- Issued:
- 2026-07-09
- Updated:
- 2026-07-09
RHSA-2026:37282 - Security Advisory
Synopsis
Important: unbound security update
Type/Severity
Security Advisory: Important
Red Hat Lightspeed patch analysis
Identify and remediate systems affected by this advisory.
Topic
An update for unbound is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.
Security Fix(es):
- unbound: Unbound: Denial of Service via excessive EDNS options (CVE-2026-41292)
- unbound: Unbound: Cache manipulation via 'ghost domain names' attack (CVE-2026-40622)
- unbound: Unbound: Denial of Service due to excessive resource consumption with large DNS Resource Record Sets (CVE-2026-44390)
- unbound: Unbound: Denial of Service due to degraded resolution performance in jostle logic (CVE-2026-42534)
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.
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
Affected Products
- Red Hat Enterprise Linux for x86_64 8 x86_64
- Red Hat Enterprise Linux for IBM z Systems 8 s390x
- Red Hat Enterprise Linux for Power, little endian 8 ppc64le
- Red Hat Enterprise Linux for ARM 64 8 aarch64
- Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 8.10 x86_64
- Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 8.10 aarch64
- Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 8.10 ppc64le
- Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 8.10 s390x
Fixes
- BZ - 2480125 - CVE-2026-41292 unbound: Unbound: Denial of Service via excessive EDNS options
- BZ - 2480130 - CVE-2026-44390 unbound: Unbound: Denial of Service due to excessive resource consumption with large DNS Resource Record Sets
- BZ - 2480131 - CVE-2026-42534 unbound: Unbound: Denial of Service due to degraded resolution performance in jostle logic
Note:
More recent versions of these packages may be available.
Click a package name for more details.
Red Hat Enterprise Linux for x86_64 8
| SRPM | |
|---|---|
| unbound-1.16.2-5.12.el8_10.src.rpm | SHA-256: b4466bdc0bb0836e7d9a0a5b280a5c69b03aebcd975d7827584e306fd81e6921 |
| x86_64 | |
| python3-unbound-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: 0d5f59f44edb0ece93f6b4e2c64c068f99761011122afc4760b60305c899bf76 |
| python3-unbound-debuginfo-1.16.2-5.12.el8_10.i686.rpm | SHA-256: 0e6017547892c1dcff5f8a7dcab3eea37fb0d8ae733ef3797251d798123056e9 |
| python3-unbound-debuginfo-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: 7f2e36a1ec937bc5a05fbce42bdadd257af43ff5c31467596d9f8fc661eda566 |
| unbound-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: f33edf319ad199459c792cf47f1a4cf48ba3bdb9557445f589834623b2c8d86a |
| unbound-debuginfo-1.16.2-5.12.el8_10.i686.rpm | SHA-256: 25144dd22606d5fd046d615edb5f75fedab702cc51b133e4e9c372c50c8ff2ee |
| unbound-debuginfo-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: 6a6401fed40a155d1e5efd42f5d2c3e0e0558e05e9423592a67c70079cacec23 |
| unbound-debugsource-1.16.2-5.12.el8_10.i686.rpm | SHA-256: 82e894ff792ef015500236ad5c283013d350149d27b799654057b4705b1ede9d |
| unbound-debugsource-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: cce6b4686625a2496aa4c5bb8eda6db857b393696526c5b428ddc9c3ebdf79f5 |
| unbound-devel-1.16.2-5.12.el8_10.i686.rpm | SHA-256: 132ae321b8e6951fc1f75330b855b5b0150b513d34095206acde4c1a8c67ef62 |
| unbound-devel-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: d13793116d660510adb20daf039483ebf00938095bcbe039756a060c5584ef5f |
| unbound-libs-1.16.2-5.12.el8_10.i686.rpm | SHA-256: 3198676e338b105479923db4b6816d60ee1323b95e94668bc7958b2f6cd1e21e |
| unbound-libs-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: 172f18de9ad089167ca644b579c2c97dba70dc6b8b16d4ad979a63e77ec46235 |
| unbound-libs-debuginfo-1.16.2-5.12.el8_10.i686.rpm | SHA-256: e87e4afe227a55e441cae39237c99fa7fee32224322cb05a7bc46f12012f1b8e |
| unbound-libs-debuginfo-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: 16c42c81b65359efd5da90212afa8a3cee5b01b8c2cab1b68ae1eb6994bb1da9 |
Red Hat Enterprise Linux for IBM z Systems 8
| SRPM | |
|---|---|
| unbound-1.16.2-5.12.el8_10.src.rpm | SHA-256: b4466bdc0bb0836e7d9a0a5b280a5c69b03aebcd975d7827584e306fd81e6921 |
| s390x | |
| python3-unbound-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: f79358cafb6b534be87225bd4d77bef2e33cb12b2dc13157cf590eee728faf01 |
| python3-unbound-debuginfo-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: 23f4bf503a2ca2f1984c17846d01f5ac8dbab15ccf54665a9d2f198b5ec17f8b |
| unbound-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: f54f2bb89bf6c835b31bedf1a4e5b80e8c695863b545ec056b91967dbd700c0c |
| unbound-debuginfo-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: 3c3525063b027db977eb567077763023bb909e0e14f2face171c47f3a2af6123 |
| unbound-debugsource-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: 4980b7fcc28f7993ee143588cb2b611453a9a7ee060aa128b96f5204e712ab86 |
| unbound-devel-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: 85c954507c918056a5834f665cdce98cc5302d3d0b29fc61957d31c2c98b7422 |
| unbound-libs-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: 9be5ab0ed9034da13d4c93e7db71a5c5805b528bc37789fe9ec933f6df44e0a7 |
| unbound-libs-debuginfo-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: ff9d3dfb87d393456d7508e8145a142f3808abc59a4898f8bac2a474b13e59af |
Red Hat Enterprise Linux for Power, little endian 8
| SRPM | |
|---|---|
| unbound-1.16.2-5.12.el8_10.src.rpm | SHA-256: b4466bdc0bb0836e7d9a0a5b280a5c69b03aebcd975d7827584e306fd81e6921 |
| ppc64le | |
| python3-unbound-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: 221cb1fccd3eca7a094db01a11c09e8614b9803eed2e50820ab14b7619556990 |
| python3-unbound-debuginfo-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: a6ff3ad51065cd2fe0800b5c581b5abe8d0161d819d94b9a8bcaeaa3f881113f |
| unbound-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: fa086de61917a9fba3a48800c099861a2fe0f17aa34b952b8e68ce43534beb51 |
| unbound-debuginfo-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: 92121507a0e73693d5d44037daaf6b590513d478422216450a76b52760b9237b |
| unbound-debugsource-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: 1173b2ca8bbd44a35a48cf863685f968edbf9cdf7e1221f87a5642dd864eca07 |
| unbound-devel-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: a5cc7b6cb8374af81ab9c3532578c7534812e6c2a447d8da85fdc6ed7631b416 |
| unbound-libs-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: b0daa1ba265a8444f3f598e7c7ebe744a690dea8be47ba463899fded17b4811c |
| unbound-libs-debuginfo-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: e1a0c0eac9c98f9d43e355ec03bb98c7bfa86b2074cb749bfde035fe8cb6898f |
Red Hat Enterprise Linux for ARM 64 8
| SRPM | |
|---|---|
| unbound-1.16.2-5.12.el8_10.src.rpm | SHA-256: b4466bdc0bb0836e7d9a0a5b280a5c69b03aebcd975d7827584e306fd81e6921 |
| aarch64 | |
| python3-unbound-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: a96ce73fa2c4eb1c9ff7cb09898b4313a994127d51d5e11498dd4c903ddd5677 |
| python3-unbound-debuginfo-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 76ba617a46e8ad68f5ffc8eef0224883f6b72569a5379965b44fb66c9eac10e9 |
| unbound-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 447399acdcef13584a2d305adb3ed418e0398e1425d80a9c769164c1ffc49997 |
| unbound-debuginfo-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 54bf501ce76f49f445cd5940fff3bc362ef493318af98c8666a25db9c997decb |
| unbound-debugsource-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 747dcd9e14a94a36d2568f750a348fb86584493e81c53770bb91ddab85ce9b0c |
| unbound-devel-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 0c0c1034c910d5f06340f88673bf13b54d988046e8eac7cc25afa2a99b681480 |
| unbound-libs-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 6743f47c870975e9f8b0d87e421c6fb953de04a29f39aaa99423b93d4d4f03f2 |
| unbound-libs-debuginfo-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: a22ba591fee2156ea80a4decf9670ecc4f31da2d4f7c203e74fb52a2f0829f87 |
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 8.10
| SRPM | |
|---|---|
| unbound-1.16.2-5.12.el8_10.src.rpm | SHA-256: b4466bdc0bb0836e7d9a0a5b280a5c69b03aebcd975d7827584e306fd81e6921 |
| x86_64 | |
| python3-unbound-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: 0d5f59f44edb0ece93f6b4e2c64c068f99761011122afc4760b60305c899bf76 |
| python3-unbound-debuginfo-1.16.2-5.12.el8_10.i686.rpm | SHA-256: 0e6017547892c1dcff5f8a7dcab3eea37fb0d8ae733ef3797251d798123056e9 |
| python3-unbound-debuginfo-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: 7f2e36a1ec937bc5a05fbce42bdadd257af43ff5c31467596d9f8fc661eda566 |
| unbound-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: f33edf319ad199459c792cf47f1a4cf48ba3bdb9557445f589834623b2c8d86a |
| unbound-debuginfo-1.16.2-5.12.el8_10.i686.rpm | SHA-256: 25144dd22606d5fd046d615edb5f75fedab702cc51b133e4e9c372c50c8ff2ee |
| unbound-debuginfo-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: 6a6401fed40a155d1e5efd42f5d2c3e0e0558e05e9423592a67c70079cacec23 |
| unbound-debugsource-1.16.2-5.12.el8_10.i686.rpm | SHA-256: 82e894ff792ef015500236ad5c283013d350149d27b799654057b4705b1ede9d |
| unbound-debugsource-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: cce6b4686625a2496aa4c5bb8eda6db857b393696526c5b428ddc9c3ebdf79f5 |
| unbound-devel-1.16.2-5.12.el8_10.i686.rpm | SHA-256: 132ae321b8e6951fc1f75330b855b5b0150b513d34095206acde4c1a8c67ef62 |
| unbound-devel-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: d13793116d660510adb20daf039483ebf00938095bcbe039756a060c5584ef5f |
| unbound-libs-1.16.2-5.12.el8_10.i686.rpm | SHA-256: 3198676e338b105479923db4b6816d60ee1323b95e94668bc7958b2f6cd1e21e |
| unbound-libs-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: 172f18de9ad089167ca644b579c2c97dba70dc6b8b16d4ad979a63e77ec46235 |
| unbound-libs-debuginfo-1.16.2-5.12.el8_10.i686.rpm | SHA-256: e87e4afe227a55e441cae39237c99fa7fee32224322cb05a7bc46f12012f1b8e |
| unbound-libs-debuginfo-1.16.2-5.12.el8_10.x86_64.rpm | SHA-256: 16c42c81b65359efd5da90212afa8a3cee5b01b8c2cab1b68ae1eb6994bb1da9 |
Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 8.10
| SRPM | |
|---|---|
| unbound-1.16.2-5.12.el8_10.src.rpm | SHA-256: b4466bdc0bb0836e7d9a0a5b280a5c69b03aebcd975d7827584e306fd81e6921 |
| aarch64 | |
| python3-unbound-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: a96ce73fa2c4eb1c9ff7cb09898b4313a994127d51d5e11498dd4c903ddd5677 |
| python3-unbound-debuginfo-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 76ba617a46e8ad68f5ffc8eef0224883f6b72569a5379965b44fb66c9eac10e9 |
| unbound-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 447399acdcef13584a2d305adb3ed418e0398e1425d80a9c769164c1ffc49997 |
| unbound-debuginfo-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 54bf501ce76f49f445cd5940fff3bc362ef493318af98c8666a25db9c997decb |
| unbound-debugsource-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 747dcd9e14a94a36d2568f750a348fb86584493e81c53770bb91ddab85ce9b0c |
| unbound-devel-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 0c0c1034c910d5f06340f88673bf13b54d988046e8eac7cc25afa2a99b681480 |
| unbound-libs-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: 6743f47c870975e9f8b0d87e421c6fb953de04a29f39aaa99423b93d4d4f03f2 |
| unbound-libs-debuginfo-1.16.2-5.12.el8_10.aarch64.rpm | SHA-256: a22ba591fee2156ea80a4decf9670ecc4f31da2d4f7c203e74fb52a2f0829f87 |
Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 8.10
| SRPM | |
|---|---|
| unbound-1.16.2-5.12.el8_10.src.rpm | SHA-256: b4466bdc0bb0836e7d9a0a5b280a5c69b03aebcd975d7827584e306fd81e6921 |
| ppc64le | |
| python3-unbound-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: 221cb1fccd3eca7a094db01a11c09e8614b9803eed2e50820ab14b7619556990 |
| python3-unbound-debuginfo-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: a6ff3ad51065cd2fe0800b5c581b5abe8d0161d819d94b9a8bcaeaa3f881113f |
| unbound-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: fa086de61917a9fba3a48800c099861a2fe0f17aa34b952b8e68ce43534beb51 |
| unbound-debuginfo-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: 92121507a0e73693d5d44037daaf6b590513d478422216450a76b52760b9237b |
| unbound-debugsource-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: 1173b2ca8bbd44a35a48cf863685f968edbf9cdf7e1221f87a5642dd864eca07 |
| unbound-devel-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: a5cc7b6cb8374af81ab9c3532578c7534812e6c2a447d8da85fdc6ed7631b416 |
| unbound-libs-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: b0daa1ba265a8444f3f598e7c7ebe744a690dea8be47ba463899fded17b4811c |
| unbound-libs-debuginfo-1.16.2-5.12.el8_10.ppc64le.rpm | SHA-256: e1a0c0eac9c98f9d43e355ec03bb98c7bfa86b2074cb749bfde035fe8cb6898f |
Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 8.10
| SRPM | |
|---|---|
| unbound-1.16.2-5.12.el8_10.src.rpm | SHA-256: b4466bdc0bb0836e7d9a0a5b280a5c69b03aebcd975d7827584e306fd81e6921 |
| s390x | |
| python3-unbound-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: f79358cafb6b534be87225bd4d77bef2e33cb12b2dc13157cf590eee728faf01 |
| python3-unbound-debuginfo-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: 23f4bf503a2ca2f1984c17846d01f5ac8dbab15ccf54665a9d2f198b5ec17f8b |
| unbound-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: f54f2bb89bf6c835b31bedf1a4e5b80e8c695863b545ec056b91967dbd700c0c |
| unbound-debuginfo-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: 3c3525063b027db977eb567077763023bb909e0e14f2face171c47f3a2af6123 |
| unbound-debugsource-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: 4980b7fcc28f7993ee143588cb2b611453a9a7ee060aa128b96f5204e712ab86 |
| unbound-devel-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: 85c954507c918056a5834f665cdce98cc5302d3d0b29fc61957d31c2c98b7422 |
| unbound-libs-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: 9be5ab0ed9034da13d4c93e7db71a5c5805b528bc37789fe9ec933f6df44e0a7 |
| unbound-libs-debuginfo-1.16.2-5.12.el8_10.s390x.rpm | SHA-256: ff9d3dfb87d393456d7508e8145a142f3808abc59a4898f8bac2a474b13e59af |
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