LoongArch: BPF: Fix off-by-one error in build_prologue()
Summary
| CVE | CVE-2025-37893 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-04-18 07:15:42 UTC |
| Updated | 2026-07-30 06:22:29 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 5.5 MEDIUM from [email protected]
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Problem Types: CWE-193 | CWE-193 CWE-193 Off-by-one Error
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | ADP | DECLARED | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | Secondary | 5.5 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Linux | Linux Kernel | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 5dc615520c4dfb358245680f1904bad61116648e b3ffad2f02db4aace6799fe0049508b8925eae45 git | Not specified |
| CNA | Linux | Linux | affected 5dc615520c4dfb358245680f1904bad61116648e 205a2182c51ffebaef54d643e3745e720cded08b git | Not specified |
| CNA | Linux | Linux | affected 5dc615520c4dfb358245680f1904bad61116648e c74d95a5679741ef428974ab788f5b0758dc78ae git | Not specified |
| CNA | Linux | Linux | affected 5dc615520c4dfb358245680f1904bad61116648e 48b904de2408af5f936f0e03f48dfcddeab58aa0 git | Not specified |
| CNA | Linux | Linux | affected 5dc615520c4dfb358245680f1904bad61116648e 7e2586991e36663c9bc48c828b83eab180ad30a9 git | Not specified |
| CNA | Linux | Linux | affected 6.1 | Not specified |
| CNA | Linux | Linux | unaffected 6.1 semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.87 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.23 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.13.11 6.13.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.14.2 6.14.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.15 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/48b904de2408af5f936f0e03f48dfcddeab58aa0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/c74d95a5679741ef428974ab788f5b0758dc78ae | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/b3ffad2f02db4aace6799fe0049508b8925eae45 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/7e2586991e36663c9bc48c828b83eab180ad30a9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| git.kernel.org/stable/c/205a2182c51ffebaef54d643e3745e720cded08b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | Patch |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.