Description
The dma_rx function in drivers/net/wireless/b43/dma.c in the Linux kernel before 2.6.39 does not properly allocate receive buffers, which allows remote attackers to cause a denial of service (system crash) via a crafted frame.
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | perf +14 | 2.6.32-131.21.1.el6 | RHSA-2011:1465 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat MRG 2 | kernel-rt +10 | 2.6.33.9-rt31.79.el6rt | RHSA-2012:0010 |
Advisories 2
- RHSA-2012:0010 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2011:1465 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- [oss-security] 20110914 Re: CVE request -- kernel: b43: allocate receive buffers big enough for max frame len + offset mailing-list
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=c85ce65ecac078ab1a1835c87c4a6319cf74660a
- http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- https://bugzilla.redhat.com/show_bug.cgi?id=738202
- https://github.com/torvalds/linux/commit/c85ce65ecac078ab1a1835c87c4a6319cf74660a