bpf: Don't predict JMP32 pointer vs zero comparisons
In the Linux kernel, the following vulnerability has been resolved: bpf: Don't predict JMP32 pointer vs zero comparisons Consider the following program: r1 = map_value; /* low 32 bits are zero at runtime */ r6 = 0xdead000000000000; if w1 != 0 goto l1; l0: r1 += r6; r2 = *(u64 *)(r1 + 0); exit; l1: r6 = 0; goto l0; At the moment is_branch_taken() reports the jump as always taken, because it does not distinguish between BPF_JMP and BPF_JMP32 comparisons when processing 'if w1 != 0 ...'.
CVE-2026-98041
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-2026-98041
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": "cac616db39c207dc63465a4e05c6ce0e60b2cce4",
"lessThan": "6e1544986536734166176c3add504add23bcbd15",
"versionType": "git"
},
{
"status": "affected",
"version": "cac616db39c207dc63465a4e05c6ce0e60b2cce4",
"lessThan": "d16f0eafcaa62e677a2b5b0dabc1f8d31dfe3d4d",
"versionType": "git"
},
{
"status": "affected",
"version": "cac616db39c207dc63465a4e05c6ce0e60b2cce4",
"lessThan": "e2ae33247e8b2dbe9d116d3e61cadf6d548339c6",
"versionType": "git"
},
{
"status": "affected",
"version": "cac616db39c207dc63465a4e05c6ce0e60b2cce4",
"lessThan": "a4d7f94c1ca914469ced665ec2f98be669aef462",
"versionType": "git"
},
{
"status": "affected",
"version": "cac616db39c207dc63465a4e05c6ce0e60b2cce4",
"lessThan": "e51179a4e09846f8fd0f26a05068520de2b301bf",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/verifier.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/verifier.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98041
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #48834 · Revision 1
- Added to Heist Feed
- Publisher date