Answer in brief
CVE-2026-53273 records a High severity (CVSS 7.8) vulnerability in tee: optee: prevent use-after-free when the client exits before the supplicant. The current sources do not mark it as known exploited. The current feed maps 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.
Answer in brief
CVE-2026-53273 records a High severity (CVSS 7.8) vulnerability in tee: optee: prevent use-after-free when the client exits before the supplicant. The current sources do not mark it as known exploited. The current feed maps 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0180cf0373f84fff61b16f8c062553a13dd7cfca <416259cb5bffecaaae5f76539deb535a8c1b2c34 || >=c0a9a948159153be145f9471435695373904ee6d <724d0caffd4204b46f78efe22f18f8338031c6e1 || >=ec18520f5edc20a00c34a8c9fdd6507c355e880f <ae847ab29ded2d7cece4d5970f0edefa4137bf2f || >=d61cc1a435e6894bfb0dd3370c6f765d2d12825d <9a0dc9279d0907b198f205a693aedf696b08145d || >=fd9d2d6124c293e40797a080adf8a9c237efd8b8 <d366a01475f927402c96a3fe78bfc06b924fc87d || >=70b0d6b0a199c5a3ee6c72f5e61681ed6f759612 <d5b57bb314d79e99bebb58a53588fa11dd4dbf69 || >=70b0d6b0a199c5a3ee6c72f5e61681ed6f759612 <373152c94e57e9592b68c100e224fbd943cfd608 || >=70b0d6b0a199c5a3ee6c72f5e61681ed6f759612 <387a926ee166814611acecb960207fe2f3c4fd3e || 3eb4911364c764572e9db4ab900a57689a54e8ce || 21234efe2a8474a6d2d01ea9573319de7858ce44 || >=5.10.235 <5.10.259 || >=5.15.179 <5.15.210 || >=6.1.130 <6.1.176 || >=6.6.80 <6.6.143 || >=6.12.17 <6.12.94 || >=5.4.291 <5.5 || >=6.13.5 <6.14 | 416259cb5bffecaaae5f76539deb535a8c1b2c34, 724d0caffd4204b46f78efe22f18f8338031c6e1, ae847ab29ded2d7cece4d5970f0edefa4137bf2f, 9a0dc9279d0907b198f205a693aedf696b08145d, d366a01475f927402c96a3fe78bfc06b924fc87d, d5b57bb314d79e99bebb58a53588fa11dd4dbf69, 373152c94e57e9592b68c100e224fbd943cfd608, 387a926ee166814611acecb960207fe2f3c4fd3e, 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 5.5, 6.14 |
| Linux/Linuxgeneric | 6.14 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: tee: optee: prevent use-after-free when the client exits before the supplicant Commit 70b0d6b0a199 ("tee: optee: Fix supplicant wait loop") made the client wait as killable so it can be interrupted during shutdown or after a supplicant crash. This changes the original lifetime expectations: the client task can now terminate while the supplicant is still processing its request. If the client exits first it removes the request from its queue and kfree()s it, while the request ID remains in supp->idr. A subsequent lookup on the supplicant path then dereferences freed memory, leading to a use-after-free. Serialise access to the request with supp->mutex: * Hold supp->mutex in optee_supp_recv() and optee_supp_send() while looking up and touching the request. * Let optee_supp_thrd_req() notice that the client has terminated and signal optee_supp_send() accordingly. With these changes the request cannot be freed while the supplicant still has a reference, eliminating the race.
Quoted source text, attributed separately from HOL analysis.
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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0180cf0373f84fff61b16f8c062553a13dd7cfca <416259cb5bffecaaae5f76539deb535a8c1b2c34 || >=c0a9a948159153be145f9471435695373904ee6d <724d0caffd4204b46f78efe22f18f8338031c6e1 || >=ec18520f5edc20a00c34a8c9fdd6507c355e880f <ae847ab29ded2d7cece4d5970f0edefa4137bf2f || >=d61cc1a435e6894bfb0dd3370c6f765d2d12825d <9a0dc9279d0907b198f205a693aedf696b08145d || >=fd9d2d6124c293e40797a080adf8a9c237efd8b8 <d366a01475f927402c96a3fe78bfc06b924fc87d || >=70b0d6b0a199c5a3ee6c72f5e61681ed6f759612 <d5b57bb314d79e99bebb58a53588fa11dd4dbf69 || >=70b0d6b0a199c5a3ee6c72f5e61681ed6f759612 <373152c94e57e9592b68c100e224fbd943cfd608 || >=70b0d6b0a199c5a3ee6c72f5e61681ed6f759612 <387a926ee166814611acecb960207fe2f3c4fd3e || 3eb4911364c764572e9db4ab900a57689a54e8ce || 21234efe2a8474a6d2d01ea9573319de7858ce44 || >=5.10.235 <5.10.259 || >=5.15.179 <5.15.210 || >=6.1.130 <6.1.176 || >=6.6.80 <6.6.143 || >=6.12.17 <6.12.94 || >=5.4.291 <5.5 || >=6.13.5 <6.14 | 416259cb5bffecaaae5f76539deb535a8c1b2c34, 724d0caffd4204b46f78efe22f18f8338031c6e1, ae847ab29ded2d7cece4d5970f0edefa4137bf2f, 9a0dc9279d0907b198f205a693aedf696b08145d, d366a01475f927402c96a3fe78bfc06b924fc87d, d5b57bb314d79e99bebb58a53588fa11dd4dbf69, 373152c94e57e9592b68c100e224fbd943cfd608, 387a926ee166814611acecb960207fe2f3c4fd3e, 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 5.5, 6.14 |
| Linux/Linuxgeneric | 6.14 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: tee: optee: prevent use-after-free when the client exits before the supplicant Commit 70b0d6b0a199 ("tee: optee: Fix supplicant wait loop") made the client wait as killable so it can be interrupted during shutdown or after a supplicant crash. This changes the original lifetime expectations: the client task can now terminate while the supplicant is still processing its request. If the client exits first it removes the request from its queue and kfree()s it, while the request ID remains in supp->idr. A subsequent lookup on the supplicant path then dereferences freed memory, leading to a use-after-free. Serialise access to the request with supp->mutex: * Hold supp->mutex in optee_supp_recv() and optee_supp_send() while looking up and touching the request. * Let optee_supp_thrd_req() notice that the client has terminated and signal optee_supp_send() accordingly. With these changes the request cannot be freed while the supplicant still has a reference, eliminating the race.
Quoted source text, attributed separately from HOL analysis.