Dashboard / CVE-2026-52994

CVE-2026-52994

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 36/100
Published: 2026-06-24 Modified: 2026-11-06 First seen: 2026-11-06 Status: active

Attack Surface

Low Complexity No Interaction

CVSS Vector Breakdown

AV: Local
AC: Low
PR: Low
UI: None
S: Unchanged
C: None
I: None
A: High

Description

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix MSG_ZEROCOPY pinned-pages accounting virtio_transport_init_zcopy_skb() uses iter->count as the size argument for msg_zerocopy_realloc(), which in turn passes it to mm_account_pinned_pages() for RLIMIT_MEMLOCK accounting. However, this function is called after virtio_transport_fill_skb() has already consumed the iterator via __zerocopy_sg_from_iter(), so on the last skb, iter->count will be 0, skipping the RLIMIT_MEMLOCK enforcement. Pass pkt_len (the total bytes being sent) as an explicit parameter to virtio_transport_init_zcopy_skb() instead of reading the already-consumed iter->count. This matches TCP and UDP, which both call msg_zerocopy_realloc() with the original message size.

Affected Software (5)

VendorProductVersion
Linux Linux 581512a6dc939ef122e49336626ae159f3b8a345 < 6af1736b5810bc8a4a43a8518530113f5a757dc1
Linux Linux 581512a6dc939ef122e49336626ae159f3b8a345 < d0117950075f0a9d5944980784c719d8ebcd4bff
Linux Linux 581512a6dc939ef122e49336626ae159f3b8a345 < 1cb36e252211506f51095fe7ced8286cc77b4c80
Linux Linux 6.7
linux linux_kernel 6.7 – 6.18.33

References & Advisories (3)

Bug Bounty Relevance

36 / 100
✓ Low complexity
✓ No user interaction

CVSS Score

5.5 / 10.0 v3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.13%
Raw Score 0.001260
Percentile 2.3%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00126
2026-11-12
0.00126
2026-11-10
0.00126
2026-11-09
0.00126
2026-11-08
0.00126
2026-11-07
0.00126
2026-11-06
0.00126

Intelligence Sources

mitre ref →
nvd ref →

External Links