high CVSS 7.8

CVE-2020-36785·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: media: atomisp: Fix use after free in atomisp_alloc_css_stat_bufs() The "s3a_buf" is freed along with all the other items on the "asd->s3a_stats" list. It leads to a double free and a use after free.

Severity
high
Software
Kernel
Fixed in
5.12.4
Published
2024-02-28

Affected versions

From: 5.12

Until: 5.12.4

Fixed in: 5.12.4

How to fix this CVE

Update your Linux kernel to version 5.12.4 or later to resolve this memory management vulnerability affecting the Intel Atom ISP camera driver. The vulnerability causes a double-free condition when statistical buffers are improperly freed during device initialization. Apply the kernel update through your system's package manager and reboot to activate the patched version.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Check your kernel version with: uname -r — it should be 5.12.4 or higher; versions 5.12 through 5.12.3 are vulnerable
  2. Verify if the atomisp camera driver is loaded: lsmod | grep atomisp — if present, the component is active on your system
  3. Search kernel logs for memory corruption indicators: sudo dmesg | grep -i 'double free\|use after free\|atomisp' — look for warnings or kernel panics
  4. Confirm the fix is applied by checking: cat /proc/version — ensure the kernel version matches or exceeds 5.12.4

FAQ

What is CVE-2020-36785?

CVE-2020-36785 is a memory safety vulnerability in the Linux kernel's Intel Atom ISP (camera) driver where statistical buffer pointers are freed twice during initialization, potentially leading to kernel memory corruption and system instability.

Is CVE-2020-36785 being actively exploited?

No, this vulnerability is not listed on the CISA Known Exploited Vulnerabilities catalog and has no public exploits available. However, it poses a high local privilege escalation risk for users with system access.

What versions of Kernel are affected by CVE-2020-36785?

Linux kernel versions 5.12 through 5.12.3 are vulnerable. The fix was released in kernel version 5.12.4 and later.

How do I check if my server is vulnerable to CVE-2020-36785?

Run uname -r to display your kernel version. If it shows 5.12.0 through 5.12.3, your system is vulnerable and requires immediate patching.

Does Defensia detect CVE-2020-36785?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Kernel is installed on a monitored server, CVE-2020-36785 will appear in your dashboard with remediation steps.

Related Kernel CVEs

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CVE-2024-38623CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Use variable length array instead of fixed size Should fix smatch warning: ntfs_set_label() error: __builtin_memcpy() 'uni->name' too small (20 vs 256)
CVE-2024-36031CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: keys: Fix overwrite of key expiration on instantiation The expiry time of a key is unconditionally overwritten during instantiation, defaulting to turn it permanent. This causes a problem for DNS resolution as the expiration set by user-space is overwritten to TIME64_MAX, disabling further DNS updates. Fix this by restoring the condition that key_set_expiry is only called when the pre-parser sets a specific expiry.
CVE-2021-47548CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port() The if statement: if (port >= DSAF_GE_NUM) return; limits the value of port less than DSAF_GE_NUM (i.e., 8). However, if the value of port is 6 or 7, an array overflow could occur: port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off; because the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6). To fix this possible array overflow, we first check port and if it is greater than or equal to DSAF_MAX_PORT_NUM, the function returns.
CVE-2022-48716CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: wcd938x: fix incorrect used of portid Mixer controls have the channel id in mixer->reg, which is not same as port id. port id should be derived from chan_info array. So fix this. Without this, its possible that we could corrupt struct wcd938x_sdw_priv by accessing port_map array out of range with channel id instead of port id.

References

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