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    CVE-2019-11478

    Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit f070ef2ac66716357066b683fb0baf55f8191a2e.

    Published:Jun 17, 2019
    Last Modified:Nov 21, 2024
    EPS:Jun 18, 2019
    EPSS Score:0.24845
    CVSS Score:5.3

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    F5
    Product
    Big-ip Access Policy Manager
    Vendor
    F5
    Product
    Big-ip Advanced Firewall Manager
    Vendor
    F5
    Product
    Big-ip Analytics
    Vendor
    F5
    Product
    Big-ip Application Acceleration Manager
    Vendor
    F5
    Product
    Big-ip Application Security Manager
    Vendor
    F5
    Product
    Big-ip Domain Name System
    Vendor
    F5
    Product
    Big-ip Edge Gateway
    Vendor
    F5
    Product
    Big-ip Fraud Protection Service
    Vendor
    F5
    Product
    Big-ip Global Traffic Manager
    Vendor
    F5
    Product
    Big-ip Link Controller
    Vendor
    F5
    Product
    Big-ip Local Traffic Manager
    Vendor
    F5
    Product
    Big-ip Policy Enforcement Manager
    Vendor
    F5
    Product
    Big-ip Webaccelerator
    Vendor
    F5
    Product
    Traffix Signaling Delivery Controller
    Vendor
    Ivanti
    Product
    Connect Secure
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Pulsesecure
    Product
    Pulse Policy Secure
    Vendor
    Pulsesecure
    Product
    Pulse Secure Virtual Application Delivery Controller
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Atomic Host
    Vendor
    Redhat
    Product
    Enterprise Linux Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Eus
    Vendor
    Redhat
    Product
    Enterprise Mrg
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Extras Rt
    Vendor
    Redhat
    Product
    Rhel Tus

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
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    References

    http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html
    http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
    http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
    http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
    http://www.openwall.com/lists/oss-security/2019/06/28/2
    http://www.openwall.com/lists/oss-security/2019/07/06/3
    http://www.openwall.com/lists/oss-security/2019/07/06/4
    http://www.openwall.com/lists/oss-security/2019/10/24/1
    http://www.openwall.com/lists/oss-security/2019/10/29/3
    http://www.vmware.com/security/advisories/VMSA-2019-0010.html
    https://access.redhat.com/errata/RHSA-2019:1594
    https://access.redhat.com/errata/RHSA-2019:1602
    https://access.redhat.com/errata/RHSA-2019:1699
    https://access.redhat.com/security/vulnerabilities/tcpsack
    https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
    https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=f070ef2ac66716357066b683fb0baf55f8191a2e
    https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
    https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
    https://kc.mcafee.com/corporate/index?page=content&id=SB10287
    https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0007
    https://seclists.org/bugtraq/2019/Jul/30
    https://security.netapp.com/advisory/ntap-20190625-0001/
    https://support.f5.com/csp/article/K26618426
    https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic
    https://www.kb.cert.org/vuls/id/905115
    https://www.oracle.com/security-alerts/cpujan2020.html
    https://www.oracle.com/security-alerts/cpuoct2020.html
    https://www.synology.com/security/advisory/Synology_SA_19_28
    https://www.us-cert.gov/ics/advisories/icsa-19-253-03
    http://packetstormsecurity.com/files/153346/Kernel-Live-Patch-Security-Notice-LSN-0052-1.html
    http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
    http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
    http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
    http://www.openwall.com/lists/oss-security/2019/06/28/2
    http://www.openwall.com/lists/oss-security/2019/07/06/3
    http://www.openwall.com/lists/oss-security/2019/07/06/4
    http://www.openwall.com/lists/oss-security/2019/10/24/1
    http://www.openwall.com/lists/oss-security/2019/10/29/3
    http://www.vmware.com/security/advisories/VMSA-2019-0010.html
    https://access.redhat.com/errata/RHSA-2019:1594
    https://access.redhat.com/errata/RHSA-2019:1602
    https://access.redhat.com/errata/RHSA-2019:1699
    https://access.redhat.com/security/vulnerabilities/tcpsack
    https://cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
    https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=f070ef2ac66716357066b683fb0baf55f8191a2e
    https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
    https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
    https://kc.mcafee.com/corporate/index?page=content&id=SB10287
    https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0007
    https://seclists.org/bugtraq/2019/Jul/30
    https://security.netapp.com/advisory/ntap-20190625-0001/
    https://support.f5.com/csp/article/K26618426
    https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic
    https://www.kb.cert.org/vuls/id/905115
    https://www.oracle.com/security-alerts/cpujan2020.html
    https://www.oracle.com/security-alerts/cpuoct2020.html
    https://www.synology.com/security/advisory/Synology_SA_19_28
    https://www.us-cert.gov/ics/advisories/icsa-19-253-03

    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