{ "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": "2026-10-19T09:10:08.190Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:10:08.190Z" }, "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", "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" } ] } ] } ], "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" } } } }