bpf: Skip unsettled links in link iterator
In the Linux kernel, the following vulnerability has been resolved: bpf: Skip unsettled links in link iterator bpf_link_prime() inserts a link into link_idr before anon_inode_getfile() succeeds and before bpf_link_settle() publishes the ID in link->id. bpf_link_by_id() treats such an ID-zero link as unsettled, but the link iterator takes a reference without this check. If anon_inode_getfile() then fails, the creator removes the ID and frees its still-private link directly. The iterator is left with a dangling reference and its next bpf_link_put() accesses freed memory. Treat ID-zero entries as transient in bpf_link_get_curr_or_next(), just as bpf_link_by_id() does. BUG: KASAN: slab-use-after-free in bpf_link_put Write of size 8 by task exp/384 Call Trace: bpf_link_put kernel/bpf/syscall.c:3372 bpf_link_seq_next kernel/bpf/link_iter.c:33 bpf_seq_read kernel/bpf/bpf_iter.c:158 vfs_read fs/read_write.c:572 ksys_read fs/read_write.c:716 do_syscall_64 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe arch/x86/entry/entry_64.S:121 Kernel panic - not syncing: KASAN: panic_on_warn set ...
CVE-2026-98378
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-2026-98378
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": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "68930f8d40ab4c10ca3b019f076136758fd100a8",
"versionType": "git"
},
{
"status": "affected",
"version": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "c251ed48bd9063cf7de6049421e78b6de989060f",
"versionType": "git"
},
{
"status": "affected",
"version": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "798a61edbc436cacdb659927d067368eeb1e30e2",
"versionType": "git"
},
{
"status": "affected",
"version": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "6e271f093d15d323f42de26f66556af53fa8e19f",
"versionType": "git"
},
{
"status": "affected",
"version": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "87ce4b53b7436b50fc984f0a6afaf77f68ac5573",
"versionType": "git"
},
{
"status": "affected",
"version": "9f88361273082825d9f0d13a543d49f9fa0d44a8",
"lessThan": "50e80e2bb5e2be8515205b9c496b9640ddefa434",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/syscall.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/syscall.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98378
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #55584 · Revision 1
- Added to Heist Feed
- Publisher date