bpf: Fix reference count leak in bpf_prog_test_run_xdp()
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().
CVE-2026-22994
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-22994
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "1c194998252469cad00a08bd9ef0b99fd255c260",
"lessThan": "368569bc546d3368ee9980ba79fc42fdff9a3365",
"versionType": "git"
},
{
"status": "affected",
"version": "1c194998252469cad00a08bd9ef0b99fd255c260",
"lessThan": "98676ee71fd4eafeb8be63c7f3f1905d40e03101",
"versionType": "git"
},
{
"status": "affected",
"version": "1c194998252469cad00a08bd9ef0b99fd255c260",
"lessThan": "fb9ef40cccdbacce36029b305d0ef1e12e4fea38",
"versionType": "git"
},
{
"status": "affected",
"version": "1c194998252469cad00a08bd9ef0b99fd255c260",
"lessThan": "737be05a765761d7d7c9f7fe92274bd8e6f6951e",
"versionType": "git"
},
{
"status": "affected",
"version": "1c194998252469cad00a08bd9ef0b99fd255c260",
"lessThan": "ec69daabe45256f98ac86c651b8ad1b2574489a7",
"versionType": "git"
}
],
"programFiles": [
"net/bpf/test_run.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.161",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.121",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.66",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.6",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bpf/test_run.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-22994
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #27194 · Revision 1
- Added to Heist Feed
- Publisher date