CVE-2021-47372
In the Linux kernel, the following vulnerability has been resolved: net: macb: fix use after free on rmmod plat_dev->dev->platform_data is released by platform_device_unregister(), use of pclk and hclk is a use-after-free.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: net: macb: fix use after free on rmmod plat_dev->dev->platform_data is released by platform_device_unregister(), use of pclk and hclk is a use-after-free. Since device unregister won't need a clk device we adjust the function call sequence to fix this issue. [ 31.261225] BUG: KASAN: use-after-free in macb_remove+0x77/0xc6 [macb_pci] [ 31.275563] Freed by task 306: [ 30.276782] platform_device_release+0x25/0x80
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.24% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/1da750d1e2140ef43d64d17f301ff6f41b45541ePatch
- https://git.kernel.org/stable/c/46670fb832ee80943715df618632ca13c2e96f2bPatch
- https://git.kernel.org/stable/c/4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5Patch
- https://git.kernel.org/stable/c/7721221e87d25c9840d9ca6b986dbdc410d5ce2bPatch
- https://git.kernel.org/stable/c/a7d521cc726f30b8e679a6f36d04b18a8ab3c536Patch
- https://git.kernel.org/stable/c/d82d5303c4c539db86588ffb5dc5b26c3f1513e8Patch
- https://git.kernel.org/stable/c/1da750d1e2140ef43d64d17f301ff6f41b45541ePatch
- https://git.kernel.org/stable/c/46670fb832ee80943715df618632ca13c2e96f2bPatch
- https://git.kernel.org/stable/c/4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5Patch
- https://git.kernel.org/stable/c/7721221e87d25c9840d9ca6b986dbdc410d5ce2bPatch
- https://git.kernel.org/stable/c/a7d521cc726f30b8e679a6f36d04b18a8ab3c536Patch
- https://git.kernel.org/stable/c/d82d5303c4c539db86588ffb5dc5b26c3f1513e8Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.