xfs heap overflow in the swap_char2b function
Published Oct 5, 2007
7.5
HIGHCVSS 2.0
EPSS 10.74%
Description
The swap_char2b function in X.Org X Font Server (xfs) before 1.0.5 allows context-dependent attackers to execute arbitrary code via (1) QueryXBitmaps and (2) QueryXExtents protocol requests with crafted size values that specify an arbitrary number of bytes to be swapped on the heap, which triggers heap corruption.
Affected products
No data.
- ≤ 1.0.4
No data.
Red Hat Enterprise Linux 2.1
XFree86-0:4.1.0-86.EL
Fixed · RHSA-2008:0029
Red Hat Enterprise Linux 3
XFree86-0:4.3.0-126.EL
Fixed · RHSA-2008:0029
Red Hat Enterprise Linux 4
xorg-x11-0:6.8.2-1.EL.33.0.2
Fixed · RHSA-2008:0030
Red Hat Enterprise Linux 5
xorg-x11-xfs
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 2.1 | XFree86-0:4.1.0-86.EL | Fixed | RHSA-2008:0029 |
| Red Hat Enterprise Linux 3 | XFree86-0:4.3.0-126.EL | Fixed | RHSA-2008:0029 |
| Red Hat Enterprise Linux 4 | xorg-x11-0:6.8.2-1.EL.33.0.2 | Fixed | RHSA-2008:0030 |
| Red Hat Enterprise Linux 5 | xorg-x11-xfs | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 10.74% (0.10737) | 95.70th | v5 (v2026.06.15) |
| Jun 15, 2026 | 10.74% (0.10737) | 95.24th | v5 (v2026.06.15) |
| Apr 12, 2026 | 5.23% (0.05229) | 89.96th | v4 (v2025.03.14) |
| Jul 13, 2025 | 4.01% (0.04015) | 87.96th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.54% (0.01537) | 80.06th | v4 (v2025.03.14) |
| Dec 12, 2024 | 3.48% (0.03484) | 91.88th | v3 (v2023.03.01) |
| Jul 1, 2024 | 3.37% (0.03374) | 91.47th | v3 (v2023.03.01) |
| May 24, 2024 | 3.32% (0.03316) | 91.32th | v3 (v2023.03.01) |
| Mar 8, 2024 | 3.19% (0.03189) | 90.91th | v3 (v2023.03.01) |
| Oct 11, 2023 | 3.07% (0.03068) | 89.85th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.24% (0.02242) | 87.77th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.42% (0.04421) | 88.21th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.42% (0.04421) | 87.03th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.42% (0.04421) | 70.83th | v2 (v2022.01.01) |
References (42)
- http://bugs.freedesktop.org/show_bug.cgi?id=12299 x_refsource_CONFIRM
- http://bugs.gentoo.org/show_bug.cgi?id=194606 x_refsource_CONFIRM
- http://docs.info.apple.com/article.html?artnum=307562 x_refsource_CONFIRM
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01323725 vendor-advisoryx_refsource_HP
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- http://secunia.com/advisories/27040 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/27052 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/27060 third-party-advisoryx_refsource_SECUNIA
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- http://secunia.com/advisories/29420 third-party-advisoryx_refsource_SECUNIA
- http://security.gentoo.org/glsa/glsa-200710-11.xml vendor-advisoryx_refsource_GENTOO
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-103114-1 vendor-advisoryx_refsource_SUNALERT
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- http://www.mandriva.com/security/advisories?name=MDKSA-2007:210 vendor-advisoryx_refsource_MANDRIVA
- http://www.novell.com/linux/security/advisories/2007_54_xorg.html vendor-advisoryx_refsource_SUSE
- http://www.redhat.com/support/errata/RHSA-2008-0029.html vendor-advisoryx_refsource_REDHAT
- http://www.redhat.com/support/errata/RHSA-2008-0030.html vendor-advisoryx_refsource_REDHAT
- http://www.securityfocus.com/archive/1/481432/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/25898 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1018763 vdb-entryx_refsource_SECTRACK
- http://www.vupen.com/english/advisories/2007/3337 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2007/3338 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2007/3467 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2008/0149 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2008/0924/references vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2007-4990 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=322961 Issue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/36920 vdb-entryx_refsource_XF
- https://issues.rpath.com/browse/RPL-1756 x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2007-4990
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11599 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2007-4990
- https://www.redhat.com/archives/fedora-package-announce/2007-December/msg00352.html vendor-advisoryx_refsource_FEDORA
Change history (0)
No recorded changes yet.