{"id":"CVE-2026-72179","state":"PUBLISHED","title":"riscv: cacheinfo: Fix node reference leak in populate_cache_leaves","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: cacheinfo: Fix node reference leak in populate_cache_leaves\n\nCurrently, the while loop drops the reference to prev in each iteration.\nIf the loop terminates early due to a break, the final of_node_put(np)\ncorrectly drops the reference to the current node.\n\nHowever, if the loop terminates naturally because np == NULL, calling\nof_node_put(np) is a no-op. This leaves the last valid node stored in\nprev without its reference dropped, resulting in a node reference leak.\n\nFix this by changing the final `of_node_put(np)` to `of_node_put(prev)`.","publishedAt":"2026-08-15T05:53:42.980Z","updatedAt":"2026-08-17T05:09:41.910Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"2560c97f63bb99b26d9f19b23a4f66ea24c9dc14","versionType":"git"},{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"51afb7da697b698996351740b4f39fb05ce2afd4","versionType":"git"},{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"880ac50b0bfae06d7ab5f1843253adfb86aa173a","versionType":"git"},{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"f322955d9a1c344ed943752f05aacea7bc22e025","versionType":"git"},{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"36e4843fe39ea2f17f4de6d59fba26271916c184","versionType":"git"},{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"bf4a195f063b0a0805c1417f6aad1dd32ea48f0f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/kernel/cacheinfo.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.0","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/kernel/cacheinfo.c"]}],"references":["https://git.kernel.org/stable/c/2560c97f63bb99b26d9f19b23a4f66ea24c9dc14","https://git.kernel.org/stable/c/51afb7da697b698996351740b4f39fb05ce2afd4","https://git.kernel.org/stable/c/880ac50b0bfae06d7ab5f1843253adfb86aa173a","https://git.kernel.org/stable/c/f322955d9a1c344ed943752f05aacea7bc22e025","https://git.kernel.org/stable/c/36e4843fe39ea2f17f4de6d59fba26271916c184","https://git.kernel.org/stable/c/bf4a195f063b0a0805c1417f6aad1dd32ea48f0f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72179.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72179","state":"PUBLISHED","datePublished":"2026-08-15T05:53:42.980Z","dateUpdated":"2026-08-17T05:09:41.910Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.910Z"},"containers":{"cna":{"title":"riscv: cacheinfo: Fix node reference leak in populate_cache_leaves","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: cacheinfo: Fix node reference leak in populate_cache_leaves\n\nCurrently, the while loop drops the reference to prev in each iteration.\nIf the loop terminates early due to a break, the final of_node_put(np)\ncorrectly drops the reference to the current node.\n\nHowever, if the loop terminates naturally because np == NULL, calling\nof_node_put(np) is a no-op. This leaves the last valid node stored in\nprev without its reference dropped, resulting in a node reference leak.\n\nFix this by changing the final `of_node_put(np)` to `of_node_put(prev)`."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"2560c97f63bb99b26d9f19b23a4f66ea24c9dc14","versionType":"git"},{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"51afb7da697b698996351740b4f39fb05ce2afd4","versionType":"git"},{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"880ac50b0bfae06d7ab5f1843253adfb86aa173a","versionType":"git"},{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"f322955d9a1c344ed943752f05aacea7bc22e025","versionType":"git"},{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"36e4843fe39ea2f17f4de6d59fba26271916c184","versionType":"git"},{"version":"94f9bf118f1e294b3f2092f8bde02860f5e3ea3f","status":"affected","lessThan":"bf4a195f063b0a0805c1417f6aad1dd32ea48f0f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/kernel/cacheinfo.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.0","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/kernel/cacheinfo.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2560c97f63bb99b26d9f19b23a4f66ea24c9dc14"},{"url":"https://git.kernel.org/stable/c/51afb7da697b698996351740b4f39fb05ce2afd4"},{"url":"https://git.kernel.org/stable/c/880ac50b0bfae06d7ab5f1843253adfb86aa173a"},{"url":"https://git.kernel.org/stable/c/f322955d9a1c344ed943752f05aacea7bc22e025"},{"url":"https://git.kernel.org/stable/c/36e4843fe39ea2f17f4de6d59fba26271916c184"},{"url":"https://git.kernel.org/stable/c/bf4a195f063b0a0805c1417f6aad1dd32ea48f0f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:09:41.910Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}