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CVE-2024-43890

tracing: Fix overflow in get_free_elt()

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.19.320, 5.4.282, 5.10.224, 5.15.165, 6.1.105, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix overflow in get_free_elt() "tracing_map->next_elt" in get_free_elt() is at risk of overflowing. Once it overflows, new elements can still be inserted into the tracing_map even though the maximum number of elements (`max_elts`) has been reached. Continuing to insert elements after the overflow could result in the tracing_map containing "tracing_map->max_size" elements, leaving no empty entries. If any attempt is made to insert an element into a full tracing_map using `__tracing_map_insert()`, it will cause an infinite loop with preemption disabled, leading to a CPU hang problem. Fix this by preventing any further increments to "tracing_map->next_elt" once it reaches "tracing_map->max_elt".

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From 08d43a5fa063e03c860f2f391a30c388bcbc948e · fixed in 302ceb625d7b990db205a15e371f9a71238de91c; From 08d43a5fa063e03c860f2f391a30c388bcbc948e · fixed in d3e4dbc2858fe85d1dbd2e72a9fc5dea988b5c18; From 08d43a5fa063e03c860f2f391a30c388bcbc948e · fixed in eb223bf01e688dfe37e813c8988ee11c8c9f8d0a; From 08d43a5fa063e03c860f2f391a30c388bcbc948e · fixed in cd10d186a5409a1fe6e976df82858e9773a698da; From 08d43a5fa063e03c860f2f391a30c388bcbc948e · fixed in 788ea62499b3c18541fd6d621964d8fafbc4aec5; From 08d43a5fa063e03c860f2f391a30c388bcbc948e · fixed in a172c7b22bc2feaf489cfc6d6865f7237134fdf8; From 08d43a5fa063e03c860f2f391a30c388bcbc948e · fixed in 236bb4690773ab6869b40bedc7bc8d889e36f9d6; From 08d43a5fa063e03c860f2f391a30c388bcbc948e · fixed in bcf86c01ca4676316557dd482c8416ece8c2e143

  • Linux Linux

    4.7

  • KernelLinux

    From 4.7.0 · fixed in 4.19.320; From 4.20.0 · fixed in 5.4.282; From 5.5.0 · fixed in 5.10.224; From 5.11.0 · fixed in 5.15.165; From 5.16.0 · fixed in 6.1.105; From 6.2.0 · fixed in 6.6.46; From 6.7.0 · fixed in 6.10.5

References 8

git.kernel.org