CVE-2025-40123

Ecosystem	Package	Version

Vulnerabilities

CVE-2025-40123

In the Linux kernel, the following vulnerability has been resolved: bpf: Enforce expected_attach_type for tailcall compatibility Yinhao et al. recently reported: Our fuzzer tool discovered an uninitialized pointer issue in the bpf_prog_test_run_xdp() function within the Linux kernel's BPF subsystem. This leads to a NULL pointer dereference when a BPF program attempts to deference the txq member of struct xdp_buff object. The test initializes two programs of BPF_PROG_TYPE_XDP: progA acts as the entry point for bpf_prog_test_run_xdp() and its expected_attach_type can neither be of be BPF_XDP_DEVMAP nor BPF_XDP_CPUMAP. progA calls into a slot of a tailcall map it owns. progB's expected_attach_type must be BPF_XDP_DEVMAP to pass xdp_is_valid_access() validation. The program returns struct xdp_md's egress_ifindex, and the latter is only allowed to be accessed under mentioned expected_attach_type. progB is then inserted into the tailcall which progA calls. The underlying issue goes beyond XDP though. Another example are programs of type BPF_PROG_TYPE_CGROUP_SOCK_ADDR. sock_addr_is_valid_access() as well as sock_addr_func_proto() have different logic depending on the programs' expected_attach_type. Similarly, a program attached to BPF_CGROUP_INET4_GETPEERNAME should not be allowed doing a tailcall into a program which calls bpf_bind() out of BPF which is only enabled for BPF_CGROUP_INET4_CONNECT. In short, specifying expected_attach_type allows to open up additional functionality or restrictions beyond what the basic bpf_prog_type enables. The use of tailcalls must not violate these constraints. Fix it by enforcing expected_attach_type in __bpf_prog_map_compatible(). Note that we only enforce this for tailcall maps, but not for BPF devmaps or cpumaps: There, the programs are invoked through dev_map_bpf_prog_run*() and cpu_map_bpf_prog_run*() which set up a new environment / context and therefore these situations are not prone to this issue.

Published Nov 14, 2025

https://lore.kernel.org/linux-cve-announce/2025111253-CVE-2025-40123-fcb1@gregkh/


rpm	kernel	4.18.0-147.0.2.el8_1
rpm	kernel	4.18.0-147.0.3.el8_1
rpm	kernel	4.18.0-147.3.1.el8_1
rpm	kernel	4.18.0-147.5.1.el8_1
rpm	kernel	4.18.0-147.8.1.el8_1
rpm	kernel	4.18.0-147.el8
rpm	kernel	4.18.0-193.1.2.el8_2
rpm	kernel	4.18.0-193.13.2.el8_2
rpm	kernel	4.18.0-193.14.3.el8_2
rpm	kernel	4.18.0-193.19.1.el8_2
rpm	kernel	4.18.0-193.28.1.el8_2
rpm	kernel	4.18.0-193.6.3.el8_2
rpm	kernel	4.18.0-193.el8
rpm	kernel	4.18.0-240.1.1.el8_3
rpm	kernel	4.18.0-240.10.1.el8_3
rpm	kernel	4.18.0-240.15.1.el8_3
rpm	kernel	4.18.0-240.22.1.el8_3
rpm	kernel	4.18.0-240.8.1.el8_3
rpm	kernel	4.18.0-240.el8
rpm	kernel	4.18.0-293.el8
rpm	kernel	4.18.0-305.10.2.el8_4
rpm	kernel	4.18.0-305.12.1.el8_4
rpm	kernel	4.18.0-305.17.1.el8_4
rpm	kernel	4.18.0-305.19.1.el8_4
rpm	kernel	4.18.0-305.25.1.el8_4
rpm	kernel	4.18.0-305.3.1.el8_4
rpm	kernel	4.18.0-305.7.1.el8_4
rpm	kernel	4.18.0-305.el8
rpm	kernel	4.18.0-348.12.2.el8_5
rpm	kernel	4.18.0-348.2.1.el8_5
rpm	kernel	4.18.0-348.20.1.el8_5
rpm	kernel	4.18.0-348.23.1.el8_5
rpm	kernel	4.18.0-348.7.1.el8_5
rpm	kernel	4.18.0-348.el8
rpm	kernel	4.18.0-372.13.1.0.1.el8_6
rpm	kernel	4.18.0-372.13.1.0.2.el8_6
rpm	kernel	4.18.0-372.16.1.0.1.el8_6
rpm	kernel	4.18.0-372.16.1.0.2.el8_6
rpm	kernel	4.18.0-372.19.1.0.1.el8_6
rpm	kernel	4.18.0-372.19.1.0.2.el8_6
rpm	kernel	4.18.0-372.26.1.0.1.el8_6
rpm	kernel	4.18.0-372.26.1.0.2.el8_6
rpm	kernel	4.18.0-372.32.1.0.1.el8_6
rpm	kernel	4.18.0-372.32.1.0.2.el8_6
rpm	kernel	4.18.0-372.9.1.0.2.el8
rpm	kernel	4.18.0-372.9.1.el8
rpm	kernel	4.18.0-425.10.1.0.1.el8_7
rpm	kernel	4.18.0-425.10.1.el8_7
rpm	kernel	4.18.0-425.13.1.0.1.el8_7
rpm	kernel	4.18.0-425.13.1.el8_7

Ecosystem	Package	Version

Vulnerabilities

CVE-2025-40123

Published Nov 14, 2025

https://lore.kernel.org/linux-cve-announce/2025111253-CVE-2025-40123-fcb1@gregkh/


rpm	kernel	4.18.0-147.0.2.el8_1
rpm	kernel	4.18.0-147.0.3.el8_1
rpm	kernel	4.18.0-147.3.1.el8_1
rpm	kernel	4.18.0-147.5.1.el8_1
rpm	kernel	4.18.0-147.8.1.el8_1
rpm	kernel	4.18.0-147.el8
rpm	kernel	4.18.0-193.1.2.el8_2
rpm	kernel	4.18.0-193.13.2.el8_2
rpm	kernel	4.18.0-193.14.3.el8_2
rpm	kernel	4.18.0-193.19.1.el8_2
rpm	kernel	4.18.0-193.28.1.el8_2
rpm	kernel	4.18.0-193.6.3.el8_2
rpm	kernel	4.18.0-193.el8
rpm	kernel	4.18.0-240.1.1.el8_3
rpm	kernel	4.18.0-240.10.1.el8_3
rpm	kernel	4.18.0-240.15.1.el8_3
rpm	kernel	4.18.0-240.22.1.el8_3
rpm	kernel	4.18.0-240.8.1.el8_3
rpm	kernel	4.18.0-240.el8
rpm	kernel	4.18.0-293.el8
rpm	kernel	4.18.0-305.10.2.el8_4
rpm	kernel	4.18.0-305.12.1.el8_4
rpm	kernel	4.18.0-305.17.1.el8_4
rpm	kernel	4.18.0-305.19.1.el8_4
rpm	kernel	4.18.0-305.25.1.el8_4
rpm	kernel	4.18.0-305.3.1.el8_4
rpm	kernel	4.18.0-305.7.1.el8_4
rpm	kernel	4.18.0-305.el8
rpm	kernel	4.18.0-348.12.2.el8_5
rpm	kernel	4.18.0-348.2.1.el8_5
rpm	kernel	4.18.0-348.20.1.el8_5
rpm	kernel	4.18.0-348.23.1.el8_5
rpm	kernel	4.18.0-348.7.1.el8_5
rpm	kernel	4.18.0-348.el8
rpm	kernel	4.18.0-372.13.1.0.1.el8_6
rpm	kernel	4.18.0-372.13.1.0.2.el8_6
rpm	kernel	4.18.0-372.16.1.0.1.el8_6
rpm	kernel	4.18.0-372.16.1.0.2.el8_6
rpm	kernel	4.18.0-372.19.1.0.1.el8_6
rpm	kernel	4.18.0-372.19.1.0.2.el8_6
rpm	kernel	4.18.0-372.26.1.0.1.el8_6
rpm	kernel	4.18.0-372.26.1.0.2.el8_6
rpm	kernel	4.18.0-372.32.1.0.1.el8_6
rpm	kernel	4.18.0-372.32.1.0.2.el8_6
rpm	kernel	4.18.0-372.9.1.0.2.el8
rpm	kernel	4.18.0-372.9.1.el8
rpm	kernel	4.18.0-425.10.1.0.1.el8_7
rpm	kernel	4.18.0-425.10.1.el8_7
rpm	kernel	4.18.0-425.13.1.0.1.el8_7
rpm	kernel	4.18.0-425.13.1.el8_7

CVE-2025-40123 | Components Impacted | Sonatype Guide | Sonatype Guide

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CVE-2025-40123