Описание
An issue was discovered in fs/xfs/xfs_super.c in the Linux kernel before 4.18. A use after free exists, related to xfs_fs_fill_super failure.
A flaw was found in the Linux kernel's implementation of the XFS filesystem. A key data structure (sb->s_fs_info) may not be de-allocated when the system is under memory pressure. This same data structure is then used at a later time during filesystem operations. This could allow a local attacker who is able to groom memory to place an attacker-controlled data structure in this location and create a use-after-free situation which can result in memory corruption or privilege escalation.
Отчет
Red Hat Enterprise Linux 7.6.z had fixed this flaw mid release without it being recognised as a CVE. Prior releases of Red Hat Enterprise Linux EUS/AUS will still require the fix to be secure. Trackers have been made and fixes will be available as part of the standard release cycle.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | ||
| Red Hat Enterprise Linux 6 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | ||
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | ||
| Red Hat Enterprise Linux 8 | kernel | Not affected | ||
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | ||
| Red Hat Enterprise Linux 7.2 Advanced Update Support | kernel | Fixed | RHSA-2020:0661 | 03.03.2020 |
| Red Hat Enterprise Linux 7.3 Advanced Update Support | kernel | Fixed | RHSA-2020:0178 | 21.01.2020 |
| Red Hat Enterprise Linux 7.3 Telco Extended Update Support | kernel | Fixed | RHSA-2020:0178 | 21.01.2020 |
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Дополнительная информация
Статус:
EPSS
7.8 High
CVSS3
Связанные уязвимости
An issue was discovered in fs/xfs/xfs_super.c in the Linux kernel before 4.18. A use after free exists, related to xfs_fs_fill_super failure.
An issue was discovered in fs/xfs/xfs_super.c in the Linux kernel before 4.18. A use after free exists, related to xfs_fs_fill_super failure.
An issue was discovered in fs/xfs/xfs_super.c in the Linux kernel befo ...
An issue was discovered in fs/xfs/xfs_super.c in the Linux kernel before 4.18. A use after free exists, related to xfs_fs_fill_super failure.
Уязвимость компонента fs/xfs/xfs_super.c ядра операционной системы Linux, позволяющая нарушителю получить несанкционированный доступ к информации и нарушить ее целостность и доступность
EPSS
7.8 High
CVSS3