CVE-2026-22994

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix reference count leak in bpf_prog_test_run_xdp() syzbot is reporting unregister_netdevice: waiting for sit0 to become free. Usage count = 2 problem. A debug printk() patch found that a refcount is obtained at xdp_convert_md_to_buff() from bpf_prog_test_run_xdp(). According to commit ec94670fcb3b ("bpf: Support specifying ingress via xdp_md context in BPF_PROG_TEST_RUN"), the refcount obtained by xdp_convert_md_to_buff() will be released by xdp_convert_buff_to_md(). Therefore, we can consider that the error handling path introduced by commit 1c1949982524 ("bpf: introduce frags support to bpf_prog_test_run_xdp()") forgot to call xdp_convert_buff_to_md().

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/368569bc546d3368ee9980ba79fc42fdff9a3365	Patch
https://git.kernel.org/stable/c/737be05a765761d7d7c9f7fe92274bd8e6f6951e	Patch
https://git.kernel.org/stable/c/98676ee71fd4eafeb8be63c7f3f1905d40e03101	Patch
https://git.kernel.org/stable/c/ec69daabe45256f98ac86c651b8ad1b2574489a7	Patch
https://git.kernel.org/stable/c/fb9ef40cccdbacce36029b305d0ef1e12e4fea38	Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.19:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.19:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.19:rc3::::::
	cpe:2.3:o:linux:linux_kernel:6.19:rc4::::::
	cpe:2.3:o:linux:linux_kernel:6.19:rc5::::::

History

No history.

Information

Published : 2026-01-23 16:15

Updated : 2026-07-14 13:18

NVD link : CVE-2026-22994

Mitre link : CVE-2026-22994

CVE.ORG link : CVE-2026-22994

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-Other

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Usage count = 2\n\nproblem. A debug printk() patch found that a refcount is obtained at\nxdp_convert_md_to_buff() from bpf_prog_test_run_xdp().\n\nAccording to commit ec94670fcb3b (\"bpf: Support specifying ingress via\nxdp_md context in BPF_PROG_TEST_RUN\"), the refcount obtained by\nxdp_convert_md_to_buff() will be released by xdp_convert_buff_to_md().\n\nTherefore, we can consider that the error handling path introduced by\ncommit 1c1949982524 (\"bpf: introduce frags support to\nbpf_prog_test_run_xdp()\") forgot to call xdp_convert_buff_to_md()."}, {"lang": "es", "value": "Se ha resuelto la siguiente vulnerabilidad en el kernel de Linux:\n\nbpf: Corregir fuga de contador de referencias en bpf_prog_test_run_xdp()\n\nsyzbot est\u00e1 reportando\n\nunregister_netdevice: esperando que sit0 quede libre. Recuento de uso = 2\n\nproblema. Un parche de depuraci\u00f3n printk() encontr\u00f3 que se obtiene un contador de referencias en xdp_convert_md_to_buff() desde bpf_prog_test_run_xdp().\n\nSeg\u00fan el commit ec94670fcb3b ('bpf: Soporte para especificar el ingreso a trav\u00e9s del contexto xdp_md en BPF_PROG_TEST_RUN'), el contador de referencias obtenido por xdp_convert_md_to_buff() ser\u00e1 liberado por xdp_convert_buff_to_md().\n\nPor lo tanto, podemos considerar que la ruta de manejo de errores introducida por el commit 1c1949982524 ('bpf: introducir soporte de fragmentos en bpf_prog_test_run_xdp()') olvid\u00f3 llamar a xdp_convert_buff_to_md()."}], "lastModified": "2026-07-14T13:18:21.837", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D8396A00-9DF6-4F41-B27A-476CA41851D0", "versionEndExcluding": "6.1.161", "versionStartIncluding": "5.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BB7A164B-7422-4A1C-82FB-5FCAEE53C06C", "versionEndExcluding": "6.6.121", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F72B884C-B44F-40E4-9895-CE421AC663D0", "versionEndExcluding": "6.12.66", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "879529BC-5B4C-4EBE-BF1D-1A31404A8B2E", "versionEndExcluding": "6.18.6", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}