VulnerabilityAnalyzed
CVE-2021-47669
In the Linux kernel, the following vulnerability has been resolved: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe.
HIGH 7.8EPSS 0.18%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.18%). 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: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().
- 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
- 0.18% probability · 8th 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/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105Patch
- https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cbPatch
- https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052Patch
- https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70Patch
- https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.