CVE-2026-97604 Affecting kernel-livepatch-6_4_0-150700_53_90-default package, versions <1-150700.15.3.1
Threat Intelligence
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Test your applications- Snyk IDSNYK-SLES157-KERNELLIVEPATCH6401507005390DEFAULT-22242379
- published5 Nov 2026
- disclosed3 Nov 2026
Introduced: 3 Nov 2026
NewCVE-2026-97604 (opens in a new tab)How to fix?
Upgrade SLES:15.7 kernel-livepatch-6_4_0-150700_53_90-default to version 1-150700.15.3.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-livepatch-6_4_0-150700_53_90-default package and not the kernel-livepatch-6_4_0-150700_53_90-default package as distributed by SLES.
See How to fix? for SLES:15.7 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
fbdev: vfb: defer cleanup until the last reference
FBIOGETCMAP takes a shallow snapshot of info->cmap and performs the usercopy after dropping info->lock. vfb_remove() frees the colormap immediately after unregistering the framebuffer, even when an open file still holds a reference to fb_info. A concurrent driver unbind can therefore free the colormap while the ioctl copies it to userspace.
KASAN reports:
BUG: KASAN: slab-use-after-free in _copy_to_user Read of size 512 by task poc/125
_copy_to_user (./include/linux/instrumented.h:129 ./include/linux/uaccess.h:201 lib/usercopy.c:24) fb_cmap_to_user (./include/linux/uaccess.h:230 drivers/video/fbdev/core/fbcmap.c:211) do_fb_ioctl (drivers/video/fbdev/core/fb_chrdev.c:114)
Allocated by task 1: fb_alloc_cmap_gfp (./include/linux/slab.h:973 ./include/linux/slab.h:1290 drivers/video/fbdev/core/fbcmap.c:108) vfb_probe (drivers/video/fbdev/vfb.c:459)
Freed by task 124: fb_dealloc_cmap (drivers/video/fbdev/core/fbcmap.c:151) vfb_remove (drivers/video/fbdev/vfb.c:489)
unregister_framebuffer() drops the registration reference, and fbdev calls fb_destroy after the last put_fb_info(). Move the registered framebuffer's cleanup into an fb_destroy callback so its colormap and screen buffer stay alive until all file references have been released.
References
- https://www.suse.com/security/cve/CVE-2026-97604.html
- https://bugzilla.suse.com/1283746
- https://git.kernel.org/stable/c/3c91e51a53cf805e551e5dc8149cd0539a6dbb9d
- https://git.kernel.org/stable/c/5ff1effb047e465cde193d7df95988aa1520035e
- https://git.kernel.org/stable/c/86356f13598f59f5acb1754895747dcdaf65a254
- https://git.kernel.org/stable/c/a0a34a40ed299c9c7cff6af163a5b883ee9d6d73
- https://git.kernel.org/stable/c/040ce3950f64a11e9ee5646c8aaa91fd2e29e245
- https://git.kernel.org/stable/c/ab664e279eb2a68e55895dd115a9488807280f07
- https://git.kernel.org/stable/c/bf49eac7ed11aabd0b9b790c062742a8e4be97c6
- https://git.kernel.org/stable/c/de5a0eda59fe4b3eacd1a67c992e54766bb6683f