bpf: don't rewrite bpf_fastcall patterns entered by a jump
In the Linux kernel, the following vulnerability has been resolved: bpf: don't rewrite bpf_fastcall patterns entered by a jump mark_fastcall_pattern_for_call() must ensure that matched "spill; call; fill" instruction series is not interrupted by a jump. Otherwise the rewrite applied by bpf_remove_fastcall_spills_fills() is not sound. Record the instructions targeted by jumps in insn_aux_data[*].jump_target when the CFG is built and use this flag to stop growing a pattern at such an instruction. Jumps to the first spill are fine. Note that existing insn_aux_data[*].jmp_point field can't be reused, as it marks subprogram return instructions.
CVE-2026-98048
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-2026-98048
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": "5b5f51bff1b66cedb62b5ba74a1878341204e057",
"lessThan": "a0cd1c3ac63504ba3c50c01a00c11812919b619f",
"versionType": "git"
},
{
"status": "affected",
"version": "5b5f51bff1b66cedb62b5ba74a1878341204e057",
"lessThan": "c4d3bdb3ab211dcfad734b02e06fcb12adb4757f",
"versionType": "git"
},
{
"status": "affected",
"version": "5b5f51bff1b66cedb62b5ba74a1878341204e057",
"lessThan": "24adbc2c3bbe3385ce922587e1f8e837a68b3e25",
"versionType": "git"
},
{
"status": "affected",
"version": "5b5f51bff1b66cedb62b5ba74a1878341204e057",
"lessThan": "0b1c83dc3c4401cd7e846548f62e3caf3d06742e",
"versionType": "git"
}
],
"programFiles": [
"include/linux/bpf_verifier.h",
"kernel/bpf/cfg.c",
"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": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"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": [
"include/linux/bpf_verifier.h",
"kernel/bpf/cfg.c",
"kernel/bpf/verifier.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98048
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48838 · Revision 1
- Added to Heist Feed
- Publisher date