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CVE-2026-46220— drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于drm/amdgpu/sdma4中栅栏发射使用BUG_ON，可能导致内核崩溃。

AI Predicted 7.8 Difficulty: Easy EPSS 0.12% · P2

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7< ecaa80318e900ca0c3f687742ede33b41cfd2f8e affected
2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7< 25e7d56a39657d56d1ea6d78992f7ed15dedb412 affected
2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7< d4c56932d29773e278be6a65a5384a36c95b89a4 affected
2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7< 4f7ca00fa91daf0795ec6b3b130c5ebba1f155fe affected
2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7< d331fb241a4602253976ddd65144a8ba2b05665d affected
2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7< 0b91ea46bb68abf98a082bf239092253bbd6aaa2 affected
2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7< a4fd82fb0757c180bf622907397c528b89a827b2 affected
2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7< 78d2e624fa073c14970aa097adcf3ea31c157a66 affected
… +10 more rows
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I. Basic Information for CVE-2026-46220

Vulnerability Information
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Vulnerability Title
drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/sdma4: replace BUG_ON with WARN_ON in fence emission sdma_v4_0_ring_emit_fence() contains two BUG_ON(addr & 0x3) assertions that verify fence writeback addresses are dword-aligned. These assertions can be reached from unprivileged userspace via crafted DRM_IOCTL_AMDGPU_CS submissions, causing a fatal kernel panic in a scheduler worker thread. Replace both BUG_ON() calls with WARN_ON() to log the condition without crashing the kernel. A misaligned fence address at this point indicates a driver bug, but crashing the kernel is never the correct response when the assertion is reachable from userspace. The CS IOCTL path is the correct place to filter invalid submissions; the ring emission callback is too late to do anything about it. (cherry picked from commit b90250bd933afd1ba94d86d6b13821997b22b18e)
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于drm/amdgpu/sdma4中栅栏发射使用BUG_ON，可能导致内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 2130f89ced2cc0f5113bb427c1cbc7a4ca7729c7 ~ ecaa80318e900ca0c3f687742ede33b41cfd2f8e -
Linux Linux 4.12 -

II. Public POCs for CVE-2026-46220

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III. Intelligence Information for CVE-2026-46220

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Patches & Fixes for CVE-2026-46220 (8)

Same Patch Batch · Linux · 2026-05-28 · 135 CVEs total

CVE-2026-46135 9.8 CRITICAL nvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-46137 9.8 CRITICAL mptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-46115 9.8 CRITICAL block: add pgmap check to biovec_phys_mergeable
CVE-2026-46195 9.8 CRITICAL smb: client: validate dacloffset before building DACL pointers
CVE-2026-46155 9.1 CRITICAL smb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-46119 9.1 CRITICAL libceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-46185 9.1 CRITICAL smb/client: fix out-of-bounds read in symlink_data()
CVE-2026-46125 8.8 HIGH wifi: mac80211: remove station if connection prep fails
CVE-2026-46166 8.8 HIGH wifi: mac80211: use safe list iteration in radar detect work
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
CVE-2026-46174 8.8 HIGH x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-46238 8.8 HIGH batman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-46152 8.8 HIGH wifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-46212 8.8 HIGH batman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-46113 8.8 HIGH KVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-46232 8.1 HIGH HID: playstation: Clamp num_touch_reports
CVE-2026-46138 8.1 HIGH Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-46215 7.8 HIGH drm: Set old handle to NULL before prime swap in change_handle
CVE-2026-46129 7.8 HIGH btrfs: fix double free in create_space_info() error path
CVE-2026-46227 7.8 HIGH sctp: revalidate list cursor after sctp_sendmsg_to_asoc() in SCTP_SENDALL

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46220

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