RHSA-2026:99119: Important: util-linux security update

Published Nov 11, 2026
·
Updated

The util-linux packages contain a large variety of low-level system utilities that are necessary for a Linux system to function. Among others, these include the fdisk configuration tool and the login program.Security Fix(es): util-linux: util-linux: heap use-after-free in libblkid nested partition probing (CVE-2026-13595) util-linux: TOCTOU in the mount program via ancestor directory swap on target path (CVE-2026-53613) util-linux: util-linux: Partition metadata compromise via integer overflow in DOS partition parser (CVE-2026-53615) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected Software

104 affected componentsFixes available
redhat/util-linux<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libblkid<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libblkid<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libblkid-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libblkid-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libblkid-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libblkid-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libfdisk<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libfdisk<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libfdisk-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libfdisk-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libmount<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libmount<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libmount-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libmount-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libmount-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libmount-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libsmartcols<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libsmartcols<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libsmartcols-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libsmartcols-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libuuid<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libuuid<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libuuid-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libuuid-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libuuid-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libuuid-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/python3-libmount<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/python3-libmount-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/python3-libmount-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-core<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-core-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-core-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-debugsource<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-debugsource<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-user<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-user-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-user-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/uuidd<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/uuidd-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/uuidd-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/python3-libmount<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-core<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-user<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/uuidd<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libblkid<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libblkid-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libblkid-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libfdisk<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libfdisk-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libmount<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libmount-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libmount-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libsmartcols<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libsmartcols-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libuuid<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libuuid-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libuuid-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/python3-libmount<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/python3-libmount-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-core<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-core-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-debugsource<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-user<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/util-linux-user-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/uuidd<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/uuidd-debuginfo<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libblkid<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libblkid-debuginfo<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libblkid-devel<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libfdisk<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libfdisk-debuginfo<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libmount<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libmount-debuginfo<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libmount-devel<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libsmartcols<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libsmartcols-debuginfo<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libuuid<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libuuid-debuginfo<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libuuid-devel<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/python3-libmount<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/python3-libmount-debuginfo<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/util-linux<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/util-linux-core<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/util-linux-core-debuginfo<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/util-linux-debuginfo<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/util-linux-debugsource<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/util-linux-user<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/util-linux-user-debuginfo<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/uuidd<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/uuidd-debuginfo<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libfdisk-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libfdisk-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libsmartcols-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libsmartcols-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libfdisk-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libsmartcols-devel<2.37.4-25.el9_8.2
2.37.4-25.el9_8.2
redhat/libfdisk-devel<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa
redhat/libsmartcols-devel<2.37.4-25.el9_8.2.aa
2.37.4-25.el9_8.2.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/util-linux to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  2. Upgrade

    Upgrade redhat/libblkid to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  3. Upgrade

    Upgrade redhat/libblkid-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  4. Upgrade

    Upgrade redhat/libblkid-devel to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  5. Upgrade

    Upgrade redhat/libfdisk to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  6. Upgrade

    Upgrade redhat/libfdisk-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  7. Upgrade

    Upgrade redhat/libmount to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  8. Upgrade

    Upgrade redhat/libmount-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  9. Upgrade

    Upgrade redhat/libmount-devel to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  10. Upgrade

    Upgrade redhat/libsmartcols to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  11. Upgrade

    Upgrade redhat/libsmartcols-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  12. Upgrade

    Upgrade redhat/libuuid to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  13. Upgrade

    Upgrade redhat/libuuid-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  14. Upgrade

    Upgrade redhat/libuuid-devel to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  15. Upgrade

    Upgrade redhat/python3-libmount to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  16. Upgrade

    Upgrade redhat/python3-libmount-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  17. Upgrade

    Upgrade redhat/util-linux-core to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  18. Upgrade

    Upgrade redhat/util-linux-core-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  19. Upgrade

    Upgrade redhat/util-linux-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  20. Upgrade

    Upgrade redhat/util-linux-debugsource to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  21. Upgrade

    Upgrade redhat/util-linux-user to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  22. Upgrade

    Upgrade redhat/util-linux-user-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  23. Upgrade

    Upgrade redhat/uuidd to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  24. Upgrade

    Upgrade redhat/uuidd-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  25. Upgrade

    Upgrade redhat/libblkid to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  26. Upgrade

    Upgrade redhat/libblkid-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  27. Upgrade

    Upgrade redhat/libblkid-devel to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  28. Upgrade

    Upgrade redhat/libfdisk to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  29. Upgrade

    Upgrade redhat/libfdisk-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  30. Upgrade

    Upgrade redhat/libmount to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  31. Upgrade

    Upgrade redhat/libmount-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  32. Upgrade

    Upgrade redhat/libmount-devel to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  33. Upgrade

    Upgrade redhat/libsmartcols to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  34. Upgrade

    Upgrade redhat/libsmartcols-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  35. Upgrade

    Upgrade redhat/libuuid to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  36. Upgrade

    Upgrade redhat/libuuid-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  37. Upgrade

    Upgrade redhat/libuuid-devel to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  38. Upgrade

    Upgrade redhat/python3-libmount to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  39. Upgrade

    Upgrade redhat/python3-libmount-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  40. Upgrade

    Upgrade redhat/util-linux to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  41. Upgrade

    Upgrade redhat/util-linux-core to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  42. Upgrade

    Upgrade redhat/util-linux-core-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  43. Upgrade

    Upgrade redhat/util-linux-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  44. Upgrade

    Upgrade redhat/util-linux-debugsource to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  45. Upgrade

    Upgrade redhat/util-linux-user to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  46. Upgrade

    Upgrade redhat/util-linux-user-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  47. Upgrade

    Upgrade redhat/uuidd to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  48. Upgrade

    Upgrade redhat/uuidd-debuginfo to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  49. Upgrade

    Upgrade redhat/libfdisk-devel to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  50. Upgrade

    Upgrade redhat/libsmartcols-devel to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2
  51. Upgrade

    Upgrade redhat/libfdisk-devel to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa
  52. Upgrade

    Upgrade redhat/libsmartcols-devel to a version that resolves this vulnerability.

    Fixed in 2.37.4-25.el9_8.2.aa

Event History

Nov 11, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

Frequently Asked Questions

1

Which components should be prioritized when assessing exposure?

Assess systems using util-linux and its libblkid, libfdisk, or libmount components. The listed issues affect nested partition probing in libblkid, DOS partition parsing, and the mount program's handling of target paths.

2

What attacker-controlled conditions are relevant to these flaws?

The libblkid issue involves nested partition probing, and the DOS parser issue involves partition metadata. The mount issue requires an ancestor directory on the target path to be swapped during a time-of-check to time-of-use window.

3

How can I determine whether my system is affected?

Identify installed util-linux-related packages and compare them with the packages covered by this security update. Review whether affected systems probe nested partitions, process DOS partition metadata, or use mount operations where target-path ancestor directories may be changed concurrently.

Company

Resources

Contact

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