{"id":"CVE-2026-43261","state":"PUBLISHED","title":"arm64: Add support for TSV110 Spectre-BHB mitigation","description":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: Add support for TSV110 Spectre-BHB mitigation\n\nThe TSV110 processor is vulnerable to the Spectre-BHB (Branch History\nBuffer) attack, which can be exploited to leak information through\nbranch prediction side channels. This commit adds the MIDR of TSV110\nto the list for software mitigation.","publishedAt":"2026-05-06T11:28:48.823Z","updatedAt":"2026-05-23T16:06:36.101Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e192c8baa69ac8a5585d61ac535aa1e5eb795e80","status":"affected","lessThan":"598c11dd4f4a9de31d854fcb9702f54c1c70f0d0","versionType":"git"},{"version":"4bbfd0c280254b273c564767021bb9b0f945148e","status":"affected","lessThan":"a8d0ad5d990b050a6db74218a34b5529085e16b8","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"cccf96c49f61e47d9332d6a4d1c7fe9a2df44440","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"fd7e360845d331f542854d552469544182e61134","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"5dbe1f14359735fa50ba0dd4a496125b5bc7f422","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"fd51d47fcacec3ca027eb65d8c44853d3b6cea95","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"ad0c356cae164ed5dbd1f4cfd438e46faa5292cb","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"e3baa5d4b361276efeb87b20d8beced451a7dbd5","versionType":"git"},{"version":"4dd8aae585a51a1d276911fe19096ad90144e9fe","status":"affected","versionType":"git"},{"version":"3e3904125fccd042fda24294624e8f66699fd06d","status":"affected","versionType":"git"},{"version":"c20d551744797000c4af993f7d59ef8c69732949","status":"affected","versionType":"git"},{"version":"9013fd4bc958b33c3b4d5a2eaf4ded9857600395","status":"affected","versionType":"git"},{"version":"0b2bf1b37b5ebd90e69e30d8c2d6e1cd0c1f37b4","status":"affected","versionType":"git"},{"version":"5.10.105","status":"affected","lessThan":"5.10.252","versionType":"semver"},{"version":"5.15.28","status":"affected","lessThan":"5.15.202","versionType":"semver"},{"version":"4.9.310","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.275","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.236","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.186","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"5.16.14","status":"affected","lessThan":"5.17","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/kernel/proton-pack.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/kernel/proton-pack.c"]}],"references":["https://git.kernel.org/stable/c/598c11dd4f4a9de31d854fcb9702f54c1c70f0d0","https://git.kernel.org/stable/c/a8d0ad5d990b050a6db74218a34b5529085e16b8","https://git.kernel.org/stable/c/cccf96c49f61e47d9332d6a4d1c7fe9a2df44440","https://git.kernel.org/stable/c/fd7e360845d331f542854d552469544182e61134","https://git.kernel.org/stable/c/5dbe1f14359735fa50ba0dd4a496125b5bc7f422","https://git.kernel.org/stable/c/fd51d47fcacec3ca027eb65d8c44853d3b6cea95","https://git.kernel.org/stable/c/ad0c356cae164ed5dbd1f4cfd438e46faa5292cb","https://git.kernel.org/stable/c/e3baa5d4b361276efeb87b20d8beced451a7dbd5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43261.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43261","state":"PUBLISHED","datePublished":"2026-05-06T11:28:48.823Z","dateUpdated":"2026-05-23T16:06:36.101Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.997Z"},"containers":{"cna":{"title":"arm64: Add support for TSV110 Spectre-BHB mitigation","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: Add support for TSV110 Spectre-BHB mitigation\n\nThe TSV110 processor is vulnerable to the Spectre-BHB (Branch History\nBuffer) attack, which can be exploited to leak information through\nbranch prediction side channels. This commit adds the MIDR of TSV110\nto the list for software mitigation."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e192c8baa69ac8a5585d61ac535aa1e5eb795e80","status":"affected","lessThan":"598c11dd4f4a9de31d854fcb9702f54c1c70f0d0","versionType":"git"},{"version":"4bbfd0c280254b273c564767021bb9b0f945148e","status":"affected","lessThan":"a8d0ad5d990b050a6db74218a34b5529085e16b8","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"cccf96c49f61e47d9332d6a4d1c7fe9a2df44440","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"fd7e360845d331f542854d552469544182e61134","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"5dbe1f14359735fa50ba0dd4a496125b5bc7f422","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"fd51d47fcacec3ca027eb65d8c44853d3b6cea95","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"ad0c356cae164ed5dbd1f4cfd438e46faa5292cb","versionType":"git"},{"version":"558c303c9734af5a813739cd284879227f7297d2","status":"affected","lessThan":"e3baa5d4b361276efeb87b20d8beced451a7dbd5","versionType":"git"},{"version":"4dd8aae585a51a1d276911fe19096ad90144e9fe","status":"affected","versionType":"git"},{"version":"3e3904125fccd042fda24294624e8f66699fd06d","status":"affected","versionType":"git"},{"version":"c20d551744797000c4af993f7d59ef8c69732949","status":"affected","versionType":"git"},{"version":"9013fd4bc958b33c3b4d5a2eaf4ded9857600395","status":"affected","versionType":"git"},{"version":"0b2bf1b37b5ebd90e69e30d8c2d6e1cd0c1f37b4","status":"affected","versionType":"git"},{"version":"5.10.105","status":"affected","lessThan":"5.10.252","versionType":"semver"},{"version":"5.15.28","status":"affected","lessThan":"5.15.202","versionType":"semver"},{"version":"4.9.310","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.275","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.236","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.186","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"5.16.14","status":"affected","lessThan":"5.17","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/kernel/proton-pack.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"5.10.252","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.202","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/kernel/proton-pack.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/598c11dd4f4a9de31d854fcb9702f54c1c70f0d0"},{"url":"https://git.kernel.org/stable/c/a8d0ad5d990b050a6db74218a34b5529085e16b8"},{"url":"https://git.kernel.org/stable/c/cccf96c49f61e47d9332d6a4d1c7fe9a2df44440"},{"url":"https://git.kernel.org/stable/c/fd7e360845d331f542854d552469544182e61134"},{"url":"https://git.kernel.org/stable/c/5dbe1f14359735fa50ba0dd4a496125b5bc7f422"},{"url":"https://git.kernel.org/stable/c/fd51d47fcacec3ca027eb65d8c44853d3b6cea95"},{"url":"https://git.kernel.org/stable/c/ad0c356cae164ed5dbd1f4cfd438e46faa5292cb"},{"url":"https://git.kernel.org/stable/c/e3baa5d4b361276efeb87b20d8beced451a7dbd5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T16:06:36.101Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.105","versionEndExcluding":"5.10.252"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.28","versionEndExcluding":"5.15.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.18.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9.310"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.275"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.236"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.186"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16.14"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}