| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| In the Linux kernel, the following vulnerability has been resolved:
keys: Avoid the owner account dereference in named keyring lookup
Named keyring lookup must keep the storage containing the owner UID
alive through the namespace mapping check. find_keyring_by_name()
reads keyring->user->uid under keyring_name_lock, but that lock protects
the keyring's name entry and allocation, not its separate key_user.
A named session-keyring join can overlap a privileged KEYCTL_CHOWN on
another CPU. If the keyring holds the last reference to its old dynamic
key_user and the ownership transfer succeeds, the following ordering is
possible:
Named join Chown
find_keyring_by_name() keyctl_chown_key()
read_lock(keyring_name_lock) down_write(key->sem)
load old keyring->user
replace key->user and key->uid
up_write(key->sem)
key_put(key)
key_user_put(old user): free
read old user->uid
read_unlock(keyring_name_lock)
Chown neither takes keyring_name_lock nor key_session_mutex, so it can
free the old account between the pointer load and the UID read. The
lookup then reads freed memory even though the keyring itself is alive.
Use keyring->uid for the mapping check. key_alloc() initializes this
inline owner UID and keyctl_chown_key() updates it on chown.
The existing name lock keeps its containing keyring allocated throughout
the check, so lookup no longer depends on the account's lifetime. This
also matches the owner UID used by the permission check.
KASAN report as below:
BUG: KASAN: slab-use-after-free in find_keyring_by_name+0x577/0x5d0
Read of size 4 at addr ffff8881128ae2ec by task keycase/500 |
| Missing authorization in Accessibility in Google Chrome prior to 156.0.8078.47 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium) |
| SQLite before 3.54.0 built with FTS3/FTS4 and SQLITE_ENABLE_FTS3_PARENTHESIS contains a use-after-free vulnerability in fts3BestSnippet() caused by dangling cached position-list pointers. Attackers can run a full-text MATCH query combining OR and NEAR operators with snippet() to read freed heap memory and crash the process. |
| Use after free in Canvas in Google Chrome on Linux, ChromeOS prior to 147.0.7727.138 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: Critical) |
| Incorrect authorization in FileSystem in Google Chrome prior to 156.0.8078.79 allowed a remote attacker leveraging social engineering to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High) |
| Uninitialized resource in Skia in Google Chrome prior to 156.0.8078.79 allowed a remote attacker who had compromised the renderer process to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: High) |
| Incorrect authorization in Blink in Google Chrome prior to 156.0.8078.79 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: High) |
| Improper state validation in Performance in Google Chrome prior to 156.0.8078.47 allowed a local attacker to read memory via a local program. (Chromium security severity: Medium) |
| Uninitialized resource in GPU in Google Chrome prior to 156.0.8078.47 allowed a remote attacker who had compromised the renderer process to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: High) |
| UI misrepresentation in Chrome for iOS in Google Chrome on on iOS prior to 156.0.8078.47 allowed a remote attacker to spoof UI elements via a crafted HTML page. (Chromium security severity: Low) |
| Missing authorization in Extensions in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to obtain cross-origin data via a crafted Chrome extension. (Chromium security severity: Medium) |
| Observable discrepancy in Media in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially leak cross-origin data via a crafted HTML page. (Chromium security severity: Low) |
| UI misrepresentation in Extensions in Google Chrome prior to 156.0.8078.47 allowed a remote attacker leveraging social engineering to spoof UI elements via a crafted Chrome extension. (Chromium security severity: Medium) |
| Cross-site scripting in ReadingMode in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to spoof UI elements via a crafted HTML page. (Chromium security severity: Low) |
| Improper privilege management in Permissions in Google Chrome prior to 156.0.8078.47 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Low) |
| Integer overflow in ANGLE in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium) |
| Use of released resource in Navigation in Google Chrome prior to 156.0.8078.47 allowed a remote attacker who had compromised the renderer process to spoof UI elements via a crafted HTML page. (Chromium security severity: Medium) |
| Incorrect authorization in SiteIsolation in Google Chrome on on Android prior to 156.0.8078.47 allowed a remote attacker to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium) |
| Observable discrepancy in CSS in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to obtain sensitive information via a crafted HTML page. (Chromium security severity: Medium) |
| Inappropriate implementation in Core in Google Chrome on on Mac prior to 156.0.8078.47 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium) |
