{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23056","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:45.951Z","datePublished":"2026-02-04T16:07:34.787Z","dateUpdated":"2026-05-11T21:59:08.964Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:59:08.964Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nuacce: implement mremap in uacce_vm_ops to return -EPERM\n\nThe current uacce_vm_ops does not support the mremap operation of\nvm_operations_struct. Implement .mremap to return -EPERM to remind\nusers.\n\nThe reason we need to explicitly disable mremap is that when the\ndriver does not implement .mremap, it uses the default mremap\nmethod. This could lead to a risk scenario:\n\nAn application might first mmap address p1, then mremap to p2,\nfollowed by munmap(p1), and finally munmap(p2). Since the default\nmremap copies the original vma's vm_private_data (i.e., q) to the\nnew vma, both munmap operations would trigger vma_close, causing\nq->qfr to be freed twice(qfr will be set to null here, so repeated\nrelease is ok)."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/misc/uacce/uacce.c"],"versions":[{"version":"015d239ac0142ad0e26567fd890ef8d171f13709","lessThan":"78d99f062d42e3af2ca46bde1a8e46e0dfd372e3","status":"affected","versionType":"git"},{"version":"015d239ac0142ad0e26567fd890ef8d171f13709","lessThan":"ebfa85658a39b49ec3901ceea7535b73aa0429e6","status":"affected","versionType":"git"},{"version":"015d239ac0142ad0e26567fd890ef8d171f13709","lessThan":"75b29bdc935ff93b8e8bf6f6b4d8a4810b26e06f","status":"affected","versionType":"git"},{"version":"015d239ac0142ad0e26567fd890ef8d171f13709","lessThan":"4c042bc71474dbe417c268f4bfb8ec196f802f07","status":"affected","versionType":"git"},{"version":"015d239ac0142ad0e26567fd890ef8d171f13709","lessThan":"a407ddd61b3e6afc5ccfcd1478797171cf5686ee","status":"affected","versionType":"git"},{"version":"015d239ac0142ad0e26567fd890ef8d171f13709","lessThan":"ba29b59d124e725e0377f09b2044909c91d657a1","status":"affected","versionType":"git"},{"version":"015d239ac0142ad0e26567fd890ef8d171f13709","lessThan":"02695347be532b628f22488300d40c4eba48b9b7","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/misc/uacce/uacce.c"],"versions":[{"version":"5.7","status":"affected"},{"version":"0","lessThan":"5.7","status":"unaffected","versionType":"semver"},{"version":"5.10.249","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.199","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.162","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.122","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.68","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.8","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","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":"5.7","versionEndExcluding":"5.10.249"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"5.15.199"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.1.162"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.6.122"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.12.68"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.18.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/78d99f062d42e3af2ca46bde1a8e46e0dfd372e3"},{"url":"https://git.kernel.org/stable/c/ebfa85658a39b49ec3901ceea7535b73aa0429e6"},{"url":"https://git.kernel.org/stable/c/75b29bdc935ff93b8e8bf6f6b4d8a4810b26e06f"},{"url":"https://git.kernel.org/stable/c/4c042bc71474dbe417c268f4bfb8ec196f802f07"},{"url":"https://git.kernel.org/stable/c/a407ddd61b3e6afc5ccfcd1478797171cf5686ee"},{"url":"https://git.kernel.org/stable/c/ba29b59d124e725e0377f09b2044909c91d657a1"},{"url":"https://git.kernel.org/stable/c/02695347be532b628f22488300d40c4eba48b9b7"}],"title":"uacce: implement mremap in uacce_vm_ops to return -EPERM","x_generator":{"engine":"bippy-1.2.0"}}}}