CVE-2021-47485
In the Linux kernel, the following vulnerability has been resolved: IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields Overflowing either addrlimit or bytes_togo can allow userspace to trigger a buffer overflow of kernel memory.
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: IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields Overflowing either addrlimit or bytes_togo can allow userspace to trigger a buffer overflow of kernel memory. Check for overflows in all the places doing math on user controlled buffers.
- 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 · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-120
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/0d4395477741608d123dad51def9fe50b7ebe952Patch
- https://git.kernel.org/stable/c/0f8cdfff06829a0b0348b6debc29ff6a61967724Patch
- https://git.kernel.org/stable/c/3f57c3f67fd93b4da86aeffea1ca32c484d054adPatch
- https://git.kernel.org/stable/c/60833707b968d5ae02a75edb7886dcd4a957cf0dPatch
- https://git.kernel.org/stable/c/73d2892148aa4397a885b4f4afcfc5b27a325c42Patch
- https://git.kernel.org/stable/c/bda41654b6e0c125a624ca35d6d20beb8015b5d0Patch
- https://git.kernel.org/stable/c/c3e17e58f571f34c51aeb17274ed02c2ed5cf780Patch
- https://git.kernel.org/stable/c/d39bf40e55e666b5905fdbd46a0dced030ce87bePatch
- https://git.kernel.org/stable/c/0d4395477741608d123dad51def9fe50b7ebe952Patch
- https://git.kernel.org/stable/c/0f8cdfff06829a0b0348b6debc29ff6a61967724Patch
- https://git.kernel.org/stable/c/3f57c3f67fd93b4da86aeffea1ca32c484d054adPatch
- https://git.kernel.org/stable/c/60833707b968d5ae02a75edb7886dcd4a957cf0dPatch
- https://git.kernel.org/stable/c/73d2892148aa4397a885b4f4afcfc5b27a325c42Patch
- https://git.kernel.org/stable/c/bda41654b6e0c125a624ca35d6d20beb8015b5d0Patch
- https://git.kernel.org/stable/c/c3e17e58f571f34c51aeb17274ed02c2ed5cf780Patch
- https://git.kernel.org/stable/c/d39bf40e55e666b5905fdbd46a0dced030ce87bePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.