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Oracle Linux: CVE-2021-47013: ELSA-2024-3618: kernel update (MODERATE) (Multiple Advisories)

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Oracle Linux: CVE-2021-47013: ELSA-2024-3618:kernel update (MODERATE) (Multiple Advisories)

Severity
6
CVSS
(AV:L/AC:H/Au:S/C:C/I:C/A:C)
Published
02/28/2024
Created
06/07/2024
Added
06/06/2024
Modified
11/29/2024

Description

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 an error path in the emac_tx_fill_tpd function. This flaw allows a local user to crash or potentially escalate their privileges on the system.

Solution(s)

  • oracle-linux-upgrade-kernel

References

  • https://attackerkb.com/topics/cve-2021-47013
  • CVE - 2021-47013
  • ELSA-2024-3618
  • 查看数 705
  • 已创建
  • 最后回复

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