CVE-2021-47013
published 2024-02-28CVE-2021-47013: In the Linux kernel, the following vulnerability has been resolved: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send In emac_mac_tx_buf_send, it…
PriorityP337high7.8CVSS 3.1
AVLACLPRLUINSUCHIHAH
EPSS
0.26%
17.5th percentile
In the Linux kernel, the following vulnerability has been resolved:
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..).
If some error happens in emac_tx_fill_tpd(), the skb will be freed via
dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd().
But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len).
As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len,
thus my patch assigns skb->len to 'len' before the possible free and
use 'len' instead of skb->len later.
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.10.38-1 (bookworm) | linux 5.10.38-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= b9b17debc69d27cd55e21ee51a5ba7fc50a426cf < c7f75d11fe72913d2619f97b2334b083cd7bb955 | c7f75d11fe72913d2619f97b2334b083cd7bb955 |
| linux | linux | >= b9b17debc69d27cd55e21ee51a5ba7fc50a426cf < dc1b438a35773d030be0ee80d9c635c3e558a322 | dc1b438a35773d030be0ee80d9c635c3e558a322 |
| linux | linux | >= b9b17debc69d27cd55e21ee51a5ba7fc50a426cf < 16d8c44be52e3650917736d45f5904384a9da834 | 16d8c44be52e3650917736d45f5904384a9da834 |
| linux | linux | >= b9b17debc69d27cd55e21ee51a5ba7fc50a426cf < 55fcdd1258faaecca74b91b88cc0921f9edd775d | 55fcdd1258faaecca74b91b88cc0921f9edd775d |
| linux | linux | >= b9b17debc69d27cd55e21ee51a5ba7fc50a426cf < 9dc373f74097edd0e35f3393d6248eda8d1ba99d | 9dc373f74097edd0e35f3393d6248eda8d1ba99d |
| linux | linux | >= b9b17debc69d27cd55e21ee51a5ba7fc50a426cf < 8c06f34785068b87e2b560534c77c163d6c6dca7 | 8c06f34785068b87e2b560534c77c163d6c6dca7 |
| linux | linux | >= b9b17debc69d27cd55e21ee51a5ba7fc50a426cf < e407495ba6788a67d1bd41714158c079e340879b | e407495ba6788a67d1bd41714158c079e340879b |
| linux | linux | >= b9b17debc69d27cd55e21ee51a5ba7fc50a426cf < 6d72e7c767acbbdd44ebc7d89c6690b405b32b57 | 6d72e7c767acbbdd44ebc7d89c6690b405b32b57 |
| linux | linux_kernel | >= 0 < 5.10.38-1 | 5.10.38-1 |
| linux | linux_kernel | >= 0 < 5.10.38-1 | 5.10.38-1 |
| linux | linux_kernel | >= 0 < 5.10.38-1 | 5.10.38-1 |
| linux | linux_kernel | >= 0 < 5.10.38-1 | 5.10.38-1 |
| linux | linux_kernel | >= 4.10 < 4.14.233 | 4.14.233 |
| linux | linux_kernel | >= 4.15 < 4.19.191 | 4.19.191 |
| linux | linux_kernel | >= 4.20 < 5.4.119 | 5.4.119 |
| linux | linux_kernel | >= 4.9 < 4.9.269 | 4.9.269 |
| linux | linux_kernel | >= 5.11 < 5.11.21 | 5.11.21 |
| linux | linux_kernel | >= 5.12 < 5.12.4 | 5.12.4 |
| linux | linux_kernel | >= 5.5 < 5.10.37 | 5.10.37 |
CVSS provenance
nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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GHSA
GHSA-3ch6-f277-559q: In the Linux kernel, the following vulnerability has been resolved:
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
In emac_mac_tx_b
ghsa_unreviewed·2024-02-28
CVE-2021-47013 [HIGH] CWE-416 GHSA-3ch6-f277-559q: In the Linux kernel, the following vulnerability has been resolved:
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
In emac_mac_tx_b
In the Linux kernel, the following vulnerability has been resolved:
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..).
If some error happens in emac_tx_fill_tpd(), the skb will be freed via
dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd().
But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len).
As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len,
thus my patch assigns skb->len to 'len' before the possible free and
use 'len' instead of skb->len later.
OSV
CVE-2021-47013: In the Linux kernel, the following vulnerability has been resolved: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send In emac_mac_tx_buf
osv·2024-02-28·CVSS 7.8
CVE-2021-47013 [HIGH] CVE-2021-47013: In the Linux kernel, the following vulnerability has been resolved: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send In emac_mac_tx_buf
In the Linux kernel, the following vulnerability has been resolved: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..). If some error happens in emac_tx_fill_tpd(), the skb will be freed via dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd(). But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len). As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len, thus my patch assigns skb->len to 'len' before the possible free and use 'len' instead of skb->len later.
Red Hat
kernel: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
vendor_redhat·2024-02-28·CVSS 7.8
CVE-2021-47013 [HIGH] CWE-416 kernel: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
kernel: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
In the Linux kernel, the following vulnerability has been resolved:
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..).
If some error happens in emac_tx_fill_tpd(), the skb will be freed via
dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd().
But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len).
As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len,
thus my patch assigns skb->len to 'len' before the possible free and
use 'len' instead of skb->len later.
A use-after-free flaw was found in the Linux kernel’s Qualcomm Gigabit Ethernet Media Access Controller (EMAC) driver in how a user triggers
Debian
CVE-2021-47013: linux - In the Linux kernel, the following vulnerability has been resolved: net:emac/em...
vendor_debian·2021·CVSS 7.8
CVE-2021-47013 [HIGH] CVE-2021-47013: linux - In the Linux kernel, the following vulnerability has been resolved: net:emac/em...
In the Linux kernel, the following vulnerability has been resolved: net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..). If some error happens in emac_tx_fill_tpd(), the skb will be freed via dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd(). But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len). As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len, thus my patch assigns skb->len to 'len' before the possible free and use 'len' instead of skb->len later.
Scope: local
bookworm: resolved (fixed in 5.10.38-1)
bullseye: resolved (fixed in 5.10.38-1)
forky: resolved (fixed in 5.10.38-1)
sid: resolved (fixed in 5.10.38-1)
trixie: resolved (fixed in 5.10.38-1)
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775dhttps://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99dhttps://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879bhttps://git.kernel.org/stable/c/16d8c44be52e3650917736d45f5904384a9da834https://git.kernel.org/stable/c/55fcdd1258faaecca74b91b88cc0921f9edd775dhttps://git.kernel.org/stable/c/6d72e7c767acbbdd44ebc7d89c6690b405b32b57https://git.kernel.org/stable/c/8c06f34785068b87e2b560534c77c163d6c6dca7https://git.kernel.org/stable/c/9dc373f74097edd0e35f3393d6248eda8d1ba99dhttps://git.kernel.org/stable/c/c7f75d11fe72913d2619f97b2334b083cd7bb955https://git.kernel.org/stable/c/dc1b438a35773d030be0ee80d9c635c3e558a322https://git.kernel.org/stable/c/e407495ba6788a67d1bd41714158c079e340879b
2024-02-28
Published