CVE-2026-22994bpf: Fix reference count leak in bpf_prog_test_run_xdp()
Updated under an hour ago ()
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It affects Linux and 4 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1c194998252469cad00a08bd9ef0b99fd255c260 before 368569bc546d3368ee9980ba79fc42fdff9a3365; from 1c194998252469cad00a08bd9ef0b99fd255c260 before 98676ee71fd4eafeb8be63c7f3f1905d40e03101; from 1c194998252469cad00a08bd9ef0b99fd255c260 before fb9ef40cccdbacce36029b305d0ef1e12e4fea38; from 1c194998252469cad00a08bd9ef0b99fd255c260 before 737be05a765761d7d7c9f7fe92274bd8e6f6951e; from 1c194998252469cad00a08bd9ef0b99fd255c260 before ec69daabe45256f98ac86c651b8ad1b2574489a7 | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.18 before 6.1.161; from 6.2 before 6.6.121; from 6.7 before 6.12.66; from 6.13 before 6.18.6; 6.19; 6.19; 6.19; 6.19; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/368569bc546d3368ee9980ba79fc42fdff9a3365patch
- https://git.kernel.org/stable/c/98676ee71fd4eafeb8be63c7f3f1905d40e03101patch
- https://git.kernel.org/stable/c/fb9ef40cccdbacce36029b305d0ef1e12e4fea38patch
- https://git.kernel.org/stable/c/737be05a765761d7d7c9f7fe92274bd8e6f6951epatch
- https://git.kernel.org/stable/c/ec69daabe45256f98ac86c651b8ad1b2574489a7patch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.