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CVE-2021-47013

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2024-3810-03: Posted Jun 12, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-3810-03 - An update for kernel is now available for Red Hat Enterprise Linux 8.8 Extended Update Support. Issues addressed include null pointer and use-after-free vulnerabilities.; tags | advisory, kernel, vulnerability; systems | linux, redhat; advisories | CVE-2021-47013; SHA-256 | df58e9d7538288d67b5f925d7433a1dc3632dac80fb2f688da69f197b80f7bd8; Download | Favorite | View

Red Hat Security Advisory 2024-3462-03: Posted May 29, 2024; Authored by Red Hat | Site access.redhat.com; Red Hat Security Advisory 2024-3462-03 - An update for kernel is now available for Red Hat Enterprise Linux 8.6 Extended Update Support. Issues addressed include a use-after-free vulnerability.; tags | advisory, kernel; systems | linux, redhat; advisories | CVE-2021-47013; SHA-256 | d72c2e9758adff9f1d07c56b3500c51817e271488f992b5e688851a713d3a712; Download | Favorite | View

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CVE-2021-47013

Overview

Related Files

File Archive:

September 2024

Top Authors In Last 30 Days

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