{"id":"CVE-2026-68334","state":"PUBLISHED","title":"rxrpc: fix io_thread race in rxrpc_wake_up_io_thread()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: fix io_thread race in rxrpc_wake_up_io_thread()\n\nrxrpc_wake_up_io_thread() checks local->io_thread before waking it, but\nthen reloads the pointer for wake_up_process().\n\nlocal->io_thread is cleared with WRITE_ONCE() when the I/O thread exits, so\nthe second load can see NULL even if the first load did not.\n\nTake a READ_ONCE() snapshot and use it for both the NULL check and the\nwake_up_process() call, as rxrpc_encap_rcv() already does.","publishedAt":"2026-08-10T12:03:10.538Z","updatedAt":"2026-08-17T05:03:33.108Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5800b1cf3fd8ccab752a101865be1e76dac33142","status":"affected","lessThan":"c9165e199f56997f2f2deb5d3ec2dfab98dfa288","versionType":"git"},{"version":"5800b1cf3fd8ccab752a101865be1e76dac33142","status":"affected","lessThan":"092b42cf3f6013eec43607ecbcad674723649514","versionType":"git"},{"version":"5800b1cf3fd8ccab752a101865be1e76dac33142","status":"affected","lessThan":"745fb794c3e933c023af9dbb5876a5e16ad2dc71","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/rxrpc/ar-internal.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","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":["net/rxrpc/ar-internal.h"]}],"references":["https://git.kernel.org/stable/c/c9165e199f56997f2f2deb5d3ec2dfab98dfa288","https://git.kernel.org/stable/c/092b42cf3f6013eec43607ecbcad674723649514","https://git.kernel.org/stable/c/745fb794c3e933c023af9dbb5876a5e16ad2dc71"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68334.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68334","state":"PUBLISHED","datePublished":"2026-08-10T12:03:10.538Z","dateUpdated":"2026-08-17T05:03:33.108Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.383Z"},"containers":{"cna":{"title":"rxrpc: fix io_thread race in rxrpc_wake_up_io_thread()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nrxrpc: fix io_thread race in rxrpc_wake_up_io_thread()\n\nrxrpc_wake_up_io_thread() checks local->io_thread before waking it, but\nthen reloads the pointer for wake_up_process().\n\nlocal->io_thread is cleared with WRITE_ONCE() when the I/O thread exits, so\nthe second load can see NULL even if the first load did not.\n\nTake a READ_ONCE() snapshot and use it for both the NULL check and the\nwake_up_process() call, as rxrpc_encap_rcv() already does."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5800b1cf3fd8ccab752a101865be1e76dac33142","status":"affected","lessThan":"c9165e199f56997f2f2deb5d3ec2dfab98dfa288","versionType":"git"},{"version":"5800b1cf3fd8ccab752a101865be1e76dac33142","status":"affected","lessThan":"092b42cf3f6013eec43607ecbcad674723649514","versionType":"git"},{"version":"5800b1cf3fd8ccab752a101865be1e76dac33142","status":"affected","lessThan":"745fb794c3e933c023af9dbb5876a5e16ad2dc71","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/rxrpc/ar-internal.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","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":["net/rxrpc/ar-internal.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/c9165e199f56997f2f2deb5d3ec2dfab98dfa288"},{"url":"https://git.kernel.org/stable/c/092b42cf3f6013eec43607ecbcad674723649514"},{"url":"https://git.kernel.org/stable/c/745fb794c3e933c023af9dbb5876a5e16ad2dc71"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:03:33.108Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}