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CVE-2023-6915 is a NULL pointer dereference in the Linux kernel's ida_free function in lib/idr.c. When xas_load returns NULL, ida_free assigns NULL to bitmap. The xa_is_value(bitmap) condition then fails and execution reaches an else branch that evaluates test_bit(bit, bitmap->bitmap), dereferencing the NULL bitmap pointer. The flaw results from missing validation of a function return value.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel null-pointer dereference in ida_free within lib/idr.c that can allow a local, low-privileged attacker to cause a denial of service.
Vulnerability addressed by the AlmaLinux 9.2 TuxCare advisory.
A vulnerability included in the TuxCare AlmaLinux 9.2 kernel security update advisory.
Linux kernel NULL pointer dereference in ida_free().
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.