Linux: Out-of-bounds Read
CVE-2023-53090 is a high-severity out-of-bounds read vulnerability in Linux, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists versions 5a3fb3b745af0ce46ec2e0c8e507bae45b937334, bbf5eada4334a96e3a204b2307ff5b14dc380b0b, 6936525142a015e854d0a23e9ad9ea0a28b3843d as the first without the flaw, so updating Linux to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.21% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Linux to 5a3fb3b745af0ce46ec2e0c8e507bae45b937334 or bbf5eada4334a96e3a204b2307ff5b14dc380b0b or 6936525142a015e854d0a23e9ad9ea0a28b3843d or 2fece63b55c5d74cd6f5de51159e2cde37e10555, whichever matches your release line, or a later version.
- Update Linux Kernel to 4.19.279 or 5.4.238 or 5.10.176 or 5.15.104, whichever matches your release line, or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Linux | Linux | 4a488a7ad71401169cecee75dc94bcce642e2c53 up to, but not including, 5a3fb3b745af0ce46ec2e0c8e507bae45b937334; 4a488a7ad71401169cecee75dc94bcce642e2c53 up to, but not including, bbf5eada4334a96e3a204b2307ff5b14dc380b0b; 4a488a7ad71401169cecee75dc94bcce642e2c53 up to, but not including, 6936525142a015e854d0a23e9ad9ea0a28b3843d; 4a488a7ad71401169cecee75dc94bcce642e2c53 up to, but not including, 2fece63b55c5d74cd6f5de51159e2cde37e10555; 4a488a7ad71401169cecee75dc94bcce642e2c53 up to, but not including, d9923e7214a870b312bf61f6a89c7554d0966985; 4a488a7ad71401169cecee75dc94bcce642e2c53 up to, but not including, 61f306f8df0d5559659c5578cf6d95236bcdcb25; 4a488a7ad71401169cecee75dc94bcce642e2c53 up to, but not including, 4fc8fff378b2f2039f2a666d9f8c570f4e58352c; 3.19 | 5a3fb3b745af0ce46ec2e0c8e507bae45b937334, bbf5eada4334a96e3a204b2307ff5b14dc380b0b, 6936525142a015e854d0a23e9ad9ea0a28b3843d, 2fece63b55c5d74cd6f5de51159e2cde37e10555, d9923e7214a870b312bf61f6a89c7554d0966985, 61f306f8df0d5559659c5578cf6d95236bcdcb25 |
| Linux | Linux Kernel | 3.19 up to, but not including, 4.19.279; 4.20 up to, but not including, 5.4.238; 5.5 up to, but not including, 5.10.176; 5.11 up to, but not including, 5.15.104; 5.16 up to, but not including, 6.1.21; 6.2 up to, but not including, 6.2.8 | 4.19.279, 5.4.238, 5.10.176, 5.15.104, 6.1.21, 6.2.8 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.8 | High | CNA |
| CVSS 3.1 | 7.1 | High | NVD |
Official 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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
How developers prevent this class of flaw
- Use a language that provides appropriate memory abstractions.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
- git.kernel.org/stable/c/2fece63b55c5d74cd6f5de51159e2cde37e10555
- git.kernel.org/stable/c/4fc8fff378b2f2039f2a666d9f8c570f4e58352c
- git.kernel.org/stable/c/5a3fb3b745af0ce46ec2e0c8e507bae45b937334
- git.kernel.org/stable/c/61f306f8df0d5559659c5578cf6d95236bcdcb25
- git.kernel.org/stable/c/6936525142a015e854d0a23e9ad9ea0a28b3843d
- git.kernel.org/stable/c/bbf5eada4334a96e3a204b2307ff5b14dc380b0b
- git.kernel.org/stable/c/d9923e7214a870b312bf61f6a89c7554d0966985
Recent Out-of-bounds Read vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 7.1 High severity
- 8.8 High severity
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