nasa/cFE

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The Core Flight System (cFS) Core Flight Executive (cFE)

Stars: 521
Forks: 264
Open beginner issues: 0
Indexed issues: 387
Avg merge: 3d 32m
Merged PRs (30d): 21

Dominant language: C
License: Apache-2.0
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

Open All

387 open issues indexed

Convert table dump to use FS background file facility Open

Difficulty 3/5 1-2 days Newbie friendliness 67/100

nasa/cFE#2858 · 1 comment · Opened Sep 18, 2026
cFE Unused type declarations Open

nasa/cFE#2855 · 1 assignee · Opened Sep 16, 2026
CFE_TBL Dump command event message incorrect Open

nasa/cFE#2847 · 1 assignee · Opened Sep 14, 2026
CFE_EVS_SendHkCmd only clears the first unused AppData slot in the housekeeping packet Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

nasa/cFE#2836 · Opened Sep 6, 2026
CFE_ES_PoolCreateEx bounds check uses wrong constant (MISSION vs PLATFORM) Open

Difficulty 1/5 Under an hour Newbie friendliness 92/100

nasa/cFE#2828 · Opened Sep 3, 2026
Separate increment operator in CFE_MSG_ComputeCheckSum() in modules/msg/fsw/src/cfe_msg_sechdr_checksum.c Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

nasa/cFE#2824 · Opened Sep 1, 2026
[SECURITY] CFE_MSG_ComputeCheckSum() buffer over-read via wire Length field (SC ATS path) Open

nasa/cFE#2810 · 1 assignee · Opened Aug 25, 2026
Create Pull Request/Commit Guide Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

nasa/cFE#2788 · Opened Aug 3, 2026
cFE Time Print Inconsistency with 32-bit Builds Open

Difficulty 4/5 3-5 days Newbie friendliness 50/100

nasa/cFE#2782 · Opened Jul 20, 2026
cFE TIME cfe_time_dispatch.c compilation error when configured as a client Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

nasa/cFE#2781 · Opened Jul 20, 2026
Add QUERY_TASK_AFFINITY command to TA CFE module Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

nasa/cFE#2777 · Opened Jul 14, 2026
Feature Request: UtAssert_UINT64_EQ Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

nasa/cFE#2776 · Opened Jul 10, 2026
Replace unsafe strcmp() usage with bounded string comparison functions Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

nasa/cFE#2738 · 1 reaction · Opened May 20, 2026
Update TBL Design Documentation Open

docs

nasa/cFE#2721 · 1 assignee · Opened May 13, 2026
Integer overflow in cfe_tbl_load.c Open

bug security

Difficulty 4/5 3-5 days Newbie friendliness 55/100

nasa/cFE#2707 · 2 comments · Opened May 8, 2026
[SECURITY] Unbounded loop on attacker-controlled CCSDS Length in CFE_MSG_ComputeCheckSum enables OOB read on every checksum validation Open

security

Difficulty 4/5 3-5 days Newbie friendliness 45/100

nasa/cFE#2699 · 1 comment · Opened Apr 26, 2026
[SECURITY] Missing lower-bound validation on CCSDS Length field in SB transmit path enables 32 KiB heap exfiltration via 8-byte UDP datagram (TO_LAB downlink) Open

bug security

Difficulty 4/5 3-5 days Newbie friendliness 42/100

nasa/cFE#2698 · 4 comments · Opened Apr 26, 2026
[SECURITY] Unsigned integer underflow in CFE_SB_GetUserDataLength returns SIZE_MAX-class value for malformed messages, enabling OOB read in downstream consumers Open

bug cFE-SB security

Difficulty 3/5 1-2 days Newbie friendliness 68/100

nasa/cFE#2697 · 2 comments · Opened Apr 26, 2026
cFS DoS via Unvalidated AppEntryPoint in CFE_ES_START_APP_CC Command Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 48/100

nasa/cFE#2684 · Opened Mar 9, 2026
Security Hardening: GitHub Actions Input Handling + Pointer-Size Safety Cleanup Open

github_actions security

Difficulty 5/5 Over a week Newbie friendliness 30/100

nasa/cFE#2680 · 1 comment · Opened Feb 10, 2026
Narrowing conversion warning for CFE_ResourceId_FromInteger Open

bug

nasa/cFE#2664 · 1 assignee · Opened Sep 18, 2025
Unregistered AppId error with CFE_EVS_SendEventWithAppID() during cFE task startup Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

nasa/cFE#2663 · 2 comments · Opened Aug 6, 2025
ways to override get_version per dep Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

nasa/cFE#2662 · Opened Jul 21, 2025
coverage-es-ALL-testrunner SegFault with Ubuntu 24.04 (Noble) and gcc 3.13.0 Open

CCB:Ignore CCB:Tracked-Internally

Difficulty 2/5 1-3 hours Newbie friendliness 52/100

nasa/cFE#2659 · 1 reaction · Opened Jun 19, 2025
`CFE_TIME_ToneSendGPS` and `CFE_TIME_ToneSendTime` are almost identical Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 48/100

nasa/cFE#2657 · Opened Jun 17, 2025
Performance Log Dump has dead writes to FS Metadata and only writes 1 entry at a time Open

bug cFE-ES

Difficulty 4/5 3-5 days Newbie friendliness 48/100

nasa/cFE#2653 · Opened May 22, 2025
Address Sanitizer flags a test in fs_UT.c as having a READ buffer overflow Open

bug unit-test

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

nasa/cFE#2650 · Opened May 6, 2025
CFE_TBL_DUMP_CC can overwrite .so in /cf/ Open

bug

nasa/cFE#2640 · 1 comment · 1 assignee · Opened Feb 23, 2025
Implicit type conversion in CFE_ES_PerfLogAdd()) Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 55/100

nasa/cFE#2638 · Opened Feb 20, 2025
Invalid MetaData in CFE_es_perf Open

bug

Difficulty 1/5 Under an hour Newbie friendliness 48/100

nasa/cFE#2637 · Opened Feb 18, 2025
equuleus-rc1 User's Guide is missing on github. Open

docs

nasa/cFE#2634 · 1 assignee · Opened Jan 28, 2025
TBL verify check for CFE_PLATFORM_TBL_MAX_SNGL_TABLE_SIZE does not match documented description Open

good first issue

Difficulty 1/5 Under an hour Newbie friendliness 48/100

nasa/cFE#2627 · 3 comments · Opened Jan 14, 2025
Split up `CFE_TBL_Load()` and remove early returns Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

nasa/cFE#2588 · Opened Aug 9, 2024
CFE_SB_ReceiveBuffer times out immediately if the system time changes on POSIX Open

bug docs

Difficulty 4/5 3-5 days Newbie friendliness 45/100

nasa/cFE#2574 · 2 comments · Opened Jul 3, 2024
CFE_EVS_MAX_PORT_MSG_LENGTH size reduction requires clarity Open

enhancement good first issue

Difficulty 2/5 1-3 hours Newbie friendliness 72/100

nasa/cFE#2571 · 1 comment · Opened Jun 27, 2024
Generic Pool fail for SC when a higher number of tables are registered Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

nasa/cFE#2567 · Opened May 27, 2024
SB memory pool misleading reporting and ES API confusing Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

nasa/cFE#2558 · 1 comment · Opened May 9, 2024
Remove conditionally-compiled code in TBL Open

enhancement

nasa/cFE#2545 · 3 comments · 1 assignee · Opened Apr 4, 2024
TBL: consolidate repeated logic blocks Open

enhancement

nasa/cFE#2532 · 1 assignee · Opened Mar 21, 2024
TBL main task blocked for duration of CFE_TBL_DumpToFile call Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 42/100

nasa/cFE#2528 · Opened Mar 12, 2024
Add encode/decode hooks for TBL services load/dump routines Open

enhancement

nasa/cFE#2521 · 1 assignee · Opened Feb 27, 2024
EVS event messages - add (optional!) stack traces Open

cFE-EVS good first issue

nasa/cFE#2513 · 1 assignee · Opened Feb 12, 2024
Implementation assumptions in table functional test Open

enhancement

nasa/cFE#2506 · 1 comment · 1 assignee · Opened Jan 29, 2024
Out-of-order CC usage Open

enhancement

Difficulty 1/5 Under an hour Newbie friendliness 68/100

nasa/cFE#2501 · Opened Jan 22, 2024
`OMIT_DEPRECATED` dependency on submodule defines undesirable Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

nasa/cFE#2492 · Opened Jan 5, 2024
Possible NULL ptr deference in CFE_ES_StartAppTask Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 48/100

nasa/cFE#2491 · 1 comment · Opened Jan 5, 2024
Document how to change CFE_TIME_Print() timestamp format Open

enhancement

Difficulty 1/5 Under an hour Newbie friendliness 50/100

nasa/cFE#2490 · Opened Jan 4, 2024
Perfids default file missing Open

build-system

Difficulty 4/5 3-5 days Newbie friendliness 38/100

nasa/cFE#2487 · Opened Dec 19, 2023
Several `switch` statements in cFE are missing a `default` and/or `break` Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

nasa/cFE#2478 · Opened Dec 8, 2023
Need appropriate method(s) to fabricate valid MsgIds Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 45/100

nasa/cFE#2476 · Opened Dec 7, 2023

nasa/cFE

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