Description
The audit_syscall_entry function in the Linux kernel 2.6.28.7 and earlier on the x86_64 platform does not properly handle (1) a 32-bit process making a 64-bit syscall or (2) a 64-bit process making a 32-bit syscall, which allows local users to bypass certain syscall audit configurations via crafted syscalls, a related issue to CVE-2009-0342 and CVE-2009-0343.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 5.0 | linux-2.6 | 2.6.26-15lenny2 | DSA-1800-1 |
| Debian 5.0 | user-mode-linux | 2.6.26-1um-2+15lenny2 | DSA-1800-1 |
| Debian 4.0 | fai-kernels | 1.17+etch.24etch2 | DSA-1794-1 |
| Debian 4.0 | linux-2.6 | 2.6.18.dfsg.1-24etch2 | DSA-1794-1 |
| Debian 4.0 | linux-2.6.24 | 2.6.24-6~etchnhalf.8etch1 | DSA-1787-1 |
| Debian 4.0 | user-mode-linux | 2.6.18-1um-2etch.24etch2 | DSA-1794-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | kernel +12 | 2.6.18-128.1.10.el5 | RHSA-2009:0473 |
| RHEL 4 | kernel +10 | 2.6.9-78.0.22.EL | RHSA-2009:0459 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5.2 EUS | kernel +11 | 2.6.18-92.1.35.el5 | RHSA-2010:0079 |
| Red Hat MRG 1 | kernel-rt +9 | 2.6.24.7-111.el5rt | RHSA-2009:0451 |
Advisories 7
- RHSA-2010:0079 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2009:0473 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2009:0459 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1787-1 linux-2.6.24 - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1794-1 linux-2.6 - multiple vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1800-1 linux-2.6 user-mode-linux - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2009:0451 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- 35390 third-party-advisory
- 1022153 vdb-entry
- 34962 third-party-advisory
- MDVSA-2009:118 vendor-advisory
- SUSE-SA:2009:028 vendor-advisory
- 37471 third-party-advisory
- RHSA-2009:0459 vendor-advisory
- http://scary.beasts.org/security/CESA-2009-001.html
- linux-kernel-auditsyscallentry-sec-bypass(49061) vdb-entry
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- [oss-security] 20090302 CVE request: kernel: x86-64: syscall-audit: 32/64 syscall hole mailing-list
- DSA-1794 vendor-advisory
- 20090516 rPSA-2009-0084-1 kernel mailing-list
- SUSE-SA:2009:030 vendor-advisory
- USN-751-1 vendor-advisory
- 35185 third-party-advisory
- 35015 third-party-advisory
- oval:org.mitre.oval:def:8508 vdb-entry signature
- 35011 third-party-advisory
- 20091120 VMSA-2009-0016 VMware vCenter and ESX update release and vMA patch release address multiple security issue in third party components mailing-list
- 35120 third-party-advisory
- SUSE-SA:2009:031 vendor-advisory
- 34084 third-party-advisory
- 34981 third-party-advisory
- DSA-1800 vendor-advisory
- oval:org.mitre.oval:def:9600 vdb-entry signature
- 34917 third-party-advisory
- DSA-1787 vendor-advisory
- [linux-kernel] 20090228 [PATCH 0/2] x86-64: 32/64 syscall arch holes mailing-list
- https://bugzilla.redhat.com/show_bug.cgi?id=487990
- RHSA-2009:0473 vendor-advisory
- http://wiki.rpath.com/Advisories:rPSA-2009-0084
- RHSA-2009:0451 vendor-advisory
- [linux-kernel] 20090228 [PATCH 1/2] x86-64: syscall-audit: fix 32/64 syscall hole mailing-list
- 35121 third-party-advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ccbe495caa5e604b04d5a31d7459a6f6a76a756c
- ADV-2009-3316 vdb-entry
- 33951 vdb-entry
- 35394 third-party-advisory