CVE-2021-47223
published 2024-05-21CVE-2021-47223: In the Linux kernel, the following vulnerability has been resolved: net: bridge: fix vlan tunnel dst null pointer dereference This patch fixes a tunnel_dst…
PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
14.7th percentile
In the Linux kernel, the following vulnerability has been resolved:
net: bridge: fix vlan tunnel dst null pointer dereference
This patch fixes a tunnel_dst null pointer dereference due to lockless
access in the tunnel egress path. When deleting a vlan tunnel the
tunnel_dst pointer is set to NULL without waiting a grace period (i.e.
while it's still usable) and packets egressing are dereferencing it
without checking. Use READ/WRITE_ONCE to annotate the lockless use of
tunnel_id, use RCU for accessing tunnel_dst and make sure it is read
only once and checked in the egress path. The dst is already properly RCU
protected so we don't need to do anything fancy than to make sure
tunnel_id and tunnel_dst are read only once and checked in the egress path.
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.10.46-1 (bookworm) | linux 5.10.46-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= 11538d039ac6efcf4f1a6c536e1b87cd3668a9fd < ad7feefe7164892db424c45687472db803d87f79 | ad7feefe7164892db424c45687472db803d87f79 |
| linux | linux | >= 11538d039ac6efcf4f1a6c536e1b87cd3668a9fd < 24a6e55f17aa123bc1fc54b7d3c410b41bc16530 | 24a6e55f17aa123bc1fc54b7d3c410b41bc16530 |
| linux | linux | >= 11538d039ac6efcf4f1a6c536e1b87cd3668a9fd < a2241e62f6b4a774d8a92048fdf59c45f6c2fe5c | a2241e62f6b4a774d8a92048fdf59c45f6c2fe5c |
| linux | linux | >= 11538d039ac6efcf4f1a6c536e1b87cd3668a9fd < fe0448a3fad365a747283a00a1d1ad5e8d6675b7 | fe0448a3fad365a747283a00a1d1ad5e8d6675b7 |
| linux | linux | >= 11538d039ac6efcf4f1a6c536e1b87cd3668a9fd < abb02e05cb1c0a30dd873a29f33bc092067dc35d | abb02e05cb1c0a30dd873a29f33bc092067dc35d |
| linux | linux | >= 11538d039ac6efcf4f1a6c536e1b87cd3668a9fd < 58e2071742e38f29f051b709a5cca014ba51166f | 58e2071742e38f29f051b709a5cca014ba51166f |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 0 < 5.10.46-1 | 5.10.46-1 |
| linux | linux_kernel | >= 4.11 < 4.14.238 | 4.14.238 |
| linux | linux_kernel | >= 4.15 < 4.19.196 | 4.19.196 |
| linux | linux_kernel | >= 4.20 < 5.4.128 | 5.4.128 |
| linux | linux_kernel | >= 5.11 < 5.12.13 | 5.12.13 |
| linux | linux_kernel | >= 5.5 < 5.10.46 | 5.10.46 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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OSV
CVE-2021-47223: In the Linux kernel, the following vulnerability has been resolved: net: bridge: fix vlan tunnel dst null pointer dereference This patch fixes a tunne
osv·2024-05-21·CVSS 5.5
CVE-2021-47223 [MEDIUM] CVE-2021-47223: In the Linux kernel, the following vulnerability has been resolved: net: bridge: fix vlan tunnel dst null pointer dereference This patch fixes a tunne
In the Linux kernel, the following vulnerability has been resolved: net: bridge: fix vlan tunnel dst null pointer dereference This patch fixes a tunnel_dst null pointer dereference due to lockless access in the tunnel egress path. When deleting a vlan tunnel the tunnel_dst pointer is set to NULL without waiting a grace period (i.e. while it's still usable) and packets egressing are dereferencing it without checking. Use READ/WRITE_ONCE to annotate the lockless use of tunnel_id, use RCU for accessing tunnel_dst and make sure it is read only once and checked in the egress path. The dst is already properly RCU protected so we don't need to do anything fancy than to make sure tunnel_id and tunnel_dst are read only once and checked in the egress path.
GHSA
GHSA-8q2m-46mc-pjw4: In the Linux kernel, the following vulnerability has been resolved:
net: bridge: fix vlan tunnel dst null pointer dereference
This patch fixes a tun
ghsa_unreviewed·2024-05-21
CVE-2021-47223 [MEDIUM] CWE-476 GHSA-8q2m-46mc-pjw4: In the Linux kernel, the following vulnerability has been resolved:
net: bridge: fix vlan tunnel dst null pointer dereference
This patch fixes a tun
In the Linux kernel, the following vulnerability has been resolved:
net: bridge: fix vlan tunnel dst null pointer dereference
This patch fixes a tunnel_dst null pointer dereference due to lockless
access in the tunnel egress path. When deleting a vlan tunnel the
tunnel_dst pointer is set to NULL without waiting a grace period (i.e.
while it's still usable) and packets egressing are dereferencing it
without checking. Use READ/WRITE_ONCE to annotate the lockless use of
tunnel_id, use RCU for accessing tunnel_dst and make sure it is read
only once and checked in the egress path. The dst is already properly RCU
protected so we don't need to do anything fancy than to make sure
tunnel_id and tunnel_dst are read only once and checked in the egress path.
Red Hat
kernel: net: bridge: fix vlan tunnel dst null pointer dereference
vendor_redhat·2024-05-21·CVSS 5.5
CVE-2021-47223 [MEDIUM] CWE-476 kernel: net: bridge: fix vlan tunnel dst null pointer dereference
kernel: net: bridge: fix vlan tunnel dst null pointer dereference
In the Linux kernel, the following vulnerability has been resolved:
net: bridge: fix vlan tunnel dst null pointer dereference
This patch fixes a tunnel_dst null pointer dereference due to lockless
access in the tunnel egress path. When deleting a vlan tunnel the
tunnel_dst pointer is set to NULL without waiting a grace period (i.e.
while it's still usable) and packets egressing are dereferencing it
without checking. Use READ/WRITE_ONCE to annotate the lockless use of
tunnel_id, use RCU for accessing tunnel_dst and make sure it is read
only once and checked in the egress path. The dst is already properly RCU
protected so we don't need to do anything fancy than to make sure
tunnel_id and tunnel_dst are read only once and chec
Debian
CVE-2021-47223: linux - In the Linux kernel, the following vulnerability has been resolved: net: bridge...
vendor_debian·2021·CVSS 5.5
CVE-2021-47223 [MEDIUM] CVE-2021-47223: linux - In the Linux kernel, the following vulnerability has been resolved: net: bridge...
In the Linux kernel, the following vulnerability has been resolved: net: bridge: fix vlan tunnel dst null pointer dereference This patch fixes a tunnel_dst null pointer dereference due to lockless access in the tunnel egress path. When deleting a vlan tunnel the tunnel_dst pointer is set to NULL without waiting a grace period (i.e. while it's still usable) and packets egressing are dereferencing it without checking. Use READ/WRITE_ONCE to annotate the lockless use of tunnel_id, use RCU for accessing tunnel_dst and make sure it is read only once and checked in the egress path. The dst is already properly RCU protected so we don't need to do anything fancy than to make sure tunnel_id and tunnel_dst are read only once and checked in the egress path.
Scope: local
bookworm: resolved (fixed in 5
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/24a6e55f17aa123bc1fc54b7d3c410b41bc16530https://git.kernel.org/stable/c/58e2071742e38f29f051b709a5cca014ba51166fhttps://git.kernel.org/stable/c/a2241e62f6b4a774d8a92048fdf59c45f6c2fe5chttps://git.kernel.org/stable/c/abb02e05cb1c0a30dd873a29f33bc092067dc35dhttps://git.kernel.org/stable/c/ad7feefe7164892db424c45687472db803d87f79https://git.kernel.org/stable/c/fe0448a3fad365a747283a00a1d1ad5e8d6675b7https://git.kernel.org/stable/c/24a6e55f17aa123bc1fc54b7d3c410b41bc16530https://git.kernel.org/stable/c/58e2071742e38f29f051b709a5cca014ba51166fhttps://git.kernel.org/stable/c/a2241e62f6b4a774d8a92048fdf59c45f6c2fe5chttps://git.kernel.org/stable/c/abb02e05cb1c0a30dd873a29f33bc092067dc35dhttps://git.kernel.org/stable/c/ad7feefe7164892db424c45687472db803d87f79https://git.kernel.org/stable/c/fe0448a3fad365a747283a00a1d1ad5e8d6675b7
2024-05-21
Published