CVE-2023-53075
In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix invalid address access in lookup_rec() when index is 0 KASAN reported follow problem: BUG: KASAN: use-after-free in lookup_rec Read of size 8 at addr ffff000199270ff0 by…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix invalid address access in lookup_rec() when index is 0 KASAN reported follow problem: BUG: KASAN: use-after-free in lookup_rec Read of size 8 at addr ffff000199270ff0 by task modprobe CPU: 2 Comm: modprobe Call trace: kasan_report __asan_load8 lookup_rec ftrace_location arch_check_ftrace_location check_kprobe_address_safe register_kprobe When checking pg->records[pg->index - 1].ip in lookup_rec(), it can get a pg which is newly added to ftrace_pages_start in ftrace_process_locs(). Before the first pg->index++, index is 0 and accessing pg->records[-1].ip will cause this problem. Don't check the ip when pg->index is 0.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.20% probability · 10th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/2a0d71fabfeb349216d33f001a6421b1768bd3a9Patch
- https://git.kernel.org/stable/c/2de28e5ce34b22b73b833a21e2c45ae3aade3964Patch
- https://git.kernel.org/stable/c/4f84f31f63416b0f02fc146ffdc4ab32723eb7e8Patch
- https://git.kernel.org/stable/c/7569ee04b0e3b32df79f64db3a7138573edad9bcPatch
- https://git.kernel.org/stable/c/83c3b2f4e7c61367c7b24551f4c6eb94bbdda283Patch
- https://git.kernel.org/stable/c/ac58b88ccbbb8e9fb83e137cee04a856b1ea6635Patch
- https://git.kernel.org/stable/c/ee92fa443358f4fc0017c1d0d325c27b37802504Patch
- https://git.kernel.org/stable/c/f1bd8b7fd890d87d0dc4dedc6287ea34dd07c0b4Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.