages The notifier sequence must only be read once or otherwise we could work with invalid pages.

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00142 Published 2026-07-19 Partial fix · 6.6.160, 6.12.114 +3 CWE-362
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: drm/i915/gem: Fix phys BO pread/pwrite with offset sg_page() returns struct page pointer not (void *) so the scaling of pread/pwrite is wrong for phys B…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00134 Published 2026-07-01 Partial fix · 5.10.259, 5.15.210 +6 CWE-1164
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: sched/psi: fix race between file release and pressure write A potential race condition exists between pressure write and cgroup file release regarding t…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00147 Published 2026-06-24 Partial fix · 6.1.191, 6.6.160 +4 CWE-367
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: udf: fix partition descriptor append bookkeeping Mounting a crafted UDF image with repeated partition descriptors can trigger a heap out-of-bounds write…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00177 Published 2026-05-27 Partial fix · 4.19, 5.10.259 +7 CWE-787
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix watch_id bounds checking in debug address watch v2 The address watch clear code receives watch_id as an unsigned value (u32), but some h…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00207 Published 2026-05-27 Fixed in 6.6.128, 6.12.75 +3 CWE-125
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Refactor amdgpu_gem_va_ioctl for Handling Last Fence Update and Timeline Management v4 This commit simplifies the amdgpu_gem_va_ioctl functi…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00124 Published 2026-05-06 Partial fix · 6.18.16, 6.19.6 +1 CWE-416
Priority LOW 35

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() The kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8 bytes via memset without…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00139 Published 2026-05-06 Partial fix · 5.10.252, 5.15.202 +6 CWE-787
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix buffer overflow in SDMA queue checkpoint/restore on GFX11 The v11 MQD manager incorrectly assigned the CP-compute variants of checkpoint…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00153 Published 2026-06-25 Partial fix · 6.6.143, 6.12.94 +3 CWE-787
Priority LOW 33

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size [Why & How] The VBIOS integrated info tables (v1_11 and v2_1) contain HdmiRegNum…

CVSS 3.1HIGH 7.8 Local Low privileges No interaction EPSS 0.00129 Published 2026-06-25 Partial fix · 5.15.210, 6.1.176 +5 CWE-787
Priority LOW 32

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async [Why&How] dc_process_dmub_aux_transfer_async() copies payl…

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.00166 Published 2026-07-24 Partial fix · 5.15.209, 6.1.175 +5 CWE-121
Priority LOW 32

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Use krealloc_array() in dal_vector_reserve() [Why & How] dal_vector_reserve() computes the allocation size as "capacity * vector->struc…

CVSS 3.1HIGH 7.0 Local Low privileges No interaction EPSS 0.00147 Published 2026-07-01 Partial fix · 5.10.260, 5.15.210 +6 CWE-190
Priority LOW 31

In the Linux kernel, the following vulnerability has been resolved: smb: client: mask server-provided mode to 07777 in modefromsid When modefromsid is active, parse_dacl() applies the server-provided sub_auth[2] value fr…

CVSS 3.1HIGH 7.1 Network No auth User interaction EPSS 0.00309 Published 2026-07-25 Partial fix · 5.10.261, 5.15.212 +6 CWE-20