CVE Feed

    Dashboard / CVE / CVE-2007-4990

    CVE-2007-4990

    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.

    Published:Oct 2, 2007
    Last Modified:Apr 23, 2026
    EPS:Oct 5, 2007
    EPSS Score:0.05229
    CVSS Score:7.5

    Affected Products

    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    X.org
    Product
    X Font Server

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-122 Heap-based Buffer Overflow

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2026-88914 (CVSS 4.4) — A flaw was found in GStreamer's gst-plugins-good isomp4 plugin. When processing a specially crafted MP4 or MOV…
    CVE-2026-84828 (CVSS 6.5) — A flaw was found in PCS (Pacemaker Configuration System). A local attacker with membership in the 'haclient' g…
    CVE-2026-88859 (CVSS 6.3) — A flaw was found in Evolution. A remote attacker can exploit this vulnerability by sending a specially crafted…
    CVE-2026-18147 (CVSS 8.1) — A flaw was found in FreeIPA. An unauthenticated remote attacker could exploit a DOM Cross-Site Scripting (XSS)…
    CVE-2026-87853 (CVSS 7.5) — A flaw was found in SSSD's IdP authentication provider. The eval_access_token_buf() function compares the OIDC…
    CVE-2026-88924 (CVSS 7) — A flaw was found in the admin backend of gvfs. The privileged gvfsd-admin daemon changes the ownership of newl…
    CVE-2026-87876 (CVSS 3) — Two case-insensitive comparisons on request-derived usernames outside the main authorization path in CUPS's sc…
    CVE-2026-87875 (CVSS 4.3) — The cupsUTF32ToUTF8() function in CUPS's cups/transcode.c lacks a source-length bound and can read past the en…
    CVE-2026-87766 (CVSS 8.8) — A flaw was found in bubblewrap. During sandbox setup, creating files or directories under the new root can fol…
    CVE-2026-18090 (CVSS 6.1) — A flaw was found in gdk-pixbuf. This vulnerability allows a remote attacker to cause a heap out-of-bounds read…

    References

    http://bugs.freedesktop.org/show_bug.cgi?id=12299
    http://bugs.gentoo.org/show_bug.cgi?id=194606
    http://docs.info.apple.com/article.html?artnum=307562
    http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01323725
    http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=602
    http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html
    http://lists.freedesktop.org/archives/xorg-announce/2007-October/000416.html
    http://secunia.com/advisories/27040
    http://secunia.com/advisories/27052
    http://secunia.com/advisories/27060
    http://secunia.com/advisories/27176
    http://secunia.com/advisories/27228
    http://secunia.com/advisories/27240
    http://secunia.com/advisories/27560
    http://secunia.com/advisories/28004
    http://secunia.com/advisories/28514
    http://secunia.com/advisories/28536
    http://secunia.com/advisories/28542
    http://secunia.com/advisories/29420
    http://security.gentoo.org/glsa/glsa-200710-11.xml
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-103114-1
    http://sunsolve.sun.com/search/document.do?assetkey=1-66-200642-1
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:210
    http://www.novell.com/linux/security/advisories/2007_54_xorg.html
    http://www.redhat.com/support/errata/RHSA-2008-0029.html
    http://www.redhat.com/support/errata/RHSA-2008-0030.html
    http://www.securityfocus.com/archive/1/481432/100/0/threaded
    http://www.securityfocus.com/bid/25898
    http://www.securitytracker.com/id?1018763
    http://www.vupen.com/english/advisories/2007/3337
    http://www.vupen.com/english/advisories/2007/3338
    http://www.vupen.com/english/advisories/2007/3467
    http://www.vupen.com/english/advisories/2008/0149
    http://www.vupen.com/english/advisories/2008/0924/references
    https://exchange.xforce.ibmcloud.com/vulnerabilities/36920
    https://issues.rpath.com/browse/RPL-1756
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11599
    https://www.redhat.com/archives/fedora-package-announce/2007-December/msg00352.html
    http://bugs.freedesktop.org/show_bug.cgi?id=12299
    http://bugs.gentoo.org/show_bug.cgi?id=194606
    http://docs.info.apple.com/article.html?artnum=307562
    http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01323725
    http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=602
    http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html
    http://lists.freedesktop.org/archives/xorg-announce/2007-October/000416.html
    http://secunia.com/advisories/27040
    http://secunia.com/advisories/27052
    http://secunia.com/advisories/27060
    http://secunia.com/advisories/27176
    http://secunia.com/advisories/27228
    http://secunia.com/advisories/27240
    http://secunia.com/advisories/27560
    http://secunia.com/advisories/28004
    http://secunia.com/advisories/28514
    http://secunia.com/advisories/28536
    http://secunia.com/advisories/28542
    http://secunia.com/advisories/29420
    http://security.gentoo.org/glsa/glsa-200710-11.xml
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-103114-1
    http://sunsolve.sun.com/search/document.do?assetkey=1-66-200642-1
    http://www.mandriva.com/security/advisories?name=MDKSA-2007:210
    http://www.novell.com/linux/security/advisories/2007_54_xorg.html
    http://www.redhat.com/support/errata/RHSA-2008-0029.html
    http://www.redhat.com/support/errata/RHSA-2008-0030.html
    http://www.securityfocus.com/archive/1/481432/100/0/threaded
    http://www.securityfocus.com/bid/25898
    http://www.securitytracker.com/id?1018763
    http://www.vupen.com/english/advisories/2007/3337
    http://www.vupen.com/english/advisories/2007/3338
    http://www.vupen.com/english/advisories/2007/3467
    http://www.vupen.com/english/advisories/2008/0149
    http://www.vupen.com/english/advisories/2008/0924/references
    https://exchange.xforce.ibmcloud.com/vulnerabilities/36920
    https://issues.rpath.com/browse/RPL-1756
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11599
    https://www.redhat.com/archives/fedora-package-announce/2007-December/msg00352.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High