# CVE-2022-49784: linux: In the Linux kernel, the following vulnerability has been resolved:  perf/x86/amd/uncore: Fix memory leak for events...

CVE-2022-49784 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49784, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49784
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  perf/x86/amd/uncore: Fix memory leak for events array  When a CPU comes online, the per-CPU NB and LLC uncore contexts are freed but not the events array within the context structure. This causes a memory leak as identified by the kmemleak detector.    [...]   unreferenced object 0xffff8c5944b8e320 (size 32):     comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s)     hex dump (first 32 bytes):       00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................       00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................     backtrace:       [<000000000759fb79>] amd_uncore_cpu_up_prepare+0xaf/0x230       [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470       [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170       [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330       [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110       [<0000000015365e0f>] amd_uncore_init+0x260/0x321       [<00000000089152d2>] do_one_initcall+0x3f/0x1f0       [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212       [<0000000030be8dde>] kernel_init+0x11/0x120       [<0000000059709e59>] ret_from_fork+0x22/0x30   unreferenced object 0xffff8c5944b8dd40 (size 64):     comm "swapper/0", pid 1, jiffies 4294670387 (age 151.072s)     hex dump (first 32 bytes):       00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................       00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................     backtrace:       [<00000000306efe8b>] amd_uncore_cpu_up_prepare+0x183/0x230       [<00000000ddc9e126>] cpuhp_invoke_callback+0x2cf/0x470       [<0000000093e727d4>] cpuhp_issue_call+0x14d/0x170       [<0000000045464d54>] __cpuhp_setup_state_cpuslocked+0x11e/0x330       [<0000000069f67cbd>] __cpuhp_setup_state+0x6b/0x110       [<0000000015365e0f>] amd_uncore_init+0x260/0x321       [<00000000089152d2>] do_one_initcall+0x3f/0x1f0       [<000000002d0bd18d>] kernel_init_freeable+0x1ca/0x212       [<0000000030be8dde>] kernel_init+0x11/0x120       [<0000000059709e59>] ret_from_fork+0x22/0x30   [...]  Fix the problem by freeing the events array before freeing the uncore context.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.10-1 | [DEBIAN-CVE-2022-49784](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49784.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.10-1 | [DEBIAN-CVE-2022-49784](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49784.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.10-1 | [DEBIAN-CVE-2022-49784](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49784.md) | May 1, 2025 |

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