Red Hat Product Errata RHSA-2026:9666 - Security Advisory Issued: 2026-04-22 Updated: 2026-04-22 RHSA-2026:9666 - Security Advisory Overview Updated Packages Synopsis Moderate: wireshark security update Type/Severity Security Advisory: Moderate Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for wireshark is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Moderate. 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 wireshark packages contain a network protocol analyzer used to capture and browse the traffic running on a computer network. Security Fix(es): wireshark: Buffer Over-read in Wireshark (CVE-2026-3203) wireshark: Improperly Controlled Sequential Memory Allocation in Wireshark (CVE-2026-3201) 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: https://access.redhat.com/articles/11258 Affected Products Red Hat Enterprise Linux for x86_64 10 x86_64 Red Hat Enterprise Linux for IBM z Systems 10 s390x Red Hat Enterprise Linux for Power, little endian 10 ppc64le Red Hat Enterprise Linux for ARM 64 10 aarch64 Red Hat CodeReady Linux Builder for x86_64 10 x86_64 Red Hat CodeReady Linux Builder for Power, little endian 10 ppc64le Red Hat CodeReady Linux Builder for ARM 64 10 aarch64 Red Hat CodeReady Linux Builder for IBM z Systems 10 s390x Fixes BZ - 2442639 - CVE-2026-3203 wireshark: Buffer Over-read in Wireshark BZ - 2442641 - CVE-2026-3201 wireshark: Improperly Controlled Sequential Memory Allocation in Wireshark CVEs CVE-2026-3201 CVE-2026-3203 References https://access.redhat.com/security/updates/classification/#moderate Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 10 SRPM wireshark-4.4.2-4.el10_1.4.src.rpm SHA-256: ada9bfd8a00a851bf18891606f4f8fd3ce1f2f37dfe8c6810d481d04bba2a2e8 x86_64 wireshark-4.4.2-4.el10_1.4.x86_64.rpm SHA-256: a902700baf0ed84e8e80a73ba420671a02d9e0b8930fbb1ae3c296a9fd89248c wireshark-cli-4.4.2-4.el10_1.4.x86_64.rpm SHA-256: c9577826afd10f539ef225cf84b4461544028369f71efc38b8b2e2efed49ad3f wireshark-cli-debuginfo-4.4.2-4.el10_1.4.x86_64.rpm SHA-256: df2fdd9a0464a6a391a3aafd766718ada73fcc7d44326afba519cc1a705da360 wireshark-debuginfo-4.4.2-4.el10_1.4.x86_64.rpm SHA-256: 8a37311baf8920ffa9bbe910b81d9205ceb773b1fd2fb3b973315bd0cd11ab32 wireshark-debugsource-4.4.2-4.el10_1.4.x86_64.rpm SHA-256: a862de090312e5df23ad7799b083f43747f2817235b29e51cd99693d9e5dff95 Red Hat Enterprise Linux for IBM z Systems 10 SRPM wireshark-4.4.2-4.el10_1.4.src.rpm SHA-256: ada9bfd8a00a851bf18891606f4f8fd3ce1f2f37dfe8c6810d481d04bba2a2e8 s390x wireshark-4.4.2-4.el10_1.4.s390x.rpm SHA-256: 0dac4ed3bc43112c002db38d8dfb18688d279e4a6a88b5e7fad91454c1e3524c wireshark-cli-4.4.2-4.el10_1.4.s390x.rpm SHA-256: 99c338c96d82405fe9db3948a117bef56d4538b6dcefac7f5eef8fcb2e2e1aa2 wireshark-cli-debuginfo-4.4.2-4.el10_1.4.s390x.rpm SHA-256: 972b95ac6fa7d3ff48cca281153df556c8ad1156d8700d525378ce34dcf872dc wireshark-debuginfo-4.4.2-4.el10_1.4.s390x.rpm SHA-256: 5ceb10840a7e0bfd64c6020e01bfe1ad429b9fb401c070ebc618e99687cf98c0 wireshark-debugsource-4.4.2-4.el10_1.4.s390x.rpm SHA-256: 7f37da0e0f8d7bf96c56f9d814344b599522d0dedd396e069484ea84b2cea861 Red Hat Enterprise Linux for Power, little endian 10 SRPM wireshark-4.4.2-4.el10_1.4.src.rpm SHA-256: ada9bfd8a00a851bf18891606f4f8fd3ce1f2f37dfe8c6810d481d04bba2a2e8 ppc64le wireshark-4.4.2-4.el10_1.4.ppc64le.rpm SHA-256: 932663faaa5fae09d7fb989d1aa1fdc71911c04ab6146ea8bdec74010fb030b7 wireshark-cli-4.4.2-4.el10_1.4.ppc64le.rpm SHA-256: 3ac23e41779f1e46cea5a28a23f3d5f2a780c82a2080c00466f41197f88a5947 wireshark-cli-debuginfo-4.4.2-4.el10_1.4.ppc64le.rpm SHA-256: fabeaeaef93beef3112f17a69087420d5a6d15a377f66dcdf66fb37f903d4963 wireshark-debuginfo-4.4.2-4.el10_1.4.ppc64le.rpm SHA-256: 8ff173c5abe5af09641ee90d7f3e158a01bb039c74d8c33407004852cc1187b3 wireshark-debugsource-4.4.2-4.el10_1.4.ppc64le.rpm SHA-256: d5e6b6d11d66ae35649bf04267ca801d97241f8009c957bf0bb2cf0ae423776d Red Hat Enterprise Linux for ARM 64 10 SRPM wireshark-4.4.2-4.el10_1.4.src.rpm SHA-256: ada9bfd8a00a851bf18891606f4f8fd3ce1f2f37dfe8c6810d481d04bba2a2e8 aarch64 wireshark-4.4.2-4.el10_1.4.aarch64.rpm SHA-256: b7986510b21ab4c1ec917db44d7db531e42ce323d513c938ea1d4cfcec8e1f71 wireshark-cli-4.4.2-4.el10_1.4.aarch64.rpm SHA-256: b6d9d6c86f4fada7b31909e15f3e32f25b2d141b83657b22694e6602847a3d77 wireshark-cli-debuginfo-4.4.2-4.el10_1.4.aarch64.rpm SHA-256: e8ce26d09457121d43510a6f1eb30fee0a2f1e5adf71f63d4b877d497f74b108 wireshark-debuginfo-4.4.2-4.el10_1.4.aarch64.rpm SHA-256: 97d65c48f258fcd6a1556d7b76cbee829c8a768b8e88e00a832bb02e8dfe6087 wireshark-debugsource-4.4.2-4.el10_1.4.aarch64.rpm SHA-256: a281d8cc690689cdf0d35090b6750871b6e4fb4996b566918dc710db20e1f77d Red Hat CodeReady Linux Builder for x86_64 10 SRPM x86_64 wireshark-cli-debuginfo-4.4.2-4.el10_1.4.x86_64.rpm SHA-256: df2fdd9a0464a6a391a3aafd766718ada73fcc7d44326afba519cc1a705da360 wireshark-debuginfo-4.4.2-4.el10_1.4.x86_64.rpm SHA-256: 8a37311baf8920ffa9bbe910b81d9205ceb773b1fd2fb3b973315bd0cd11ab32 wireshark-debugsource-4.4.2-4.el10_1.4.x86_64.rpm SHA-256: a862de090312e5df23ad7799b083f43747f2817235b29e51cd99693d9e5dff95 wireshark-devel-4.4.2-4.el10_1.4.x86_64.rpm SHA-256: ebbbcf88159742c52a0f207b6fd32f1db50aa318ae5b311a397e8218eae15f91 Red Hat CodeReady Linux Builder for Power, little endian 10 SRPM ppc64le wireshark-cli-debuginfo-4.4.2-4.el10_1.4.ppc64le.rpm SHA-256: fabeaeaef93beef3112f17a69087420d5a6d15a377f66dcdf66fb37f903d4963 wireshark-debuginfo-4.4.2-4.el10_1.4.ppc64le.rpm SHA-256: 8ff173c5abe5af09641ee90d7f3e158a01bb039c74d8c33407004852cc1187b3 wireshark-debugsource-4.4.2-4.el10_1.4.ppc64le.rpm SHA-256: d5e6b6d11d66ae35649bf04267ca801d97241f8009c957bf0bb2cf0ae423776d wireshark-devel-4.4.2-4.el10_1.4.ppc64le.rpm SHA-256: 880da1e4e5680fdfb82764c04da1457c9127c558ddfecabd03afc3d448d9b52d Red Hat CodeReady Linux Builder for ARM 64 10 SRPM aarch64 wireshark-cli-debuginfo-4.4.2-4.el10_1.4.aarch64.rpm SHA-256: e8ce26d09457121d43510a6f1eb30fee0a2f1e5adf71f63d4b877d497f74b108 wireshark-debuginfo-4.4.2-4.el10_1.4.aarch64.rpm SHA-256: 97d65c48f258fcd6a1556d7b76cbee829c8a768b8e88e00a832bb02e8dfe6087 wireshark-debugsource-4.4.2-4.el10_1.4.aarch64.rpm SHA-256: a281d8cc690689cdf0d35090b6750871b6e4fb4996b566918dc710db20e1f77d wireshark-devel-4.4.2-4.el10_1.4.aarch64.rpm SHA-256: 7e6bf945519b4c059ec2a80ca95883d9d07ded0115e9b5f3fc28133ae2858a11 Red Hat CodeReady Linux Builder for IBM z Systems 10 SRPM s390x wireshark-cli-debuginfo-4.4.2-4.el10_1.4.s390x.rpm SHA-256: 972b95ac6fa7d3ff48cca281153df556c8ad1156d8700d525378ce34dcf872dc wireshark-debuginfo-4.4.2-4.el10_1.4.s390x.rpm SHA-256: 5ceb10840a7e0bfd64c6020e01bfe1ad429b9fb401c070ebc618e99687cf98c0 wireshark-debugsource-4.4.2-4.el10_1.4.s390x.rpm SHA-256: 7f37da0e0f8d7bf96c56f9d814344b599522d0dedd396e069484ea84b2cea861 wireshark-devel-4.4.2-4.el10_1.4.s390x.rpm SHA-256: 5d7dae642064d7cb29f589b9544c23fcdaec6a773a96721b7ef97efe62bcba92 The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .