CVE-2009-4895
Race condition in the tty_fasync function in drivers/char/tty_io.c in the Linux kernel before 2.6.32.6 allows local users to cause a…
- 4.7MediumCVSS base score
- 0.26%Exploitation in 30 daysEPSS · top 82% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Race condition in the tty_fasync function in drivers/char/tty_io.c in the Linux kernel before 2.6.32.6 allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via unknown vectors, related to the put_tty_queue and __f_setown functions. NOTE: the vulnerability was addressed in a different way in 2.6.32.9.
Timeline
ID reserved
By mitre
- 3 months later
· 3 months later
Published
- 14 years later
· 14 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.26% · top 82% of all CVEs (10 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.7.
Affected products
n/a
- affected n/a
References
10
- [oss-security] 20100615 Re: CVE Request - kernel: put_tty_queue NULL pointer deref (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- USN-1000-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://bugzilla.kernel.org/show_bug.cgi?id=14605 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.32.6 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [oss-security] 20100615 CVE Request - kernel: put_tty_queue NULL pointer deref (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [oss-security] 20100615 Re: CVE Request - kernel: put_tty_queue NULL pointer deref (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [oss-security] 20100615 Re: CVE Request - kernel: put_tty_queue NULL pointer deref (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=703625118069f9f8960d356676662d3db5a9d116 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=559100 (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-2094 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2009-4858 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2009-4895)Record last updated .