CVE-2026-99219
In the Linux kernel, the following vulnerability has been resolved: ftrace: Initialize modname and offset in print_rec() print_rec() leaves 'modname' and 'offs…
Impact
In the Linux kernel, the following vulnerability has been resolved: ftrace: Initialize modname and offset in print_rec() print_rec() leaves 'modname' and 'offset' uninitialized and kallsyms_lookup() only sets them on success. When the lookup fails like when a module is being loaded or unloaded, 'modname' holds a garbage value, passes the 'if (modname)' check, and is dereferenced by seq_printf(). Oops: general protection fault RIP: 0010:string+0x48/0xe0 Call Trace: vsnprintf+0x1f5/0x650 seq_printf+0x8e/0xb0 print_rec+0x6c/0xc0 t_show+0x4c/0x440 seq_read_iter+0x119/0x480 This can be triggered by reading available_filter_functions while a module is being loaded or unloaded. Initialize both variables so a failed lookup skips the module name.
Affected products · Linux
| Product | Affected versions |
|---|---|
| Linux | from b39181f7c6907dc66ff937b74758671fa6ba430c before 753d5cba113a52cb155428f4ea93a4b0148c4bf1 from b39181f7c6907dc66ff937b74758671fa6ba430c before 0e5ff07be834abaf4280e1dca7f9591e339d0960 from b39181f7c6907dc66ff937b74758671fa6ba430c before e2e6fb972bfec4a0551bc7c185bdb17f78f94997 from b39181f7c6907dc66ff937b74758671fa6ba430c before 8932e5a4df110a25578728526bb5a3dbc849d8a2 from b39181f7c6907dc66ff937b74758671fa6ba430c before 7271c064dd60d4456c5b90da757acd9420d06697 from b39181f7c6907dc66ff937b74758671fa6ba430c before d97dba9ff13987d1fc415408557a54adde980311 |
References
- NVD record
- CVE.org record
- GitHub advisory
- https://git.kernel.org/stable/c/753d5cba113a52cb155428f4ea93a4b0148c4bf1
- https://git.kernel.org/stable/c/0e5ff07be834abaf4280e1dca7f9591e339d0960
- https://git.kernel.org/stable/c/e2e6fb972bfec4a0551bc7c185bdb17f78f94997
- https://git.kernel.org/stable/c/8932e5a4df110a25578728526bb5a3dbc849d8a2
- https://git.kernel.org/stable/c/7271c064dd60d4456c5b90da757acd9420d06697
- https://git.kernel.org/stable/c/d97dba9ff13987d1fc415408557a54adde980311
- https://github.com/advisories/GHSA-9w62-w855-8959
- https://nvd.nist.gov/vuln/detail/CVE-2026-99219
- https://git.kernel.org/stable/c/e1f339ff3b83857b93baf8b88186275a413d445e