PT-2024-11367 · Linux+2 · Linux Kernel+2
Syzbot
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Published
2021-09-22
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Updated
2024-06-25
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CVE-2021-47370
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 5.14.0-syzkaller
Description
The issue arises from a signed/unsigned comparison in the expression
info->size goal - skb->len > 0, which evaluates to true when the size goal is smaller than the skb size. This results in a lack of tx cache refill, causing the skb allocated by the core TCP code to lack the required MPTCP skb extensions. The vulnerability can be triggered by syzbot, leading to a WARN ON() warning.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
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Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Suse