{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97604","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-24T16:01:01.158Z","datePublished":"2026-09-25T10:22:16.613Z","dateUpdated":"2026-10-03T11:00:08.650Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-03T11:00:08.650Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: vfb: defer cleanup until the last reference\n\nFBIOGETCMAP takes a shallow snapshot of info->cmap and performs the\nusercopy after dropping info->lock. vfb_remove() frees the colormap\nimmediately after unregistering the framebuffer, even when an open file\nstill holds a reference to fb_info. A concurrent driver unbind can\ntherefore free the colormap while the ioctl copies it to userspace.\n\nKASAN reports:\n\n  BUG: KASAN: slab-use-after-free in _copy_to_user\n  Read of size 512 by task poc/125\n\n   _copy_to_user (./include/linux/instrumented.h:129 ./include/linux/uaccess.h:201 lib/usercopy.c:24)\n   fb_cmap_to_user (./include/linux/uaccess.h:230 drivers/video/fbdev/core/fbcmap.c:211)\n   do_fb_ioctl (drivers/video/fbdev/core/fb_chrdev.c:114)\n\n   Allocated by task 1:\n   fb_alloc_cmap_gfp (./include/linux/slab.h:973 ./include/linux/slab.h:1290 drivers/video/fbdev/core/fbcmap.c:108)\n   vfb_probe (drivers/video/fbdev/vfb.c:459)\n\n   Freed by task 124:\n   fb_dealloc_cmap (drivers/video/fbdev/core/fbcmap.c:151)\n   vfb_remove (drivers/video/fbdev/vfb.c:489)\n\nunregister_framebuffer() drops the registration reference, and fbdev calls\nfb_destroy after the last put_fb_info(). Move the registered framebuffer's\ncleanup into an fb_destroy callback so its colormap and screen buffer stay\nalive until all file references have been released."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/video/fbdev/vfb.c"],"versions":[{"version":"5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a","lessThan":"bf49eac7ed11aabd0b9b790c062742a8e4be97c6","status":"affected","versionType":"git"},{"version":"5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a","lessThan":"040ce3950f64a11e9ee5646c8aaa91fd2e29e245","status":"affected","versionType":"git"},{"version":"5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a","lessThan":"ab664e279eb2a68e55895dd115a9488807280f07","status":"affected","versionType":"git"},{"version":"5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a","lessThan":"de5a0eda59fe4b3eacd1a67c992e54766bb6683f","status":"affected","versionType":"git"},{"version":"5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a","lessThan":"86356f13598f59f5acb1754895747dcdaf65a254","status":"affected","versionType":"git"},{"version":"5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a","lessThan":"5ff1effb047e465cde193d7df95988aa1520035e","status":"affected","versionType":"git"},{"version":"5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a","lessThan":"3c91e51a53cf805e551e5dc8149cd0539a6dbb9d","status":"affected","versionType":"git"},{"version":"5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a","lessThan":"a0a34a40ed299c9c7cff6af163a5b883ee9d6d73","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/video/fbdev/vfb.c"],"versions":[{"version":"2.6.30","status":"affected"},{"version":"0","lessThan":"2.6.30","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc3","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":"2.6.30","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"7.3-rc3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/bf49eac7ed11aabd0b9b790c062742a8e4be97c6"},{"url":"https://git.kernel.org/stable/c/040ce3950f64a11e9ee5646c8aaa91fd2e29e245"},{"url":"https://git.kernel.org/stable/c/ab664e279eb2a68e55895dd115a9488807280f07"},{"url":"https://git.kernel.org/stable/c/de5a0eda59fe4b3eacd1a67c992e54766bb6683f"},{"url":"https://git.kernel.org/stable/c/86356f13598f59f5acb1754895747dcdaf65a254"},{"url":"https://git.kernel.org/stable/c/5ff1effb047e465cde193d7df95988aa1520035e"},{"url":"https://git.kernel.org/stable/c/3c91e51a53cf805e551e5dc8149cd0539a6dbb9d"},{"url":"https://git.kernel.org/stable/c/a0a34a40ed299c9c7cff6af163a5b883ee9d6d73"}],"title":"fbdev: vfb: defer cleanup until the last reference","x_generator":{"engine":"bippy-1.2.0"}}}}