{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45891","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-13T15:03:33.083Z","datePublished":"2026-05-27T12:17:02.306Z","dateUpdated":"2026-05-27T12:17:02.306Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-27T12:17:02.306Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hns3: fix double free issue for tx spare buffer\n\nIn hns3_set_ringparam(), a temporary copy (tmp_rings) of the ring structure\nis created for rollback. However, the tx_spare pointer in the original\nring handle is incorrectly left pointing to the old backup memory.\n\nLater, if memory allocation fails in hns3_init_all_ring() during the setup,\nthe error path attempts to free all newly allocated rings. Since tx_spare\ncontains a stale (non-NULL) pointer from the backup, it is mistaken for\na newly allocated buffer and is erroneously freed, leading to a double-free\nof the backup memory.\n\nThe root cause is that the tx_spare field was not cleared after its value\nwas saved in tmp_rings, leaving a dangling pointer.\n\nFix this by setting tx_spare to NULL in the original ring structure\nwhen the creation of the new `tx_spare` fails. This ensures the\nerror cleanup path only frees genuinely newly allocated buffers."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hns3/hns3_enet.c"],"versions":[{"version":"907676b130711fd1f627824559e92259db2061d1","lessThan":"fb6a4c376d454b425555b1b0bda36e99f56ec307","status":"affected","versionType":"git"},{"version":"907676b130711fd1f627824559e92259db2061d1","lessThan":"43015461662d41dcfb3bb95fadd8a2a42ad8eacf","status":"affected","versionType":"git"},{"version":"907676b130711fd1f627824559e92259db2061d1","lessThan":"6dc10494cfe27b6f1e9adb7e293293ae39c50b7c","status":"affected","versionType":"git"},{"version":"907676b130711fd1f627824559e92259db2061d1","lessThan":"d2c785733dfb853ea0b53984c75662a1af230a94","status":"affected","versionType":"git"},{"version":"907676b130711fd1f627824559e92259db2061d1","lessThan":"fdbccddb7e7822016601829f95de4008e193f7bc","status":"affected","versionType":"git"},{"version":"907676b130711fd1f627824559e92259db2061d1","lessThan":"c3659273860bed0c8e573b865e3769abc51225a8","status":"affected","versionType":"git"},{"version":"907676b130711fd1f627824559e92259db2061d1","lessThan":"6d2f142b1e4b203387a92519d9d2e34752a79dbb","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hns3/hns3_enet.c"],"versions":[{"version":"5.14","status":"affected"},{"version":"0","lessThan":"5.14","status":"unaffected","versionType":"semver"},{"version":"5.15.202","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.165","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.128","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.75","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.14","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.4","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"5.15.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.14","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/fb6a4c376d454b425555b1b0bda36e99f56ec307"},{"url":"https://git.kernel.org/stable/c/43015461662d41dcfb3bb95fadd8a2a42ad8eacf"},{"url":"https://git.kernel.org/stable/c/6dc10494cfe27b6f1e9adb7e293293ae39c50b7c"},{"url":"https://git.kernel.org/stable/c/d2c785733dfb853ea0b53984c75662a1af230a94"},{"url":"https://git.kernel.org/stable/c/fdbccddb7e7822016601829f95de4008e193f7bc"},{"url":"https://git.kernel.org/stable/c/c3659273860bed0c8e573b865e3769abc51225a8"},{"url":"https://git.kernel.org/stable/c/6d2f142b1e4b203387a92519d9d2e34752a79dbb"}],"title":"net: hns3: fix double free issue for tx spare buffer","x_generator":{"engine":"bippy-1.2.0"}}}}