CVE-2022-50454
In the Linux kernel, the following vulnerability has been resolved: drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table() nouveau_bo_init() is backed by ttm_bo_init() and ferries its return code back to the caller.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). 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: drm/nouveau: fix a use-after-free in nouveau_gem_prime_import_sg_table() nouveau_bo_init() is backed by ttm_bo_init() and ferries its return code back to the caller. On failures, ttm will call nouveau_bo_del_ttm() and free the memory.Thus, when nouveau_bo_init() returns an error, the gem object has already been released. Then the call to nouveau_bo_ref() will use the freed "nvbo->bo" and lead to a use-after-free bug. We should delete the call to nouveau_bo_ref() to avoid the use-after-free.
- 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
- 0.16% probability · 5th 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/3aeda2fe6517cc52663d4ce3588dd43f0d4124a7Patch
- https://git.kernel.org/stable/c/540dfd188ea2940582841c1c220bd035a7db0e51Patch
- https://git.kernel.org/stable/c/56ee9577915dc06f55309901012a9ef68dbdb5a8Patch
- https://git.kernel.org/stable/c/5d6093c49c098d86c7b136aba9922df44aeb6944Patch
- https://git.kernel.org/stable/c/7d80473e9f12548ac05b36af4fb9ce80f2f73509Patch
- https://git.kernel.org/stable/c/861f085f81fd569b02cc2c11165a9e6cca144424Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.