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TI-2026-33932 Aliases CVE-2026-46209GHSA-f8g6-g8cv-582v

drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs()

Priority LOW 35CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 38 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/gem: Fix inconsistent plane dimension calculation in drm_gem_fb_init_with_funcs() drm_gem_fb_init_with_funcs() computes sub-sampled plane dimensions using plain integer division: unsigned int width = mode_cmd->width / (i ? info->hsub : 1); unsigned int height = mode_cmd->height / (i ? info->vsub : 1); However, the ioctl-level framebuffer_check() in drm_framebuffer.c uses drm_format_info_plane_width/height() which round up dimensions via DIV_ROUND_UP(). This inconsistency corrupts the subsequent GEM object size check for certain pixel format and dimension combinations. For example, with NV12 (vsub=2) and a 1-pixel-tall framebuffer the GEM size validation path sees height=0 instead of height=1. The expression (height - 1) then wraps to UINT_MAX as an unsigned int, causing min_size to overflow and wrap back to a small value. A tiny GEM object therefore passes the size guard, yet when the GPU accesses the chroma plane it will read or write memory beyond the object's bounds. Fix by replacing the open-coded divisions with drm_format_info_plane_width() and drm_format_info_plane_height(), which use DIV_ROUND_UP() and match the calculation already used in framebuffer_check().

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00142 3rd percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.258, 5.15.209, 6.1.175 +5Red Hat: 12 advisoriesRed Hat: 38 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.14 and later5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9, 7.1Patch availableCNA
  • Linux VendorLinux Affected 4.14 and later Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9, 7.1 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.14 to before 5.10.258; 5.11 to before 5.15.209; 5.16 to before 6.1.175; 6.2 to before 6.6.140; 6.7 to before 6.12.90; 6.13 to before 6.18.32; 6.19 to before 7.0.9VulnerableLinux
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*7.1 rc1VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.14 to before 5.10.258; 5.11 to before 5.15.209; 5.16 to before 6.1.175; 6.2 to before 6.6.140; 6.7 to before 6.12.90; 6.13 to before 6.18.32; 6.19 to before 7.0.9 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* Versions 7.1 rc1 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.90, 6.18.32, 7.0.9, 7.1

Red Hat 12 advisories

  • RHSA-2026:61351 Released 2026-08-31 · Red Hat rating Moderate
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.99.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.99.1.el10_0, kernel-64k-devel-6.12.0-55.99.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.99.1.el10_0, kernel-64k-6.12.0-55.99.1.el10_0, kernel-64k-core-6.12.0-55.99.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.99.1.el10_0, libperf-6.12.0-55.99.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.99.1.el10_0, kernel-rt-64k-6.12.0-55.99.1.el10_0, kernel-rt-64k-core-6.12.0-55.99.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.99.1.el10_0, kernel-rt-core-6.12.0-55.99.1.el10_0, kernel-rt-debug-6.12.0-55.99.1.el10_0 +11
  • RHSA-2026:47632 Released 2026-07-30 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-core-5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-debug-5.14.0-284.183.1.rt14.468.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-core-5.14.0-284.183.1.rt14.468.el9_2, kernel-rt-debug-5.14.0-284.183.1.rt14.468.el9_2 +11
  • RHSA-2026:47633 Released 2026-07-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.199.1.el8_4, kernel-4.18.0-305.199.1.el8_4, kernel-abi-stablelists-4.18.0-305.199.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.199.1.el8_4, kernel-4.18.0-305.199.1.el8_4, kernel-abi-stablelists-4.18.0-305.199.1.el8_4 +14
Show 9 more Red Hat advisories
  • RHSA-2026:47739 Released 2026-07-29 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.183.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.183.1.el9_2, kernel-64k-devel-5.14.0-284.183.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.183.1.el9_2, kernel-5.14.0-284.183.1.el9_2, kernel-64k-5.14.0-284.183.1.el9_2 +29
  • RHSA-2026:44385 Released 2026-07-23 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.129.1.el9_6, libperf-5.14.0-570.129.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.129.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.129.1.el9_6, kernel-64k-devel-5.14.0-570.129.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.129.1.el9_6, kernel-64k-5.14.0-570.129.1.el9_6, kernel-64k-core-5.14.0-570.129.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.129.1.el9_6, kernel-rt-64k-5.14.0-570.129.1.el9_6, kernel-rt-64k-core-5.14.0-570.129.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.129.1.el9_6, kernel-rt-core-5.14.0-570.129.1.el9_6, kernel-rt-debug-5.14.0-570.129.1.el9_6 +11
  • RHSA-2026:43231 Released 2026-07-22 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.139.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.139.1.el9_4, kernel-64k-devel-5.14.0-427.139.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.139.1.el9_4, kernel-5.14.0-427.139.1.el9_4, kernel-64k-5.14.0-427.139.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.139.1.el9_4, kernel-rt-core-5.14.0-427.139.1.el9_4, kernel-rt-debug-5.14.0-427.139.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.139.1.el9_4, kernel-rt-core-5.14.0-427.139.1.el9_4, kernel-rt-debug-5.14.0-427.139.1.el9_4 +11
  • RHSA-2026:40760 Released 2026-07-16 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.152.1.el8_8, kernel-4.18.0-477.152.1.el8_8, kernel-abi-stablelists-4.18.0-477.152.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.152.1.el8_8, kernel-4.18.0-477.152.1.el8_8, kernel-abi-stablelists-4.18.0-477.152.1.el8_8 +14
  • RHSA-2026:40068 Released 2026-07-15 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.201.1.el8_6, kernel-4.18.0-372.201.1.el8_6, kernel-abi-stablelists-4.18.0-372.201.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.201.1.el8_6, kernel-4.18.0-372.201.1.el8_6, kernel-abi-stablelists-4.18.0-372.201.1.el8_6 +14
  • RHSA-2026:36349 Released 2026-07-07 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.140.1.el8_10, kernel-4.18.0-553.140.1.el8_10, kernel-abi-stablelists-4.18.0-553.140.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.140.1.el8_10
  • RHSA-2026:36348 Released 2026-07-07 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-core-4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-debug-4.18.0-553.140.1.rt7.481.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-core-4.18.0-553.140.1.rt7.481.el8_10, kernel-rt-debug-4.18.0-553.140.1.rt7.481.el8_10 +7
  • RHSA-2026:36018 Released 2026-07-06 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.22.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.22.1.el9_8, kernel-64k-devel-5.14.0-687.22.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.22.1.el9_8, kernel-64k-5.14.0-687.22.1.el9_8, kernel-64k-core-5.14.0-687.22.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.22.1.el9_8, libperf-5.14.0-687.22.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.22.1.el9_8, kernel-rt-64k-5.14.0-687.22.1.el9_8, kernel-rt-64k-core-5.14.0-687.22.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.22.1.el9_8, kernel-rt-core-5.14.0-687.22.1.el9_8, kernel-rt-debug-5.14.0-687.22.1.el9_8 +9
  • RHSA-2026:34911 Released 2026-07-02 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.30.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.30.1.el10_2, kernel-64k-devel-6.12.0-211.30.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.30.1.el10_2, kernel-64k-6.12.0-211.30.1.el10_2, kernel-64k-core-6.12.0-211.30.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.30.1.el10_2, libperf-6.12.0-211.30.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.30.1.el10_2, kernel-rt-64k-6.12.0-211.30.1.el10_2, kernel-rt-64k-core-6.12.0-211.30.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.30.1.el10_2, kernel-rt-core-6.12.0-211.30.1.el10_2, kernel-rt-debug-6.12.0-211.30.1.el10_2 +9

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:44385
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:34911
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:36018
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:47739
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:43231
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:61351
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:44385
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:34911
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:36349
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:36018
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:47633
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:40068
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:40760
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:47739
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:43231
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:61351
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:44385
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:47633
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:40068
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:40760
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:36349
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:34911
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:36018
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:61351
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:36348
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:36348
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:34911
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:36018
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:47632
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:43231
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:61351
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:44385
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:34911
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:36018
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:47632
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:43231
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:61351
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:44385
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-46209
  2. 2026-10-03 Alias added: GHSA-f8g6-g8cv-582v
  3. 2026-10-16 CISA SSVC decision points changed
  4. 2026-10-19 Weakness changed · CISA ADP

References

Patch 8

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences