CVE-2025-37893 (GCVE-0-2025-37893)

Vulnerability from cvelistv5 – Published: 2025-04-18 07:01 – Updated: 2025-10-01 16:14
VLAI?
Title
LoongArch: BPF: Fix off-by-one error in build_prologue()
Summary
In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Fix off-by-one error in build_prologue() Vincent reported that running BPF progs with tailcalls on LoongArch causes kernel hard lockup. Debugging the issues shows that the JITed image missing a jirl instruction at the end of the epilogue. There are two passes in JIT compiling, the first pass set the flags and the second pass generates JIT code based on those flags. With BPF progs mixing bpf2bpf and tailcalls, build_prologue() generates N insns in the first pass and then generates N+1 insns in the second pass. This makes epilogue_offset off by one and we will jump to some unexpected insn and cause lockup. Fix this by inserting a nop insn.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5dc615520c4dfb358245680f1904bad61116648e , < b3ffad2f02db4aace6799fe0049508b8925eae45 (git)
Affected: 5dc615520c4dfb358245680f1904bad61116648e , < 205a2182c51ffebaef54d643e3745e720cded08b (git)
Affected: 5dc615520c4dfb358245680f1904bad61116648e , < c74d95a5679741ef428974ab788f5b0758dc78ae (git)
Affected: 5dc615520c4dfb358245680f1904bad61116648e , < 48b904de2408af5f936f0e03f48dfcddeab58aa0 (git)
Affected: 5dc615520c4dfb358245680f1904bad61116648e , < 7e2586991e36663c9bc48c828b83eab180ad30a9 (git)
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    Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.6.87 , ≤ 6.6.* (semver)
Unaffected: 6.12.23 , ≤ 6.12.* (semver)
Unaffected: 6.13.11 , ≤ 6.13.* (semver)
Unaffected: 6.14.2 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • 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.



Detection rules are retrieved from Rulezet.