CVE-2022-49065

MEDIUM EPSS 15.8%
Published Feb 26, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Fix the svc_deferred_event trace class Fix a NULL deref crash that occurs when an svc_rqst is deferred while the sunrpc tracing subsystem is enabled. svc_revisit() sets dr->xprt to NULL, so it can't be relied upon in the tracepoint to provide the remote's address. Unfortunately we can't revert the "svc_deferred_class" hunk in commit ece200ddd54b ("sunrpc: Save remote presentation address in svc_xprt for trace events") because there is now a specific check of event format specifiers for unsafe dereferences. The warning that check emits is: event svc_defer_recv has unsafe dereference of argument 1 A "%pISpc" format specifier with a "struct sockaddr *" is indeed flagged by this check. Instead, take the brute-force approach used by the svcrdma_qp_error tracepoint. Convert the dr::addr field into a presentation address in the TP_fast_assign() arm of the trace event, and store that as a string. This fix can be backported to -stable kernels. In the meantime, commit c6ced22997ad ("tracing: Update print fmt check to handle new __get_sockaddr() macro") is now in v5.18, so this wonky fix can be replaced with __sockaddr() and friends properly during the v5.19 merge window.

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
15.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 5

VendorProductVersionRange
linuxlinux_kernel*≥4.17  –  <5.10.112
linuxlinux_kernel*≥5.11  –  <5.15.35
linuxlinux_kernel*≥5.16  –  <5.17.4
linuxlinux_kernel5.18any
linuxlinux_kernel5.18any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/4d5004451ab2218eab94a30e1841462c9316ba19
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/726ae7300fcc25fefa46d188cc07eb16dc908f9e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/85ee17ca21cf92989e8c923e3ea4514c291e9d38
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c2456f470eea3bd06574d988bf6089e7c3f4c5cc
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/4d5004451ab2218eab94a30e1841462c9316ba19
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/726ae7300fcc25fefa46d188cc07eb16dc908f9e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/85ee17ca21cf92989e8c923e3ea4514c291e9d38
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c2456f470eea3bd06574d988bf6089e7c3f4c5cc
    Patch