CVE-2024-49850 (GCVE-0-2024-49850)

Vulnerability from cvelistv5 – Published: 2024-10-21 12:18 – Updated: 2025-11-03 22:22
VLAI?
Title
bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: correctly handle malformed BPF_CORE_TYPE_ID_LOCAL relos In case of malformed relocation record of kind BPF_CORE_TYPE_ID_LOCAL referencing a non-existing BTF type, function bpf_core_calc_relo_insn would cause a null pointer deference. Fix this by adding a proper check upper in call stack, as malformed relocation records could be passed from user space. Simplest reproducer is a program: r0 = 0 exit With a single relocation record: .insn_off = 0, /* patch first instruction */ .type_id = 100500, /* this type id does not exist */ .access_str_off = 6, /* offset of string "0" */ .kind = BPF_CORE_TYPE_ID_LOCAL, See the link for original reproducer or next commit for a test case.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 74753e1462e77349525daf9eb60ea21ed92d3a97 , < dc7ce14f00bcd50641f2110b7a32aa6552e0780f (git)
Affected: 74753e1462e77349525daf9eb60ea21ed92d3a97 , < 2288b54b96dcb55bedebcef3572bb8821fc5e708 (git)
Affected: 74753e1462e77349525daf9eb60ea21ed92d3a97 , < 584cd3ff792e1edbea20b2a7df55897159b0be3e (git)
Affected: 74753e1462e77349525daf9eb60ea21ed92d3a97 , < e7e9c5b2dda29067332df2a85b0141a92b41f218 (git)
Affected: 74753e1462e77349525daf9eb60ea21ed92d3a97 , < 3d2786d65aaa954ebd3fcc033ada433e10da21c4 (git)
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    Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.54 , ≤ 6.6.* (semver)
Unaffected: 6.10.13 , ≤ 6.10.* (semver)
Unaffected: 6.11.2 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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