CVE-2022-49410
In the Linux kernel, the following vulnerability has been resolved: tracing: Fix potential double free in create_var_ref() In create_var_ref(), init_var_ref() is called to initialize the fields of variable ref_field, which is allocated in the previous…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.30%). 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: tracing: Fix potential double free in create_var_ref() In create_var_ref(), init_var_ref() is called to initialize the fields of variable ref_field, which is allocated in the previous function call to create_hist_field(). Function init_var_ref() allocates the corresponding fields such as ref_field->system, but frees these fields when the function encounters an error. The caller later calls destroy_hist_field() to conduct error handling, which frees the fields and the variable itself. This results in double free of the fields which are already freed in the previous function. Fix this by storing NULL to the corresponding fields when they are freed in init_var_ref().
- 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
- 0.30% probability · 22th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/058cb6d86b9789377216c936506b346aaa1eb581Patch
- https://git.kernel.org/stable/c/37443b3508b8cce6832f8d25cb4550b2f7801f50Patch
- https://git.kernel.org/stable/c/4fdfb15e08598711dbf50daf56a33965232daf0ePatch
- https://git.kernel.org/stable/c/99696a2592bca641eb88cc9a80c90e591afebd0fPatch
- https://git.kernel.org/stable/c/bd83ff3bbfb003832481c9bff999d12385f396aePatch
- https://git.kernel.org/stable/c/c27f744ceefadc7bbeb14233b6abc150ced617d2Patch
- https://git.kernel.org/stable/c/f8b383f83cb573152c577eca1ef101e89995b72aPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.