CVE-2024-43835

MEDIUM EPSS 16.2%
Published Aug 17, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 17, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: virtio_net: Fix napi_skb_cache_put warning After the commit bdacf3e34945 ("net: Use nested-BH locking for napi_alloc_cache.") was merged, the following warning began to appear: WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0 __warn+0x12f/0x340 napi_skb_cache_put+0x82/0x4b0 napi_skb_cache_put+0x82/0x4b0 report_bug+0x165/0x370 handle_bug+0x3d/0x80 exc_invalid_op+0x1a/0x50 asm_exc_invalid_op+0x1a/0x20 __free_old_xmit+0x1c8/0x510 napi_skb_cache_put+0x82/0x4b0 __free_old_xmit+0x1c8/0x510 __free_old_xmit+0x1c8/0x510 __pfx___free_old_xmit+0x10/0x10 The issue arises because virtio is assuming it's running in NAPI context even when it's not, such as in the netpoll case. To resolve this, modify virtnet_poll_tx() to only set NAPI when budget is available. Same for virtnet_poll_cleantx(), which always assumed that it was in a NAPI context.

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
16.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 1

VendorProductVersionRange
linuxlinux_kernel*≥5.0  –  <6.10.3

References 9

  • git.kernel.org https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab
    Patch