CVE-2026-68288 Affecting kernel-default-extra package, versions <6.4.0-150700.53.81.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-SLES157-KERNELDEFAULTEXTRA-19915652
- published18 Sept 2026
- disclosed17 Sept 2026
Introduced: 17 Sep 2026
NewCVE-2026-68288 (opens in a new tab)How to fix?
Upgrade SLES:15.7 kernel-default-extra to version 6.4.0-150700.53.81.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-default-extra package and not the kernel-default-extra package as distributed by SLES.
See How to fix? for SLES:15.7 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD
net_dm_packet_report_fill() and net_dm_hw_packet_report_fill() open code the NET_DM_ATTR_PAYLOAD attribute to avoid zeroing the packet payload before overwriting it with skb_copy_bits().
skb_put() reserves nla_total_size(payload_len), i.e. the header plus the NLA_ALIGN() padding, but only payload_len bytes are copied in. When payload_len is not a multiple of 4 the 1-3 padding bytes are never initialized and are leaked to user space inside the netlink message.
KMSAN confirms the leak for the software path when the packet payload length is not 4-byte aligned:
BUG: KMSAN: kernel-infoleak in _copy_to_iter _copy_to_iter __skb_datagram_iter skb_copy_datagram_iter netlink_recvmsg sock_recvmsg __sys_recvfrom Uninit was created at: kmem_cache_alloc_node_noprof __alloc_skb net_dm_packet_work Bytes 173-175 of 176 are uninitialized
Use __nla_reserve(), which sets up the attribute header and zeroes the padding, instead of open coding the attribute construction.
References
- https://www.suse.com/security/cve/CVE-2026-68288.html
- https://bugzilla.suse.com/1275975
- https://git.kernel.org/stable/c/5e9c8baee0329fbefe7c67aea945e2a07f15e98b
- https://git.kernel.org/stable/c/8fd6975d2aecc36b25ee82b6aef88e62a3527ccb
- https://git.kernel.org/stable/c/05173de42a9923a3eaadebcb0dd5bc83ffba174c
- https://git.kernel.org/stable/c/89178ffe5bddc99c057ba2768db1f8d9c5e1408c