5.5

CVE-2026-45846: linux NULL Pointer Dereference

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-45846DEBIAN-CVE-2026-45846
Published 27-05-2026Last modified 14-06-2026
Open JSON

Vulnerability summary

CVE-2026-45846 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 50 · Related 50
OPENSUSE-SU-2026:10954-1OPENSUSE-SU-2026:20965-1SUSE-SU-2026:22099-1SUSE-SU-2026:22108-1SUSE-SU-2026:22112-1SUSE-SU-2026:22117-1

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 14-06-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: bareudp: fix NULL pointer dereference in bareudp_fill_metadata_dst() bareudp_fill_metadata_dst() passes bareudp->sock to udp_tunnel6_dst_lookup() in the IPv6 path without a NULL check. The socket is only created in bareudp_open() and NULLed in bareudp_stop(), so calling this function while the device is down triggers a NULL dereference via sock->sk. BUG: kernel NULL pointer dereference, address: 0000000000000018 RIP: 0010:udp_tunnel6_dst_lookup (net/ipv6/ip6_udp_tunnel.c:160) Call Trace: <TASK> bareudp_fill_metadata_dst (drivers/net/bareudp.c:532) do_execute_actions (net/openvswitch/actions.c:901) ovs_execute_actions (net/openvswitch/actions.c:1589) ovs_packet_cmd_execute (net/openvswitch/datapath.c:700) genl_family_rcv_msg_doit (net/netlink/genetlink.c:1114) genl_rcv_msg (net/netlink/genetlink.c:1209) netlink_rcv_skb (net/netlink/af_netlink.c:2550) </TASK> Add a NULL check returning -ESHUTDOWN, consistent with the xmit paths in the same driver.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

+0.03 pp

From 0.13% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.16%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu154 products
  • linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded) | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded) | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 571912c69f0ed731bd1e071ade9dc7ca4aa52065, < 31e010a106ff6cd8ccac4bfee547fd3fa1015574 | ≥ 571912c69f0ed731bd1e071ade9dc7ca4aa52065, < 55193df8d6d33318435f19572bf5ea47a22eee28 | ≥ 571912c69f0ed731bd1e071ade9dc7ca4aa52065, < 51eef9c072aa3405a6823a96ae666d38a3b48750 | ≥ 571912c69f0ed731bd1e071ade9dc7ca4aa52065, < a0f4e4e8e0f5e24ddd83e3d1221732621cf34636 | ≥ 571912c69f0ed731bd1e071ade9dc7ca4aa52065, < 35a115a204be08f97450b0389413e218268ef4a2 | ≥ 571912c69f0ed731bd1e071ade9dc7ca4aa52065, < 74a02921c48fcd35a7881956c9e5c52b86595f5d | ≥ 571912c69f0ed731bd1e071ade9dc7ca4aa52065, < 638905520fc4fae6a80991563f264131545ba3df | ≥ 571912c69f0ed731bd1e071ade9dc7ca4aa52065, < aa6c6d9ee064aabfede4402fd1283424e649ca19 | 5.7
  • linux_kernel≥ 5.7, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.141 | ≥ 6.7, < 6.12.91 | ≥ 6.13, < 6.18.33 | ≥ 6.19, < 7.0.10 | 7.1:rc1
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.10-1

3 vendors · 157 products

References

51 links
Show all 51 references