CVE-2024-39493 — crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak
In the Linux kernel, the following vulnerability has been resolved: crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak Using completion_done to determine whether the caller has gone away only works after a complete call. Furthermore it's still possible that the caller has not yet called wait_for_completion, resulting in another potential UAF. Fix this by making the caller use cancel_work_sync and then freeing the memory safely.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 0.2% (30-day exploitation probability)+2
- Technical severity (medium)+3
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
CISA SSVC assessment CISA
Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
- Documented patch — git.kernel.org (NIST National Vulnerability Database)
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Linux Linux, Linux Linux Kernel).
- Apply the fixed version or the patch documented under Remediation.
- Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Linux | Linux |
≥ 7d42e097607c4d246d99225bf2b195b6167a210c and < d0fd124972724cce0d48b9865ce3e273ef69e246version 6.9≥ 6.8.3 and < 6.9≥ 6.7.12 and < 6.8≥ 6.6.24 and < 6.6.34≥ 6.1.84 and < 6.1.94≥ 5.15.154 and < 5.15.161≥ 5.10.215 and < 5.10.219 and 11 more≥ 5.4.274 and < 5.4.278≥ 4.19.312 and < 4.19.316version bb279ead42263e9fb09480f02a4247b2c287d828version 0c2cf5142bfb634c0ef0a1a69cdf37950747d0be≥ 7d42e097607c4d246d99225bf2b195b6167a210c and < d3b17c6d9dddc2db3670bc9be628b122416a3d26≥ 8a5a7611ccc7b1fba8d933a9f22a2e76859d94dc and < c2d443aa1ae3175c13a665f3a24b8acd759ce9c3≥ 226fc408c5fcd23cc4186f05ea3a09a7a9aef2f7 and < e7428e7e3fe94a5089dc12ffe5bc31574d2315ad≥ 4ae5a97781ce7d6ecc9c7055396535815b64ca4f and < 3fb4601e0db10d4fe25e46f3fa308d40d37366bd≥ d03092550f526a79cf1ade7f0dfa74906f39eb71 and < a718b6d2a329e069b27d9049a71be5931e71d960≥ 8e81cd58aee14a470891733181a47d123193ba81 and < 6396b33e98c096bff9c253ed49c008247963492a≥ daba62d9eeddcc5b1081be7d348ca836c83c59d7 and < 0ce5964b82f212f4df6a9813f09a0b5de15bd9c8 |
Vulnerable | CVE Program (cve.org) e CISA ADP |
| Linux | Linux Kernel | ≥ 4.19.312 and < 4.19.316≥ 6.9 and < 6.9.5≥ 6.6.24 and < 6.6.34≥ 6.1.84 and < 6.1.94≥ 5.15.154 and < 5.15.161≥ 5.10.215 and < 5.10.219≥ 5.4.274 and < 5.4.278 | Vulnerable | NIST National Vulnerability Database |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 5.5 | CVSS 3.1 | Medium | 1.8 | 3.6 | nvd@nist.gov via NIST National Vulnerability Database |
| 5.5 | CVSS 3.1 | Medium | — | — | GitHub, Inc. via GitHub Security Advisories |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H (score shown at the top: nvd@nist.gov) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
CWE-401 · Missing Release of Memory after Effective Lifetime
EPSS over time FIRST
Oct 14, 2026 → Oct 15, 2026 · 2 reading(s) · max 0.24%
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
- Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
Timeline
What happened to this CVE, newest first.
- 2026
- Affected products added · linux/linux
- SSVC assessment updated
- Record published
- Fix documented
- Affected products added · linux/linux kernel
- CVSS changed · 5.5
- Source status changed · → Modified
- Record created in this database
- 2024
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 2× References added · Oct 14, 2026 – Oct 14, 2026
- 1× Official description updated · Oct 14, 2026 – Oct 14, 2026
References
12 on the record
- git.kernel.org/stable/c/d3b17c6d9dddc2db3670bc9be628b122416a3d26
- git.kernel.org/stable/c/a718b6d2a329e069b27d9049a71be5931e71d960
- git.kernel.org/stable/c/d0fd124972724cce0d48b9865ce3e273ef69e246
- git.kernel.org/stable/c/3fb4601e0db10d4fe25e46f3fa308d40d37366bd
- git.kernel.org/stable/c/c2d443aa1ae3175c13a665f3a24b8acd759ce9c3
- git.kernel.org/stable/c/6396b33e98c096bff9c253ed49c008247963492a
- git.kernel.org/stable/c/e7428e7e3fe94a5089dc12ffe5bc31574d2315ad
- git.kernel.org/stable/c/0ce5964b82f212f4df6a9813f09a0b5de15bd9c8
- cert-portal.siemens.com/productcert/html/ssa-613116.html
- github.com/advisories/GHSA-vc5j-jhxm-jh4w
- nvd.nist.gov/vuln/detail/CVE-2024-39493
- cert-portal.siemens.com/productcert/html/ssa-265688.html
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 1d
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 1d
- Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 2d
- Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 2d
- Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 2d
- Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 2d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2024-39493 is "crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak", rated Medium. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.5 describes technical severity. EPSS 0.24% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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