Description
The Linux kernel before 2.6.25.10 does not properly perform tty operations, which allows local users to cause a denial of service (system crash) or possibly gain privileges via vectors involving NULL pointer dereference of function pointers in (1) hamradio/6pack.c, (2) hamradio/mkiss.c, (3) irda/irtty-sir.c, (4) ppp_async.c, (5) ppp_synctty.c, (6) slip.c, (7) wan/x25_asy.c, and (8) wireless/strip.c in drivers/net/.
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 4.0 | fai-kernels | 1.17+etch.22etch2 | DSA-1630-1 |
| Debian 4.0 | linux-2.6 | 2.6.18.dfsg.1-22etch2 | DSA-1630-1 |
| Debian 4.0 | user-mode-linux | 2.6.18-1um-2etch.22etch2 | DSA-1630-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | kernel +12 | 2.6.18-92.1.10.el5 | RHSA-2008:0612 |
| RHEL 4 | kernel +10 | 2.6.9-78.EL | RHSA-2008:0665 |
| RHEL 3 | kernel +8 | 2.4.21-58.EL | RHSA-2008:0973 |
Advisories 4
- RHSA-2008:0612 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2008:0973 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2008:0665 Red Hat Security Advisory: Updated kernel packages for Red Hat Enterprise Linux 4.7 Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1630-1 fai-kernels linux-2.6 user-mode-linux - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- SUSE-SA:2008:047 vendor-advisory
- DSA-1630 vendor-advisory
- ADV-2008-2063 vdb-entry
- http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.25.y.git%3Ba=commitdiff%3Bh=2a739dd53ad7ee010ae6e155438507f329dce788
- SUSE-SA:2008:038 vendor-advisory
- USN-637-1 vendor-advisory
- SUSE-SA:2008:035 vendor-advisory
- [oss-security] 20080703 2.6.25.10 security fixes, please assign CVE id mailing-list
- 31614 third-party-advisory
- 31685 third-party-advisory
- 31341 third-party-advisory
- SUSE-SA:2008:052 vendor-advisory
- 30982 third-party-advisory
- oval:org.mitre.oval:def:11632 vdb-entry signature
- 31551 third-party-advisory
- RHSA-2008:0665 vendor-advisory
- 32103 third-party-advisory
- 31048 third-party-advisory
- 30076 vdb-entry
- 32759 third-party-advisory
- kernel-tty-dos(43687) vdb-entry
- SUSE-SA:2008:037 vendor-advisory
- 32370 third-party-advisory
- RHSA-2008:0973 vendor-advisory
- RHSA-2008:0612 vendor-advisory
- 31202 third-party-advisory
- oval:org.mitre.oval:def:6633 vdb-entry signature
- http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25.10
- http://support.avaya.com/elmodocs2/security/ASA-2008-365.htm
- SUSE-SA:2008:049 vendor-advisory
- SUSE-SR:2008:025 vendor-advisory
- 33201 third-party-advisory
- 31229 third-party-advisory