CVE-2021-47235
net: ethernet: fix potential use-after-free in ec_bhf_remove
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved:
net: ethernet: fix potential use-after-free in ec_bhf_remove
static void ec_bhf_remove(struct pci_dev *dev)
{
...
struct ec_bhf_priv *priv = netdev_priv(net_dev);
unregister_netdev(net_dev);
free_netdev(net_dev);
pci_iounmap(dev, priv->dma_io);
pci_iounmap(dev, priv->io);
...
}
priv is netdev private data, but it is used
after free_netdev(). It can cause use-after-free when accessing priv
pointer. So, fix it by moving free_netdev() after pci_iounmap()
calls.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: ethernet: soluciona el posible use after free en ec_bhf_remove static void ec_bhf_remove(struct pci_dev *dev) { ... struct ec_bhf_priv *priv = netdev_priv(net_dev); anular el registro_netdev(net_dev); free_netdev(net_dev); pci_iounmap(dev, priv->dma_io); pci_iounmap(dev, priv->io); ... } priv son datos privados de netdev, pero se usan después de free_netdev(). Puede causar use after free al acceder al puntero privado. Entonces, solucionelo moviendo free_netdev() después de las llamadas a pci_iounmap().
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-04-10 CVE Reserved
- 2024-05-21 CVE Published
- 2024-05-22 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/6af55ff52b02d492d45db88df3e461fa51a6f753 | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.15 < 4.4.274 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.15 < 4.4.274" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.15 < 4.9.274 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.15 < 4.9.274" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.15 < 4.14.238 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.15 < 4.14.238" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.15 < 4.19.196 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.15 < 4.19.196" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.15 < 5.4.128 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.15 < 5.4.128" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.15 < 5.10.46 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.15 < 5.10.46" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.15 < 5.12.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.15 < 5.12.13" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 3.15 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.15 < 5.13" | en |
Affected
| ||||||