CVE-2026-22994bpf: Fix reference count leak in bpf_prog_test_run_xdp()
- 5.5MediumCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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().
Timeline
ID reserved
By Linux
- 10 days later
· 10 days later
Published
- 10 months later
· 10 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 1c194998252469cad00a08bd9ef0b99fd255c260 – < 368569bc546d3368ee9980ba79fc42fdff9a3365
- affected 1c194998252469cad00a08bd9ef0b99fd255c260 – < 98676ee71fd4eafeb8be63c7f3f1905d40e03101
- affected 1c194998252469cad00a08bd9ef0b99fd255c260 – < fb9ef40cccdbacce36029b305d0ef1e12e4fea38
- affected 1c194998252469cad00a08bd9ef0b99fd255c260 – < 737be05a765761d7d7c9f7fe92274bd8e6f6951e
- affected 1c194998252469cad00a08bd9ef0b99fd255c260 – < ec69daabe45256f98ac86c651b8ad1b2574489a7
- affected 5.18
- unaffected < 5.18
- unaffected 6.1.161 – ≤ 6.1.*
- unaffected 6.6.121 – ≤ 6.6.*
- unaffected 6.12.66 – ≤ 6.12.*
- unaffected 6.18.6 – ≤ 6.18.*
- unaffected 6.19 – ≤ *
References
References7
- https://git.kernel.org/stable/c/368569bc546d3368ee9980ba79fc42fdff9a3365 (opens in a new tab)
- https://git.kernel.org/stable/c/98676ee71fd4eafeb8be63c7f3f1905d40e03101 (opens in a new tab)
- https://git.kernel.org/stable/c/fb9ef40cccdbacce36029b305d0ef1e12e4fea38 (opens in a new tab)
- https://git.kernel.org/stable/c/737be05a765761d7d7c9f7fe92274bd8e6f6951e (opens in a new tab)
- https://git.kernel.org/stable/c/ec69daabe45256f98ac86c651b8ad1b2574489a7 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-4293 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-22994)Record last updated .