Answer in brief
CVE-2026-80928 records a High severity (CVSS 7.8) vulnerability in smack: fix cred UAF in smack_file_send_sigiotask(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b5bcf3adfa27279da4401ab8f1e1a706601a92be || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ed64aa505875a3b4defd504ee8e59e1949246a62 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b791401bf389a1546a830d2b381ca60fe94c7870 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fedc88e38ce979a720cd2de042578cb5df3dc8de || >=0 <6.12.109 || >=0 <6.18.50 || >=0 <7.2.4 | b5bcf3adfa27279da4401ab8f1e1a706601a92be, ed64aa505875a3b4defd504ee8e59e1949246a62, b791401bf389a1546a830d2b381ca60fe94c7870, fedc88e38ce979a720cd2de042578cb5df3dc8de, 6.12.109, 6.18.50, 7.2.4 |
| Linux/Linuxgeneric | >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <b5bcf3adfa27279da4401ab8f1e1a706601a92be || >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <ed64aa505875a3b4defd504ee8e59e1949246a62 || >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <b791401bf389a1546a830d2b381ca60fe94c7870 || >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <fedc88e38ce979a720cd2de042578cb5df3dc8de | b5bcf3adfa27279da4401ab8f1e1a706601a92be, ed64aa505875a3b4defd504ee8e59e1949246a62, b791401bf389a1546a830d2b381ca60fe94c7870, fedc88e38ce979a720cd2de042578cb5df3dc8de |
| Linux/Linuxgeneric | 2.6.29 | Not reported |
| Linux/Linuxgeneric | >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <a512366d84e134a9eefc2cc40eeb6e80e2ec162c || >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <7c7fe043f3099d0d35002b248967f75e55345b93 || >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <f9c7b1f2b9d8f4176d2632743f51400855978ace || >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <b5bcf3adfa27279da4401ab8f1e1a706601a92be || >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <ed64aa505875a3b4defd504ee8e59e1949246a62 || >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <b791401bf389a1546a830d2b381ca60fe94c7870 || >=3b11a1decef07c19443d24ae926982bc8ec9f4c0 <fedc88e38ce979a720cd2de042578cb5df3dc8de | a512366d84e134a9eefc2cc40eeb6e80e2ec162c, 7c7fe043f3099d0d35002b248967f75e55345b93, f9c7b1f2b9d8f4176d2632743f51400855978ace, b5bcf3adfa27279da4401ab8f1e1a706601a92be, ed64aa505875a3b4defd504ee8e59e1949246a62, b791401bf389a1546a830d2b381ca60fe94c7870, fedc88e38ce979a720cd2de042578cb5df3dc8de |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: smack: fix cred UAF in smack_file_send_sigiotask() When inspecting the credentials of another task, objective credentials (->real_cred, accessed with __task_cred()) must always be used. Accessing ->cred on a non-current task is forbidden unless that task is being created or destroyed; a task is allowed to change its own ->cred pointer with no synchronization, and changing ->cred should only affect the current syscall. smack_file_send_sigiotask() was accessing both sets of credentials: First tsk->cred, then __task_cred(tsk). Fix it, always access the objective credentials here. I have tested that this bug can lead to a KASAN-reported UAF of struct cred in smack_file_send_sigiotask(), and that this fix prevents the race.
Quoted source text, attributed separately from HOL analysis.