8.4 HIGH
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Local (L)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): High (H)
- Integrity (I): High (H)
- Availability (A): High (H)
- Modified Attack Vector (MAV): Local (L)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): None (N)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): High (H)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): High (H)
- Modified Availability (MA): High (H)
Activity log
- Created & dismissed (max. allowed matches exceeded) suggestion
qed: fix double free in qed_cxt_tables_alloc()
In the Linux kernel, the following vulnerability has been resolved: qed: fix double free in qed_cxt_tables_alloc() If one of the later PF or VF CID bitmap allocations fails, qed_cid_map_alloc() jumps to cid_map_fail and frees the previously allocated CID bitmaps before returning an error. qed_cxt_tables_alloc() then calls qed_cxt_mngr_free(), which invokes qed_cid_map_free() again. Fix this by setting each CID bitmap pointer to NULL after bitmap_free() to avoid double free. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1-rc3. Runtime reproduction was not attempted because exercising the failing allocation path requires device-specific setup.
References
Affected products
- <2bccfb8476ca5f3548afbd623dc7a6980d4e77de
- =<5.10.*
- ==4.4
- =<6.18.*
- <0e47fc1c9181ae029e0e35a865cbf2adcbae626c
- =<7.0.*
- <06fa8e69019fd3c41a7b0ea8c5f509c3a33dc227
- =<5.15.*
- <4.4
- <9fe030719bd083b766602692ee96c8c985798e3c
- <3904b993cc17ec5d7c5d3b57dbd0b775dafb9684
- =<6.12.*
- =<6.1.*
- <8cf5e4d2ca6b101d163c7423a426fb0aec34f7bb
- =<6.6.*
- =<*
- <bdf678a273cadbccc347f331ae2e93ff4d14834c
- <a04c207f0801abdd23a169b5f902a9845059a65a