CVE-2022-48819

MEDIUM EPSS 13.6%
Published Jul 16, 20241y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 16, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: tcp: take care of mixed splice()/sendmsg(MSG_ZEROCOPY) case syzbot found that mixing sendpage() and sendmsg(MSG_ZEROCOPY) calls over the same TCP socket would again trigger the infamous warning in inet_sock_destruct() WARN_ON(sk_forward_alloc_get(sk)); While Talal took into account a mix of regular copied data and MSG_ZEROCOPY one in the same skb, the sendpage() path has been forgotten. We want the charging to happen for sendpage(), because pages could be coming from a pipe. What is missing is the downgrading of pure zerocopy status to make sure sk_forward_alloc will stay synced. Add tcp_downgrade_zcopy_pure() helper so that we can use it from the two callers.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
13.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 4

VendorProductVersionRange
linuxlinux_kernel*≥5.16  –  <5.16.10
linuxlinux_kernel5.17any
linuxlinux_kernel5.17any
linuxlinux_kernel5.17any

References 2

  • git.kernel.org https://git.kernel.org/stable/c/47f3860c4931175f112f28dcac66eacca9b1040f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f8d9d938514f46c4892aff6bfe32f425e84d81cc
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/47f3860c4931175f112f28dcac66eacca9b1040f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f8d9d938514f46c4892aff6bfe32f425e84d81cc
    Patch