Security Vulnerabilities
In the Linux kernel, the following vulnerability has been resolved:
scsi: target: configfs: Bound snprintf() return in tg_pt_gp_members_show()
target_tg_pt_gp_members_show() formats LUN paths with snprintf() into a
256-byte stack buffer, then will memcpy() cur_len bytes from that
buffer. snprintf() returns the length the output would have had, which
can exceed the buffer size when the fabric WWN is long because iSCSI IQN
names can be up to 223 bytes. The check at the memcpy() site only
guards the destination page write, not the source read, so memcpy() will
read past the stack buffer and copy adjacent stack contents to the sysfs
reader, which when CONFIG_FORTIFY_SOURCE is enabled, fortify_panic()
will be triggered.
Commit 27e06650a5ea ("scsi: target: target_core_configfs: Add length
check to avoid buffer overflow") added the same bound to the
target_lu_gp_members_show() but the tg_pt_gp variant was missed so
resolve that here.
CVSS Score
7.1
EPSS Score
0.0
Published
2026-05-28
In the Linux kernel, the following vulnerability has been resolved:
fanotify: fix false positive on permission events
fsnotify_get_mark_safe() may return false for a mark on an unrelated group,
which results in bypassing the permission check.
Fix by skipping over detached marks that are not in the current group.
CVSS Score
7.1
EPSS Score
0.0
Published
2026-05-28
In the Linux kernel, the following vulnerability has been resolved:
usb: usblp: fix heap leak in IEEE 1284 device ID via short response
usblp_ctrl_msg() collapses the usb_control_msg() return value to
0/-errno, discarding the actual number of bytes transferred. A broken
printer can complete the GET_DEVICE_ID control transfer short and the
driver has no way to know.
usblp_cache_device_id_string() reads the 2-byte big-endian length prefix
from the response and trusts it (clamped only to the buffer bounds).
The buffer is kmalloc(1024) at probe time. A device that sends exactly
two bytes (e.g. 0x03 0xFF, claiming a 1023-byte ID) leaves
device_id_string[2..1022] holding stale kmalloc heap.
That stale data is then exposed:
- via the ieee1284_id sysfs attribute (sprintf("%s", buf+2), truncated
at the first NUL in the stale heap), and
- via the IOCNR_GET_DEVICE_ID ioctl, which copy_to_user()s the full
claimed length regardless of NULs, up to 1021 bytes of uninitialized
heap, with the leak size chosen by the device.
Fix this up by just zapping the buffer with zeros before each request
sent to the device.
CVSS Score
5.5
EPSS Score
0.0
Published
2026-05-28
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: drop stray 'static' from fast-RX rx_result
ieee80211_invoke_fast_rx() is documented as safe for parallel RX, but
its per-invocation rx_result is declared static. Concurrent callers then
share one instance and can overwrite each other's result between
ieee80211_rx_mesh_data() and the switch on res.
That can make a packet that was queued or consumed by
ieee80211_rx_mesh_data() fall through into ieee80211_rx_8023(), or make
a packet that should continue return as queued.
Make res an automatic variable so each invocation keeps its own result.
CVSS Score
8.8
EPSS Score
0.0
Published
2026-05-28
In the Linux kernel, the following vulnerability has been resolved:
8021q: delete cleared egress QoS mappings
vlan_dev_set_egress_priority() currently keeps cleared egress
priority mappings in the hash as tombstones. Repeated set/clear cycles
with distinct skb priorities therefore accumulate mapping nodes until
device teardown and leak memory.
Delete mappings when vlan_prio is cleared instead of keeping tombstones.
Now that the egress mapping lists are RCU protected, the node can be
unlinked safely and freed after a grace period.
CVSS Score
5.5
EPSS Score
0.0
Published
2026-05-28
Relative Path Traversal vulnerability in Apache Ignite REST API.
Authenticated REST API users can read any file on the server with "cmd=log" command and a log path crafted in a certain way.
This issue affects Apache Ignite: from 2.0.0 through 2.17.0.
Users are recommended to upgrade to version 2.18.0, which fixes the issue.
CVSS Score
8.5
EPSS Score
0.001
Published
2026-05-28
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.9 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that under certain conditions could have allowed a blocked Project Access Token to continue accessing private resources due to incorrect authorization enforcement.
CVSS Score
4.3
EPSS Score
0.0
Published
2026-05-28
A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the "check password script" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the "check password script" is used with %u and the samba-dcerpcd service is started as a system service.
CVSS Score
9.0
EPSS Score
0.01
Published
2026-05-28
A flaw was found in Keycloak, an open-source identity and access management solution. When a user account is temporarily locked due to repeated failed login attempts, an attacker with valid client credentials can exploit the Client-Initiated Backchannel Authentication (CIBA) flow to bypass this brute-force protection. This allows continued authentication attempts and token issuance even when the account should be locked, potentially enabling further unauthorized access attempts.
CVSS Score
4.3
EPSS Score
0.001
Published
2026-05-28
A flaw was found in Keycloak. A remote attacker with high privileges, such as a realm administrator configuring a malicious Lightweight Directory Access Protocol (LDAP) server or an attacker compromising an upstream LDAP server, could exploit this vulnerability. By sending a malformed LDAP password policy response during a password authentication request, the attacker can trigger an OutOfMemoryError. This causes the Keycloak Java Virtual Machine (JVM) to terminate, leading to a denial of service (DoS) for all realms on the affected node.
CVSS Score
4.9
EPSS Score
0.003
Published
2026-05-28